Exploitation evidence
Known exploited · CISA KEV listed
Added 2023-10-23. Ransomware campaign use: Unknown.
CISA required action: Verify that instances of Cisco IOS XE Web UI are in compliance with BOD 23-02 and apply mitigations per vendor instructions. For affected products (Cisco IOS XE Web UI exposed to the internet or to untrusted networks), follow vendor instructions to determine if a system may have been compromised and immediately report positive findings to CISA.
CISA due date: 2023-10-27. This is the catalog’s deadline, not an assessment of your organization’s exposure.
KEV checked 13 Nov 2026, 00:20 Jerusalem · Original catalog ↗Reported products and versions
Cisco / Cisco IOS XE Software
Default status: Not specified
- affected: 16.1.1
- affected: 16.1.2
- affected: 16.1.3
- affected: 16.2.1
- affected: 16.2.2
- affected: 16.3.1
- affected: 16.3.2
- affected: 16.3.3
- affected: 16.3.1a
- affected: 16.3.4
- affected: 16.3.5
- affected: 16.3.5b
- affected: 16.3.6
- affected: 16.3.7
- affected: 16.3.8
- affected: 16.3.9
- affected: 16.3.10
- affected: 16.3.11
- affected: 16.4.1
- affected: 16.4.2
- affected: 16.4.3
- affected: 16.5.1
- affected: 16.5.1a
- affected: 16.5.1b
- affected: 16.5.2
- affected: 16.5.3
- affected: 16.6.1
- affected: 16.6.2
- affected: 16.6.3
- affected: 16.6.4
- affected: 16.6.5
- affected: 16.6.4a
- affected: 16.6.5a
- affected: 16.6.6
- affected: 16.6.7
- affected: 16.6.8
- affected: 16.6.9
- affected: 16.6.10
- affected: 16.7.1
- affected: 16.7.1a
- affected: 16.7.1b
- affected: 16.7.2
- affected: 16.7.3
- affected: 16.7.4
- affected: 16.8.1
- affected: 16.8.1a
- affected: 16.8.1b
- affected: 16.8.1s
- affected: 16.8.1c
- affected: 16.8.1d
- affected: 16.8.2
- affected: 16.8.1e
- affected: 16.8.3
- affected: 16.9.1
- affected: 16.9.2
- affected: 16.9.1a
- affected: 16.9.1b
- affected: 16.9.1s
- affected: 16.9.3
- affected: 16.9.4
- affected: 16.9.3a
- affected: 16.9.5
- affected: 16.9.5f
- affected: 16.9.6
- affected: 16.9.7
- affected: 16.9.8
- affected: 16.10.1
- affected: 16.10.1a
- affected: 16.10.1b
- affected: 16.10.1s
- affected: 16.10.1c
- affected: 16.10.1e
- affected: 16.10.1d
- affected: 16.10.2
- affected: 16.10.1f
- affected: 16.10.1g
- affected: 16.10.3
- affected: 16.11.1
- affected: 16.11.1a
- affected: 16.11.1b
- affected: 16.11.2
- affected: 16.11.1s
- affected: 16.12.1
- affected: 16.12.1s
- affected: 16.12.1a
- affected: 16.12.1c
- affected: 16.12.1w
- affected: 16.12.2
- affected: 16.12.1y
- affected: 16.12.2a
- affected: 16.12.3
- affected: 16.12.8
- affected: 16.12.2s
- affected: 16.12.1x
- affected: 16.12.1t
- affected: 16.12.4
- affected: 16.12.3s
- affected: 16.12.3a
- affected: 16.12.4a
- affected: 16.12.5
- affected: 16.12.6
- affected: 16.12.1z1
- affected: 16.12.5a
- affected: 16.12.5b
- affected: 16.12.1z2
- affected: 16.12.6a
- affected: 16.12.7
- affected: 16.12.9
- affected: 16.12.10
- affected: 17.1.1
- affected: 17.1.1a
- affected: 17.1.1s
- affected: 17.1.1t
- affected: 17.1.3
- affected: 17.2.1
- affected: 17.2.1r
- affected: 17.2.1a
- affected: 17.2.1v
- affected: 17.2.2
- affected: 17.2.3
- affected: 17.3.1
- affected: 17.3.2
- affected: 17.3.3
- affected: 17.3.1a
- affected: 17.3.1w
- affected: 17.3.2a
- affected: 17.3.1x
- affected: 17.3.1z
- affected: 17.3.4
- affected: 17.3.5
- affected: 17.3.4a
- affected: 17.3.6
- affected: 17.3.4b
- affected: 17.3.4c
- affected: 17.3.5a
- affected: 17.3.5b
- affected: 17.3.7
- affected: 17.3.8
- affected: 17.4.1
- affected: 17.4.2
- affected: 17.4.1a
- affected: 17.4.1b
- affected: 17.4.2a
- affected: 17.5.1
- affected: 17.5.1a
- affected: 17.5.1b
- affected: 17.5.1c
- affected: 17.6.1
- affected: 17.6.2
- affected: 17.6.1w
- affected: 17.6.1a
- affected: 17.6.1x
- affected: 17.6.3
- affected: 17.6.1y
- affected: 17.6.1z
- affected: 17.6.3a
- affected: 17.6.4
- affected: 17.6.1z1
- affected: 17.6.5
- affected: 17.6.6
- affected: 17.7.1
- affected: 17.7.1a
- affected: 17.7.1b
- affected: 17.7.2
- affected: 17.10.1
- affected: 17.10.1a
- affected: 17.10.1b
- affected: 17.8.1
- affected: 17.8.1a
- affected: 17.9.1
- affected: 17.9.1w
- affected: 17.9.2
- affected: 17.9.1a
- affected: 17.9.1x
- affected: 17.9.1y
- affected: 17.9.3
- affected: 17.9.2a
- affected: 17.9.1x1
- affected: 17.9.3a
- affected: 17.9.4
- affected: 17.9.1y1
- affected: 17.11.1
- affected: 17.11.1a
- affected: 17.12.1
- affected: 17.12.1a
- affected: 17.11.99SW
Fixes and workarounds
No explicit solution text in the downloaded CVE record. Consult the vendor advisory; unaffected version ranges are shown above as reported, not inferred as a patch recommendation.
Sources and related reporting
Observed change timeline
History begins when Egret first downloads each source. It is not the complete upstream CVE history.
12 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-12",
"epss": 0.92938,
"percentile": 0.99834
}10 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-10",
"epss": 0.92938,
"percentile": 0.99833
}09 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-09",
"epss": 0.92938,
"percentile": 0.99833
}08 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-08",
"epss": 0.92938,
"percentile": 0.99833
}07 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-07",
"epss": 0.92938,
"percentile": 0.99832
}06 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-06",
"epss": 0.92938,
"percentile": 0.99832
}06 Nov 2026, 06:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-05",
"epss": 0.92938,
"percentile": 0.99832
}05 Nov 2026, 00:20 Jerusalem · CVE Program record changed
Stored CNA snapshot at this observation.
{
"containers": {
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"references": [
{
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"tags": [
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"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-webui-privesc-j22SaA4z"
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"title": "CVE Program Container"
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{
"metrics": [
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"timestamp": "2023-11-15T16:39:19.546517Z",
"version": "2.0.3"
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"type": "ssvc"
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},
{
"other": {
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"reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-20273"
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"cna": {
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{
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"vendor": "Cisco",
"versions": [
{
"status": "affected",
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{
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{
"status": "affected",
"version": "16.1.3"
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{
"status": "affected",
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{
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{
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{
"status": "affected",
"version": "16.3.2"
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{
"status": "affected",
"version": "16.3.3"
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{
"status": "affected",
"version": "16.3.1a"
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{
"status": "affected",
"version": "16.3.4"
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{
"status": "affected",
"version": "16.3.5"
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{
"status": "affected",
"version": "16.3.5b"
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{
"status": "affected",
"version": "16.3.6"
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{
"status": "affected",
"version": "16.3.7"
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{
"status": "affected",
"version": "16.3.8"
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{
"status": "affected",
"version": "16.3.9"
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{
"status": "affected",
"version": "16.3.10"
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{
"status": "affected",
"version": "16.3.11"
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{
"status": "affected",
"version": "16.4.1"
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{
"status": "affected",
"version": "16.4.2"
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{
"status": "affected",
"version": "16.4.3"
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{
"status": "affected",
"version": "16.5.1"
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{
"status": "affected",
"version": "16.5.1a"
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{
"status": "affected",
"version": "16.5.1b"
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{
"status": "affected",
"version": "16.5.2"
},
{
"status": "affected",
"version": "16.5.3"
},
{
"status": "affected",
"version": "16.6.1"
},
{
"status": "affected",
"version": "16.6.2"
},
{
"status": "affected",
"version": "16.6.3"
},
{
"status": "affected",
"version": "16.6.4"
},
{
"status": "affected",
"version": "16.6.5"
},
{
"status": "affected",
"version": "16.6.4a"
},
{
"status": "affected",
"version": "16.6.5a"
},
{
"status": "affected",
"version": "16.6.6"
},
{
"status": "affected",
"version": "16.6.7"
},
{
"status": "affected",
"version": "16.6.8"
},
{
"status": "affected",
"version": "16.6.9"
},
{
"status": "affected",
"version": "16.6.10"
},
{
"status": "affected",
"version": "16.7.1"
},
{
"status": "affected",
"version": "16.7.1a"
},
{
"status": "affected",
"version": "16.7.1b"
},
{
"status": "affected",
"version": "16.7.2"
},
{
"status": "affected",
"version": "16.7.3"
},
{
"status": "affected",
"version": "16.7.4"
},
{
"status": "affected",
"version": "16.8.1"
},
{
"status": "affected",
"version": "16.8.1a"
},
{
"status": "affected",
"version": "16.8.1b"
},
{
"status": "affected",
"version": "16.8.1s"
},
{
"status": "affected",
"version": "16.8.1c"
},
{
"status": "affected",
"version": "16.8.1d"
},
{
"status": "affected",
"version": "16.8.2"
},
{
"status": "affected",
"version": "16.8.1e"
},
{
"status": "affected",
"version": "16.8.3"
},
{
"status": "affected",
"version": "16.9.1"
},
{
"status": "affected",
"version": "16.9.2"
},
{
"status": "affected",
"version": "16.9.1a"
},
{
"status": "affected",
"version": "16.9.1b"
},
{
"status": "affected",
"version": "16.9.1s"
},
{
"status": "affected",
"version": "16.9.3"
},
{
"status": "affected",
"version": "16.9.4"
},
{
"status": "affected",
"version": "16.9.3a"
},
{
"status": "affected",
"version": "16.9.5"
},
{
"status": "affected",
"version": "16.9.5f"
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{
"status": "affected",
"version": "16.9.6"
},
{
"status": "affected",
"version": "16.9.7"
},
{
"status": "affected",
"version": "16.9.8"
},
{
"status": "affected",
"version": "16.10.1"
},
{
"status": "affected",
"version": "16.10.1a"
},
{
"status": "affected",
"version": "16.10.1b"
},
{
"status": "affected",
"version": "16.10.1s"
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{
"status": "affected",
"version": "16.10.1c"
},
{
"status": "affected",
"version": "16.10.1e"
},
{
"status": "affected",
"version": "16.10.1d"
},
{
"status": "affected",
"version": "16.10.2"
},
{
"status": "affected",
"version": "16.10.1f"
},
{
"status": "affected",
"version": "16.10.1g"
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{
"status": "affected",
"version": "16.10.3"
},
{
"status": "affected",
"version": "16.11.1"
},
{
"status": "affected",
"version": "16.11.1a"
},
{
"status": "affected",
"version": "16.11.1b"
},
{
"status": "affected",
"version": "16.11.2"
},
{
"status": "affected",
"version": "16.11.1s"
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{
"status": "affected",
"version": "16.12.1"
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{
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"version": "16.12.1s"
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{
"status": "affected",
"version": "16.12.1a"
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{
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"version": "16.12.1c"
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{
"status": "affected",
"version": "16.12.1w"
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{
"status": "affected",
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{
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{
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{
"status": "affected",
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{
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{
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{
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{
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{
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{
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{
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{
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{
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"version": "16.12.5"
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
"status": "affected",
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{
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{
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{
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"version": "17.1.1t"
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{
"status": "affected",
"version": "17.1.3"
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{
"status": "affected",
"version": "17.2.1"
},
{
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"version": "17.2.1r"
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{
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"version": "17.2.1a"
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{
"status": "affected",
"version": "17.2.1v"
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{
"status": "affected",
"version": "17.2.2"
},
{
"status": "affected",
"version": "17.2.3"
},
{
"status": "affected",
"version": "17.3.1"
},
{
"status": "affected",
"version": "17.3.2"
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{
"status": "affected",
"version": "17.3.3"
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{
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"version": "17.3.1a"
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{
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"version": "17.3.1w"
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{
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{
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{
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"version": "17.3.1z"
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{
"status": "affected",
"version": "17.3.4"
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{
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"version": "17.3.5"
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{
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"version": "17.3.4a"
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{
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"version": "17.3.6"
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{
"status": "affected",
"version": "17.3.4b"
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{
"status": "affected",
"version": "17.3.4c"
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{
"status": "affected",
"version": "17.3.5a"
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{
"status": "affected",
"version": "17.3.5b"
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{
"status": "affected",
"version": "17.3.7"
},
{
"status": "affected",
"version": "17.3.8"
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{
"status": "affected",
"version": "17.4.1"
},
{
"status": "affected",
"version": "17.4.2"
},
{
"status": "affected",
"version": "17.4.1a"
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{
"status": "affected",
"version": "17.4.1b"
},
{
"status": "affected",
"version": "17.4.2a"
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{
"status": "affected",
"version": "17.5.1"
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{
"status": "affected",
"version": "17.5.1a"
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{
"status": "affected",
"version": "17.5.1b"
},
{
"status": "affected",
"version": "17.5.1c"
},
{
"status": "affected",
"version": "17.6.1"
},
{
"status": "affected",
"version": "17.6.2"
},
{
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"version": "17.6.1w"
},
{
"status": "affected",
"version": "17.6.1a"
},
{
"status": "affected",
"version": "17.6.1x"
},
{
"status": "affected",
"version": "17.6.3"
},
{
"status": "affected",
"version": "17.6.1y"
},
{
"status": "affected",
"version": "17.6.1z"
},
{
"status": "affected",
"version": "17.6.3a"
},
{
"status": "affected",
"version": "17.6.4"
},
{
"status": "affected",
"version": "17.6.1z1"
},
{
"status": "affected",
"version": "17.6.5"
},
{
"status": "affected",
"version": "17.6.6"
},
{
"status": "affected",
"version": "17.7.1"
},
{
"status": "affected",
"version": "17.7.1a"
},
{
"status": "affected",
"version": "17.7.1b"
},
{
"status": "affected",
"version": "17.7.2"
},
{
"status": "affected",
"version": "17.10.1"
},
{
"status": "affected",
"version": "17.10.1a"
},
{
"status": "affected",
"version": "17.10.1b"
},
{
"status": "affected",
"version": "17.8.1"
},
{
"status": "affected",
"version": "17.8.1a"
},
{
"status": "affected",
"version": "17.9.1"
},
{
"status": "affected",
"version": "17.9.1w"
},
{
"status": "affected",
"version": "17.9.2"
},
{
"status": "affected",
"version": "17.9.1a"
},
{
"status": "affected",
"version": "17.9.1x"
},
{
"status": "affected",
"version": "17.9.1y"
},
{
"status": "affected",
"version": "17.9.3"
},
{
"status": "affected",
"version": "17.9.2a"
},
{
"status": "affected",
"version": "17.9.1x1"
},
{
"status": "affected",
"version": "17.9.3a"
},
{
"status": "affected",
"version": "17.9.4"
},
{
"status": "affected",
"version": "17.9.1y1"
},
{
"status": "affected",
"version": "17.11.1"
},
{
"status": "affected",
"version": "17.11.1a"
},
{
"status": "affected",
"version": "17.12.1"
},
{
"status": "affected",
"version": "17.12.1a"
},
{
"status": "affected",
"version": "17.11.99SW"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "A vulnerability in the web UI feature of Cisco IOS XE Software could allow an authenticated, remote attacker to inject commands with the privileges of root. This vulnerability is due to insufficient input validation. An attacker could exploit this vulnerability by sending crafted input to the web UI. A successful exploit could allow the attacker to inject commands to the underlying operating system with root privileges."
}
],
"exploits": [
{
"lang": "en",
"value": "Cisco is aware of active exploitation of these vulnerabilities."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.2,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "HIGH",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"format": "cvssV3_1"
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-78",
"description": "Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')",
"lang": "en",
"type": "cwe"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2024-01-25T16:58:37.816Z",
"orgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
"shortName": "cisco"
},
"references": [
{
"name": "cisco-sa-iosxe-webui-privesc-j22SaA4z",
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-webui-privesc-j22SaA4z"
}
],
"source": {
"advisory": "cisco-sa-iosxe-webui-privesc-j22SaA4z",
"defects": [
"CSCwh87343"
],
"discovery": "EXTERNAL"
}
}
},
"cveMetadata": {
"assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
"assignerShortName": "cisco",
"cveId": "CVE-2023-20273",
"datePublished": "2023-10-24T14:13:36.311Z",
"dateReserved": "2022-10-27T18:47:50.373Z",
"dateUpdated": "2025-10-21T23:05:33.896Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}04 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-04",
"epss": 0.92938,
"percentile": 0.99832
}03 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-03",
"epss": 0.92938,
"percentile": 0.99832
}03 Nov 2026, 02:22 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-02",
"epss": 0.92938,
"percentile": 0.99831
}03 Nov 2026, 02:22 Jerusalem · CISA KEV status changed
Stored KEV snapshot at this observation.
{
"cveID": "CVE-2023-20273",
"cwes": [
"CWE-78"
],
"dateAdded": "2023-10-23",
"dueDate": "2023-10-27",
"forensicTriage": "No",
"knownRansomwareCampaignUse": "Unknown",
"notes": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-webui-privesc-j22SaA4z; https://nvd.nist.gov/vuln/detail/CVE-2023-20273",
"product": "Cisco IOS XE Web UI",
"requiredAction": "Verify that instances of Cisco IOS XE Web UI are in compliance with BOD 23-02 and apply mitigations per vendor instructions. For affected products (Cisco IOS XE Web UI exposed to the internet or to untrusted networks), follow vendor instructions to determine if a system may have been compromised and immediately report positive findings to CISA.",
"shortDescription": "Cisco IOS XE contains a command injection vulnerability in the web user interface. When chained with CVE-2023-20198, the attacker can leverage the new local user to elevate privilege to root and write the implant to the file system. Cisco identified CVE-2023-20273 as the vulnerability exploited to deploy the implant. CVE-2021-1435, previously associated with the exploitation events, is no longer believed to be related to this activity.",
"vendorProject": "Cisco",
"vulnerabilityName": "Cisco IOS XE Web UI Command Injection Vulnerability"
}