Exploitation evidence
Known exploited · CISA KEV listed
Added 2023-06-13. Ransomware campaign use: Known.
CISA required action: Apply updates per vendor instructions.
CISA due date: 2023-07-04. 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
Fortinet / FortiOS-6K7K
Default status: unaffected
- affected: 7.0.10
- affected: 7.0.5
- affected: 6.4.12
- affected: 6.4.10
- affected: 6.4.8
- affected: 6.4.6
- affected: 6.4.2
- affected: 6.2.9 to ≤ 6.2.13 (semver)
- affected: 6.2.6 to ≤ 6.2.7 (semver)
- affected: 6.2.4
- affected: 6.0.12 to ≤ 6.0.16 (semver)
- affected: 6.0.10
Fortinet / FortiProxy
Default status: unaffected
- affected: 7.2.0 to ≤ 7.2.3 (semver)
- affected: 7.0.0 to ≤ 7.0.9 (semver)
- affected: 2.0.0 to ≤ 2.0.12 (semver)
- affected: 1.2.0 to ≤ 1.2.13 (semver)
- affected: 1.1.0 to ≤ 1.1.6 (semver)
Fortinet / FortiOS
Default status: unaffected
- affected: 7.2.0 to ≤ 7.2.4 (semver)
- affected: 7.0.0 to ≤ 7.0.11 (semver)
- affected: 6.4.0 to ≤ 6.4.12 (semver)
- affected: 6.2.0 to ≤ 6.2.13 (semver)
- affected: 6.0.0 to ≤ 6.0.16 (semver)
Fixes and workarounds
Please upgrade to FortiOS-6K7K version 7.0.12 or above Please upgrade to FortiOS-6K7K version 6.4.13 or above Please upgrade to FortiOS-6K7K version 6.2.15 or above Please upgrade to FortiOS-6K7K version 6.0.17 or above Please upgrade to FortiProxy version 7.2.4 or above Please upgrade to FortiProxy version 7.0.10 or above Please upgrade to FortiOS version 7.4.0 or above Please upgrade to FortiOS version 7.2.5 or above Please upgrade to FortiOS version 7.0.12 or above Please upgrade to FortiOS version 6.4.13 or above Please upgrade to FortiOS version 6.2.14 or above Please upgrade to FortiOS version 6.0.17 or above
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": 0.8675,
"percentile": 0.99746
}10 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-10",
"epss": 0.8675,
"percentile": 0.99745
}09 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-09",
"epss": 0.8675,
"percentile": 0.99744
}08 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-08",
"epss": 0.85689,
"percentile": 0.99728
}07 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-07",
"epss": 0.85689,
"percentile": 0.99727
}06 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-06",
"epss": 0.85689,
"percentile": 0.99727
}06 Nov 2026, 06:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-05",
"epss": 0.85689,
"percentile": 0.99727
}04 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-04",
"epss": 0.85689,
"percentile": 0.99727
}04 Nov 2026, 18:20 Jerusalem · CVE Program record changed
Stored CNA snapshot at this observation.
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-02T12:23:30.864Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"name": "https://fortiguard.com/psirt/FG-IR-23-097",
"tags": [
"x_transferred"
],
"url": "https://fortiguard.com/psirt/FG-IR-23-097"
}
],
"title": "CVE Program Container"
},
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2023-27997",
"options": [
{
"Exploitation": "active"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2023-06-12T00:00:00+00:00",
"version": "2.0.3"
},
"type": "ssvc"
}
},
{
"other": {
"content": {
"dateAdded": "2023-06-13",
"reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-27997"
},
"type": "kev"
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}
],
"providerMetadata": {
"dateUpdated": "2026-07-31T03:55:27.798Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"references": [
{
"tags": [
"government-resource"
],
"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-27997"
}
],
"timeline": [
{
"lang": "en",
"time": "2023-06-13T00:00:00.000Z",
"value": "CVE-2023-27997 added to CISA KEV"
}
],
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "FortiOS-6K7K",
"vendor": "Fortinet",
"versions": [
{
"status": "affected",
"version": "7.0.10"
},
{
"status": "affected",
"version": "7.0.5"
},
{
"status": "affected",
"version": "6.4.12"
},
{
"status": "affected",
"version": "6.4.10"
},
{
"status": "affected",
"version": "6.4.8"
},
{
"status": "affected",
"version": "6.4.6"
},
{
"status": "affected",
"version": "6.4.2"
},
{
"lessThanOrEqual": "6.2.13",
"status": "affected",
"version": "6.2.9",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.2.7",
"status": "affected",
"version": "6.2.6",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.2.4"
},
{
"lessThanOrEqual": "6.0.16",
"status": "affected",
"version": "6.0.12",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.0.10"
}
]
},
{
"defaultStatus": "unaffected",
"product": "FortiProxy",
"vendor": "Fortinet",
"versions": [
{
"lessThanOrEqual": "7.2.3",
"status": "affected",
"version": "7.2.0",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.0.9",
"status": "affected",
"version": "7.0.0",
"versionType": "semver"
},
{
"lessThanOrEqual": "2.0.12",
"status": "affected",
"version": "2.0.0",
"versionType": "semver"
},
{
"lessThanOrEqual": "1.2.13",
"status": "affected",
"version": "1.2.0",
"versionType": "semver"
},
{
"lessThanOrEqual": "1.1.6",
"status": "affected",
"version": "1.1.0",
"versionType": "semver"
}
]
},
{
"defaultStatus": "unaffected",
"product": "FortiOS",
"vendor": "Fortinet",
"versions": [
{
"lessThanOrEqual": "7.2.4",
"status": "affected",
"version": "7.2.0",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.0.11",
"status": "affected",
"version": "7.0.0",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.4.12",
"status": "affected",
"version": "6.4.0",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.2.13",
"status": "affected",
"version": "6.2.0",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.0.16",
"status": "affected",
"version": "6.0.0",
"versionType": "semver"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "A heap-based buffer overflow vulnerability [CWE-122] in FortiOS version 7.2.4 and below, version 7.0.11 and below, version 6.4.12 and below, version 6.0.16 and below and FortiProxy version 7.2.3 and below, version 7.0.9 and below, version 2.0.12 and below, version 1.2 all versions, version 1.1 all versions SSL-VPN may allow a remote attacker to execute arbitrary code or commands via specifically crafted requests."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 9.2,
"baseSeverity": "CRITICAL",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:X/RC:R",
"version": "3.1"
},
"format": "CVSS"
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-122",
"description": "Execute unauthorized code or commands",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2023-06-13T08:41:47.415Z",
"orgId": "6abe59d8-c742-4dff-8ce8-9b0ca1073da8",
"shortName": "fortinet"
},
"references": [
{
"name": "https://fortiguard.com/psirt/FG-IR-23-097",
"url": "https://fortiguard.com/psirt/FG-IR-23-097"
}
],
"solutions": [
{
"lang": "en",
"value": "Please upgrade to FortiOS-6K7K version 7.0.12 or above\r\nPlease upgrade to FortiOS-6K7K version 6.4.13 or above\r\nPlease upgrade to FortiOS-6K7K version 6.2.15 or above\r\nPlease upgrade to FortiOS-6K7K version 6.0.17 or above\r\nPlease upgrade to FortiProxy version 7.2.4 or above\r\nPlease upgrade to FortiProxy version 7.0.10 or above\r\nPlease upgrade to FortiOS version 7.4.0 or above\r\nPlease upgrade to FortiOS version 7.2.5 or above\r\nPlease upgrade to FortiOS version 7.0.12 or above\r\nPlease upgrade to FortiOS version 6.4.13 or above\r\nPlease upgrade to FortiOS version 6.2.14 or above\r\nPlease upgrade to FortiOS version 6.0.17 or above"
}
]
}
},
"cveMetadata": {
"assignerOrgId": "6abe59d8-c742-4dff-8ce8-9b0ca1073da8",
"assignerShortName": "fortinet",
"cveId": "CVE-2023-27997",
"datePublished": "2023-06-13T08:41:47.415Z",
"dateReserved": "2023-03-09T10:09:33.119Z",
"dateUpdated": "2026-07-31T03:55:27.798Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}03 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-03",
"epss": 0.85689,
"percentile": 0.99726
}03 Nov 2026, 02:22 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-02",
"epss": 0.85689,
"percentile": 0.99725
}03 Nov 2026, 02:22 Jerusalem · CISA KEV status changed
Stored KEV snapshot at this observation.
{
"cveID": "CVE-2023-27997",
"cwes": [
"CWE-122"
],
"dateAdded": "2023-06-13",
"dueDate": "2023-07-04",
"forensicTriage": "No",
"knownRansomwareCampaignUse": "Known",
"notes": "https://www.fortiguard.com/psirt/FG-IR-23-097; https://nvd.nist.gov/vuln/detail/CVE-2023-27997",
"product": "FortiOS and FortiProxy SSL-VPN",
"requiredAction": "Apply updates per vendor instructions.",
"shortDescription": "Fortinet FortiOS and FortiProxy SSL-VPN contain a heap-based buffer overflow vulnerability which can allow an unauthenticated, remote attacker to execute code or commands via specifically crafted requests.",
"vendorProject": "Fortinet",
"vulnerabilityName": "Fortinet FortiOS and FortiProxy SSL-VPN Heap-Based Buffer Overflow Vulnerability"
}