Exploitation evidence
Known exploited · CISA KEV listed
Added 2025-12-17. Ransomware campaign use: Unknown.
CISA required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
CISA due date: 2025-12-24. 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 Secure Email
Default status: unknown
- affected: 14.0.0-698
- affected: 13.5.1-277
- affected: 13.0.0-392
- affected: 14.2.0-620
- affected: 13.0.5-007
- affected: 13.5.4-038
- affected: 14.2.1-020
- affected: 14.3.0-032
- affected: 15.0.0-104
- affected: 15.0.1-030
- affected: 15.5.0-048
- affected: 15.5.1-055
- affected: 15.5.2-018
- affected: 16.0.0-050
- affected: 15.0.3-002
- affected: 16.0.0-054
- affected: 15.5.3-022
- affected: 16.0.1-017
Cisco / Cisco Secure Email and Web Manager
Default status: unknown
- affected: 13.6.2-023
- affected: 13.6.2-078
- affected: 13.0.0-249
- affected: 13.0.0-277
- affected: 13.8.1-052
- affected: 13.8.1-068
- affected: 13.8.1-074
- affected: 14.0.0-404
- affected: 12.8.1-002
- affected: 14.1.0-227
- affected: 13.6.1-201
- affected: 14.2.0-203
- affected: 14.2.0-212
- affected: 12.8.1-021
- affected: 13.8.1-108
- affected: 14.2.0-224
- affected: 14.3.0-120
- affected: 15.0.0-334
- affected: 15.5.1-024
- affected: 15.5.1-029
- affected: 15.5.2-005
- affected: 16.0.0-195
- affected: 15.5.3-017
- affected: 16.0.1-010
- affected: 15.0.1-035
- affected: 16.0.2-088
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": 0.32392,
"percentile": 0.98353
}10 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-10",
"epss": 0.32392,
"percentile": 0.98342
}09 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-09",
"epss": 0.32392,
"percentile": 0.98341
}08 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-08",
"epss": 0.32392,
"percentile": 0.9834
}07 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-07",
"epss": 0.32392,
"percentile": 0.98339
}06 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-06",
"epss": 0.32392,
"percentile": 0.98338
}06 Nov 2026, 06:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-05",
"epss": 0.32392,
"percentile": 0.98337
}04 Nov 2026, 18:20 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-04",
"epss": 0.32392,
"percentile": 0.98336
}04 Nov 2026, 00:20 Jerusalem · CVE Program record changed
Stored CNA snapshot at this observation.
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2025-20393",
"options": [
{
"Exploitation": "active"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-12-18T04:55:22.327258Z",
"version": "2.0.3"
},
"type": "ssvc"
}
},
{
"other": {
"content": {
"dateAdded": "2025-12-17",
"reference": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-20393"
},
"type": "kev"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-10-07T19:22:07.139Z",
"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-2025-20393"
}
],
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unknown",
"product": "Cisco Secure Email",
"vendor": "Cisco",
"versions": [
{
"status": "affected",
"version": "14.0.0-698"
},
{
"status": "affected",
"version": "13.5.1-277"
},
{
"status": "affected",
"version": "13.0.0-392"
},
{
"status": "affected",
"version": "14.2.0-620"
},
{
"status": "affected",
"version": "13.0.5-007"
},
{
"status": "affected",
"version": "13.5.4-038"
},
{
"status": "affected",
"version": "14.2.1-020"
},
{
"status": "affected",
"version": "14.3.0-032"
},
{
"status": "affected",
"version": "15.0.0-104"
},
{
"status": "affected",
"version": "15.0.1-030"
},
{
"status": "affected",
"version": "15.5.0-048"
},
{
"status": "affected",
"version": "15.5.1-055"
},
{
"status": "affected",
"version": "15.5.2-018"
},
{
"status": "affected",
"version": "16.0.0-050"
},
{
"status": "affected",
"version": "15.0.3-002"
},
{
"status": "affected",
"version": "16.0.0-054"
},
{
"status": "affected",
"version": "15.5.3-022"
},
{
"status": "affected",
"version": "16.0.1-017"
}
]
},
{
"defaultStatus": "unknown",
"product": "Cisco Secure Email and Web Manager",
"vendor": "Cisco",
"versions": [
{
"status": "affected",
"version": "13.6.2-023"
},
{
"status": "affected",
"version": "13.6.2-078"
},
{
"status": "affected",
"version": "13.0.0-249"
},
{
"status": "affected",
"version": "13.0.0-277"
},
{
"status": "affected",
"version": "13.8.1-052"
},
{
"status": "affected",
"version": "13.8.1-068"
},
{
"status": "affected",
"version": "13.8.1-074"
},
{
"status": "affected",
"version": "14.0.0-404"
},
{
"status": "affected",
"version": "12.8.1-002"
},
{
"status": "affected",
"version": "14.1.0-227"
},
{
"status": "affected",
"version": "13.6.1-201"
},
{
"status": "affected",
"version": "14.2.0-203"
},
{
"status": "affected",
"version": "14.2.0-212"
},
{
"status": "affected",
"version": "12.8.1-021"
},
{
"status": "affected",
"version": "13.8.1-108"
},
{
"status": "affected",
"version": "14.2.0-224"
},
{
"status": "affected",
"version": "14.3.0-120"
},
{
"status": "affected",
"version": "15.0.0-334"
},
{
"status": "affected",
"version": "15.5.1-024"
},
{
"status": "affected",
"version": "15.5.1-029"
},
{
"status": "affected",
"version": "15.5.2-005"
},
{
"status": "affected",
"version": "16.0.0-195"
},
{
"status": "affected",
"version": "15.5.3-017"
},
{
"status": "affected",
"version": "16.0.1-010"
},
{
"status": "affected",
"version": "15.0.1-035"
},
{
"status": "affected",
"version": "16.0.2-088"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "A vulnerability in the Spam Quarantine feature of Cisco AsyncOS Software for Cisco Secure Email Gateway and Cisco Secure Email and Web Manager could allow an unauthenticated, remote attacker to execute arbitrary system commands on an affected device with root privileges.\r\n\r\nThis vulnerability is due to insufficient validation of HTTP requests by the Spam Quarantine feature. An attacker could exploit this vulnerability by sending a crafted HTTP request to the affected device. A successful exploit could allow the attacker to execute arbitrary commands on the underlying operating system with root privileges."
}
],
"exploits": [
{
"lang": "en",
"value": "In December 2025, the Cisco Product Security Incident Response Team (PSIRT) became aware of potentially malicious activity that targets Cisco Secure Email Gateway and Cisco Secure Email and Web Manager appliances."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 10,
"baseSeverity": "CRITICAL",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
"version": "3.1"
},
"format": "cvssV3_1"
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-20",
"description": "Improper Input Validation",
"lang": "en",
"type": "cwe"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-01-15T16:32:03.740Z",
"orgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
"shortName": "cisco"
},
"references": [
{
"name": "cisco-sa-sma-attack-N9bf4",
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sma-attack-N9bf4"
}
],
"source": {
"advisory": "cisco-sa-sma-attack-N9bf4",
"defects": [
"CSCws36549"
],
"discovery": "EXTERNAL"
},
"title": "Cisco Secure Email Gateway and Cisco Secure Email and Web Manager Remote Command Execution Vulnerability"
}
},
"cveMetadata": {
"assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633",
"assignerShortName": "cisco",
"cveId": "CVE-2025-20393",
"datePublished": "2025-12-17T16:47:13.128Z",
"dateReserved": "2024-10-10T19:15:13.266Z",
"dateUpdated": "2026-10-07T19:22:07.139Z",
"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": 0.32392,
"percentile": 0.98333
}03 Nov 2026, 02:22 Jerusalem · EPSS observation updated
Stored EPSS snapshot at this observation.
{
"date": "2026-11-02",
"epss": 0.32392,
"percentile": 0.98331
}03 Nov 2026, 02:22 Jerusalem · CISA KEV status changed
Stored KEV snapshot at this observation.
{
"cveID": "CVE-2025-20393",
"cwes": [
"CWE-20"
],
"dateAdded": "2025-12-17",
"dueDate": "2025-12-24",
"forensicTriage": "No",
"knownRansomwareCampaignUse": "Unknown",
"notes": "Please adhere to Cisco's guidelines to assess exposure and mitigate risks. Check for signs of potential compromise on all internet accessible Cisco products affected by this vulnerability. Apply any final mitigations provided by the vendor as soon as they become available. For more information please see: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sma-attack-N9bf4 ; https://nvd.nist.gov/vuln/detail/CVE-2025-20393",
"product": "Multiple Products",
"requiredAction": "Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.",
"shortDescription": "Cisco Secure Email Gateway, Secure Email, AsyncOS Software, and Web Manager appliances contains an improper input validation vulnerability that allows threat actors to execute arbitrary commands with root privileges on the underlying operating system of an affected appliance.",
"vendorProject": "Cisco",
"vulnerabilityName": "Cisco Multiple Products Improper Input Validation Vulnerability"
}