CVE-2025-20393
Confirmed PUBLISHEDCisco Secure Email Gateway and Cisco Secure Email and Web Manager Remote Command Execution Vulnerability
1 day faster than CISA KEV
Recommended Action
Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
At a Glance
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. This 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.
- CVE Published
- Dec 17, 2025
- Exploitation Reported
- Jun 01, 2026
- CVSS
- 10.0 Critical
- EPSS
- 29.1%
Affected Versions
44 version rows · page 2 of 2
| Vendor | Product | Version | Status |
|---|---|---|---|
| Cisco |
Cisco Secure Email and Web Manager
|
14.0.0-404 |
Affected |
| Cisco |
Cisco Secure Email and Web Manager
|
12.8.1-002 |
Affected |
| Cisco |
Cisco Secure Email and Web Manager
|
14.1.0-227 |
Affected |
| Cisco |
Cisco Secure Email and Web Manager
|
13.6.1-201 |
Affected |
| Cisco |
Cisco Secure Email and Web Manager
|
14.2.0-203 |
Affected |
| Cisco |
Cisco Secure Email and Web Manager
|
14.2.0-212 |
Affected |
| Cisco |
Cisco Secure Email and Web Manager
|
12.8.1-021 |
Affected |
| Cisco |
Cisco Secure Email and Web Manager
|
13.8.1-108 |
Affected |
| Cisco |
Cisco Secure Email and Web Manager
|
14.2.0-224 |
Affected |
| Cisco |
Cisco Secure Email and Web Manager
|
14.3.0-120 |
Affected |
| Cisco |
Cisco Secure Email and Web Manager
|
15.0.0-334 |
Affected |
| Cisco |
Cisco Secure Email and Web Manager
|
15.5.1-024 |
Affected |
| Cisco |
Cisco Secure Email and Web Manager
|
15.5.1-029 |
Affected |
| Cisco |
Cisco Secure Email and Web Manager
|
15.5.2-005 |
Affected |
| Cisco |
Cisco Secure Email and Web Manager
|
16.0.0-195 |
Affected |
| Cisco |
Cisco Secure Email and Web Manager
|
15.5.3-017 |
Affected |
| Cisco |
Cisco Secure Email and Web Manager
|
16.0.1-010 |
Affected |
| Cisco |
Cisco Secure Email and Web Manager
|
15.0.1-035 |
Affected |
| Cisco |
Cisco Secure Email and Web Manager
|
16.0.2-088 |
Affected |
CVE References
- cisco-sa-sma-attack-N9bf4 sec.cloudapps.cisco.com · CVE Record https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurity...
Recommended Actions
- Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
- Use the Pro API to automate enrichment, telemetry, and workflow delivery for VM, SOC, and CTI pipelines.
Known Exploited Vulnerability Sources
Catalogues that list this CVE as a known exploited vulnerability.
Per-source evidence links for KEV attestations are available through the KEVIntel Pro API.
Learn about Pro API access| Source | Added |
|---|---|
| CVE First | 2026-06-01 10:46 UTC |
| CISA | 2026-06-02 14:04 UTC |
No detection artifacts or sensor request patterns are available for this CVE yet.
Check back as sensor telemetry and scanner integrations are updated.
Virtual Patch
Compensating WAF rules to help reduce exposure to this CVE. Rule content and deployable vendor exports are available with KEVIntel Enterprise.
KEVIntel does not currently have a virtual patch for this CVE. When available, KEVIntel virtual patches ship as deployable ModSecurity, Cloudflare, and AWS WAF rules.
Enterprise feature. Virtual patch rule content and deployable vendor exports (ModSecurity, Cloudflare, AWS WAF) are available to KEVIntel Enterprise users.
CVSS Scores
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Exploitation Status
Exploited in the wild
Recorded 2026-06-01 10:46:29 UTC · CVE
Weaknesses (CWE)
-
Improper Input Validation
Timeline
Key exploitation, disclosure, scanner coverage, and KEV attestation events for this CVE.
-
14:04 UTC about 2 months ago14:04 UTC · about 2 months ago
Added to CISA KEV
Listed in the CISA Known Exploited Vulnerabilities catalog
-
10:46 UTC about 2 months ago10:46 UTC · about 2 months ago
Added to KEVIntel KEV Feed
High-confidence, third-party attested exploitation
-
16:47 UTC 7 months ago16:47 UTC · 7 months ago
CVE published
Vulnerability disclosed publicly
-
19:15 UTC almost 2 years ago19:15 UTC · almost 2 years ago
CVE ID reserved
Identifier reserved by the CNA
Automate This Intelligence with the Pro API
Confidence scoring, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.
Pro API Example
GET /api/v2/pro/kevs/CVE-2025-20393
{
"cve_id": "CVE-2025-20393",
"title": "Cisco Secure Email Gateway and Cisco Secure Email and Web Manager Remote Comm...",
"affected_vendor": "Cisco",
"affected_product": "Cisco Secure Email, Cisco Secure Email and Web Manager",
"affected_versions": [
{ "vendor": "...", "product": "...", "status": "affected", "display_label": "..." }
],
"confidence": "Confirmed",
"cvss_score": 10.0,
"epss_score": 0.2906,
"exploit_status": {
"exploited_in_the_wild": true,
"active_exploitation_observed": false
},
"sensor_telemetry": { "...": "Pro API fields" },
"proof_of_concepts": [ "..." ],
"scanner_integrations": [ "..." ]
}