# CVE-2025-20393

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.

- Page: https://www.vulneraibility.com/cve/CVE-2025-20393
- CVSS: 10.0
- Known exploited: yes, in CISA KEV since 2025-12-17; CISA due date 2025-12-24
- EPSS: 32.39%
- Unvetted proof-of-concept code on GitHub: 5 GitHub proofs of concept (first 2025-12-18)
- CISA SSVC: exploitation active, automatable yes, technical impact total (assessed 2025-12-18)
- Weakness: CWE-20
- Published: 2025-12-17

## Affected versions

- Cisco Cisco Secure Email: affected 14.0.0-698; 13.5.1-277; 13.0.0-392; 14.2.0-620; 13.0.5-007; 13.5.4-038; 14.2.1-020; 14.3.0-032; 15.0.0-104; 15.0.1-030; 15.5.0-048; 15.5.1-055; 15.5.2-018; 16.0.0-050; 15.0.3-002; 16.0.0-054; 15.5.3-022; 16.0.1-017
- Cisco Cisco Secure Email and Web Manager: affected 13.6.2-023; 13.6.2-078; 13.0.0-249; 13.0.0-277; 13.8.1-052; 13.8.1-068; 13.8.1-074; 14.0.0-404; 12.8.1-002; 14.1.0-227; 13.6.1-201; 14.2.0-203; 14.2.0-212; 12.8.1-021; 13.8.1-108; 14.2.0-224; 14.3.0-120; 15.0.0-334; 15.5.1-024; 15.5.1-029; 15.5.2-005; 16.0.0-195; 15.5.3-017; 16.0.1-010; 15.0.1-035; 16.0.2-088

A version outside these ranges is not a statement that it is unaffected.

## References

- [other] https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sma-attack-N9bf4
- [other] https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-20393

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Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.