CVE-2025-20393
CVSS v3
10
CRITICAL
EPSS Score
32.4 %
exploit probability, as of 2026-10-18
CISA KEV
Yes
known exploited
Exploitation
—
SSVC status
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Affected and fixed versions
Neither OSV.dev nor the vendor advisories we read list affected versions for CVE-2025-20393 yet.
Description
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.
CISA Known Exploited Vulnerability
- Date Added
- 2025-12-17
- Patch Due Date
- 2025-12-24
- Ransomware Use
- Unknown
Technical details
- Published
- 2025-12-17
Frequently asked questions
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