CVE-2025-20393
high-risk
Published 2025-12-17
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.
Do I need to act?
~
6.6% chance of exploitation in next 30 days
EPSS score — moderate exploit probability
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CISA KEV: actively exploited in the wild
On the Known Exploited Vulnerabilities catalog — federal agencies must patch
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
10
CVSS 10.0/10
Critical
NETWORK
/ LOW complexity
Affected Products (1)
Affected Vendors
References (2)
54
/ 100
high-risk
Severity
33/34 · Critical
Exploitability
16/34 · Moderate
Exposure
5/34 · Minimal