⚠ Actively exploited
Added to CISA KEV on 2025-12-17. Federal agencies required to patch by 2025-12-24. 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..
CVE-2025-20393
Severity
10.0CRITICAL
EPSS
6.6%
top 8.82%
CISA KEV
KEV
Added 2025-12-17
Due 2025-12-24
Exploit
No known exploits
Timeline
PublishedDec 17
KEV addedDec 17
KEV dueDec 24
Latest updateJan 16
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.
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 c…
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:HExploitability: 3.9 | Impact: 6.0