Cisco Multiple Products Improper Input Validation Vulnerability

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• NewsExploited · CISA KEVCisco · Multiple Products

  Cisco Multiple Products Improper Input Validation Vulnerability

  CVE-2025-20393

  Cisco Secure Email Gateway, Secure Email, AsyncOS Software, and Web Manager appliances contains an improper input validation vulnerability that allows threat actors to execute arbitrary commands with root privileges on the underlying operating system of an affected appliance.

  CISA's required action · due 24 Dec 2025 for U.S. federal civilian agencies

  Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

  Cited by CISA: sec.cloudapps.cisco.com · nvd.nist.gov

  Added to KEV 17 Dec 2025 · Source checked 4 Nov 2026, 16:40 UTC · CISA KEV entry

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