CVE-2025-20393
Act now ● On CISA KEV — actively exploited
Actively exploited — on the CISA KEV list.
CVSS base
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EPSS — probability of exploitation (30 days)
29.9%
98.1th percentile
CISA KEV
Listed
Added 2025-12-17 · patch by 2025-12-24
Weakness / dates
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Published — · modified —
Timeline
- 2025-12-17 — Added to CISA KEV (actively exploited)
- 2025-12-24 — CISA patch-by deadline
Description
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.