December 17, 2025 · Applied Cybernetics Group
CVE-2025-20393 — Cisco Multiple Products
Cisco Multiple Products Improper Input Validation Vulnerability
- Added to KEV
2025-12-17- Federal due date
2025-12-24- Vendor
- Cisco
- Product
- Multiple Products
- EPSS
- 91.3th percentile (score 0.065, as of
2026-06-08) - NVD CVSS v3.1
- —
- Ransomware use
- Unknown
- Upstream
- https://nvd.nist.gov/vuln/detail/CVE-2025-20393
CISA short 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.
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.