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CVE-2025-20393: Cisco Multiple Products Improper Input Validation Vulnerability
Cisco Multiple Products · in CISA KEV since 2025-12-17
2025-12-17added to KEV
2025-12-24federal remediation due date
29.88%EPSS exploit probability (30 days) 98.1th percentile
10 CRITICALCVSS 3.1
Unknownknown ransomware use
0days from NVD publication to KEV
What it is
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 (CISA)
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
| CWE | CWE-20 |
|---|---|
| CVSS vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H |
| NVD published | 2025-12-17 (Analyzed) |
Original records: NVD · CISA KEV · JSON: /api/cve/CVE-2025-20393.json · all KEV CVEs
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Get the full file: Exploited Vulnerabilities Brief – September 2026 ($29): this month's KEV additions ranked by EPSS, ransomware use and due date, ready to hand to a patch team. Checkout by Polar.