Cisco Multiple Products Improper Input Validation Vulnerability
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.
- Vendor
- Cisco
- Product
- Multiple Products
- CVSS
- 10.0
- EPSS (exploit probability)
- 32.4%
- Status
- kev
- CISA patch-by (BOD 22-01)
- Added to KEV
Is CVE-2025-20393 being exploited?
Yes. CISA added CVE-2025-20393 to its Known Exploited Vulnerabilities catalog on . CISA only lists a CVE when it has reliable evidence of exploitation in the wild.
FIRST's EPSS model puts the probability of exploitation activity in the next 30 days at 32.4% (scored October 14, 2026).
- CISA KEV[ LISTED ]
- ENISA EUVD (exploited)[ — ]
- CIRCL KEV[ — ]
Catalog snapshot 2026-11-13. Full cross-catalog view: /kev-comparison
CVE-2025-20393 timeline
- Added to CISA KEVsame day as NVD
- Published to NVD
Every event links to its source. Catalog dates are each catalog's own; day offsets count from NVD publication. Data: JSON
What to do
CISA required actionApply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
US federal civilian agencies must remediate by (7 days after listing) under BOD 22-01. Everyone else: that deadline is a sensible upper bound, not a target. Vendor guidance and the NVD record are linked under Source above.
Other Cisco CVEs we track
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|---|---|---|---|---|
| CVE-2026-20320 Cisco BroadWorks Improper Restriction of XML External Entity Reference Vulnerability | [ HIGH ] | 7.5 | 0.8% | |
| CVE-2026-76418 Cisco ASA/FTD SSL VPN Secondary Auth Logic Error Enables Remote DoSwrite-up | [ HIGH ] | 8.6 | 0.8% | |
| CVE-2026-76519 Cisco Secure Email Gateway Relative Path Traversal Vulnerability | [ CRITICAL ] | 9.8 | 6.2% | |
| CVE-2026-76501 Cisco NX-OS SRv6 NGOAM unauthenticated root RCEwrite-up | [ CRITICAL ] | 9.8 | 0.5% | — |
| CVE-2026-76471 Cisco NX-OS NX-API unauthenticated root RCEwrite-up | [ CRITICAL ] | 9.8 | 0.5% | — |
| CVE-2026-76504 Cisco Catalyst SD-WAN Manager Authentication Bypasswrite-up | [ CRITICAL ] | 9.8 | 38.9% | |
| CVE-2026-76460 Cisco Identity Services Engine Incorrect Use of Privileged APIs Vulnerabilitywrite-up | [ CRITICAL ] | 10.0 | 75.6% | |
| CVE-2026-76461 Cisco Secure Email Gateway SQL Injection Vulnerabilitywrite-up | [ CRITICAL ] | 9.8 | 40.2% |