CVE-2026-20131CRITICAL 10.0CISA KEVEPSS p97.8%
CVE-2026-20131Cisco Secure Firewall Management Center (FMC) Software and Cisco Security Cloud Control (SCC) Firewall Management Deserialization of Untrusted Data Vulnerability
Cisco / Secure Firewall Management Center (FMC)
Description
Cisco Secure Firewall Management Center (FMC) Software and Cisco Security Cloud Control (SCC) Firewall Management contain a deserialization of untrusted data vulnerability in the web-based management interface that could allow an unauthenticated, remote attacker to execute arbitrary Java code as root on an affected device.
Scoring
| CVSS 3.1 | 10.0 (CRITICAL) |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H |
| EPSS | 27.55% probability of exploitation · percentile 97.8% · 2026-06-18T12:00:27Z |
| Published | 2026-03-04 |
| Last modified | 2026-03-25 |
CISA KEV entry
Added to KEV: 2026-03-19
Underlying weaknesses· 1
References
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fmc-rce-NKhnULJh
- https://aws.amazon.com/blogs/security/amazon-threat-intelligence-teams-identify-interlock-ransomware-campaign-targeting-enterprise-firewalls/
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20131
1
| Type | Target | Confidence | Tier |
|---|---|---|---|
| Weakness | Deserialization of Untrusted Datacwe-502 | 0% | live |
(incoming)1
| Type | Target | Confidence | Tier |
|---|---|---|---|
| KEVEntry | Cisco Secure Firewall Management Center (FMC) Software and Cisco Security Cloud Control (SCC) Firewall Management Deserialization of Untrusted Data Vulnerabilitykev-cve-2026-20131 | 0% | live |
Related by meaning· 6
Nearest entities by semantic similarity across the cs-graph corpus.