Answer in brief
CVE-2026-20131 records a High severity vulnerability in Cisco Secure Firewall Management Center Software Remote Code Execution Vulnerability. The current sources mark it as known exploited. The current feed maps Cisco/Cisco Secure Firewall Management Center (FMC) (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. Known-exploitation status makes exposure review time-sensitive. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Cisco/Cisco Secure Firewall Management Center (FMC) (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Cisco/Cisco Secure Firewall Management Center (FMC)generic | 7.0.0 || 7.0.0.1 || 7.0.1 || 7.1.0 || 6.4.0.13 || 7.0.1.1 || 6.4.0.14 || 7.1.0.1 || 7.0.2 || 6.4.0.15 || 7.2.0 || 7.0.2.1 || 7.0.3 || 7.1.0.2 || 7.2.0.1 || 7.0.4 || 7.2.1 || 7.0.5 || 6.4.0.16 || 7.3.0 || 7.2.2 || 7.3.1 || 7.2.3 || 7.1.0.3 || 7.2.3.1 || 7.2.4 || 7.0.6 || 7.2.4.1 || 7.2.5 || 7.3.1.1 || 7.4.0 || 6.4.0.17 || 7.0.6.1 || 7.2.5.1 || 7.4.1 || 7.2.6 || 7.4.1.1 || 7.0.6.2 || 6.4.0.18 || 7.2.7 || 7.2.5.2 || 7.3.1.2 || 7.2.8 || 7.6.0 || 7.4.2 || 7.2.8.1 || 7.0.6.3 || 7.4.2.1 || 7.2.9 || 7.0.7 || 7.7.0 || 7.4.2.2 || 7.2.10 || 7.6.1 || 7.4.2.3 || 7.0.8 || 7.6.2 || 7.7.10 || 7.2.10.1 || 7.0.8.1 || 7.6.2.1 || 7.2.10.2 || 7.7.10.1 || 7.4.2.4 || 7.4.3 || 7.7.11 || 7.6.4 || 10.0.0 || 7.4.4 || 7.4.5 | Not reported |
Published upstream
Mar 4, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 14, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
May 24, 2026
Added to CISA KEV
Mar 19, 2026
Evidence: source:kev:kev:kev:recordA vulnerability in the web-based management interface of Cisco Secure Firewall Management Center (FMC) Software could allow an unauthenticated, remote attacker to execute arbitrary Java code as root on an affected device. This vulnerability is due to insecure deserialization of a user-supplied Java byte stream. An attacker could exploit this vulnerability by sending a crafted serialized Java object to the web-based management interface of an affected device. A successful exploit could allow the attacker to execute arbitrary code on the device and elevate privileges to root. Note: If the FMC management interface does not have public internet access, the attack surface that is associated with this vulnerability is reduced.
Quoted source text, attributed separately from HOL analysis.