CVE-2026-20131

Known Exploited Vulnerability Entry External Catalog

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Entry Details

CVE-2026-20131

Confirmed

Yes

2026-03-19 00:00 UTC

Timestamps

2026-03-19

2026-03-19

Scope

KEV entry: Cisco Secure Firewall Management Center (FMC) Software and Cisco Security Cloud Control (SCC) Firewall Management Deserialization of Untrusted Data Vulnerability | Affected: 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. | 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. | Due date: 2026-03-22 | Known ransomware campaign use (KEV): Known | Notes (KEV): https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fmc-rce-NKhnULJh ; https://nvd.nist.gov/vuln/detail/CVE-2026-20131

References
  • {'id': 'CVE-2026-20131', 'url': 'https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2026-20131'}

43d9c7fd-5b2c-448e-93e6-43d61e80822d

405284c2-e461-4670-8979-7fd2c9755a60

2026-03-19 17:00 UTC

2026-03-19 17:00 UTC

Evidence (1)
Type Source Signal Confidence Details GCVE Metadata
vendor_report cisa-kev successful_exploitation 0.80
View details 
{
  "cwes": [
    "CWE-502"
  ],
  "date_added": "2026-03-19",
  "due_date": "2026-03-22",
  "feed": "CISA Known Exploited Vulnerabilities Catalog",
  "knownRansomwareCampaignUse": "Known",
  "product": "Secure Firewall Management Center (FMC)",
  "vendorProject": "Cisco",
  "vulnerabilityName": "Cisco Secure Firewall Management Center (FMC) Software and Cisco Security Cloud Control (SCC) Firewall Management Deserialization of Untrusted Data Vulnerability"
}
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