{"uuid": "43d9c7fd-5b2c-448e-93e6-43d61e80822d", "vulnerability": {"vulnId": "CVE-2026-20131", "altId": []}, "gcve": {"origin_uuid": "405284c2-e461-4670-8979-7fd2c9755a60", "object_uuid": "43d9c7fd-5b2c-448e-93e6-43d61e80822d"}, "status": {"exploited": true, "status_reason": "confirmed", "status_updated_at": "2026-03-19T00:00:00+00:00"}, "characteristics": {}, "timestamps": {"asserted_at": "2026-03-19T00:00:00Z", "recorded_at": "2026-03-19T17:00:01Z", "first_seen_at": "2026-03-19T00:00:00Z"}, "scope": {"notes": "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"}, "evidence": [{"type": "vendor_report", "source": "cisa-kev", "signal": "successful_exploitation", "confidence": 0.8, "details": {"cwes": ["CWE-502"], "feed": "CISA Known Exploited Vulnerabilities Catalog", "product": "Secure Firewall Management Center (FMC)", "due_date": "2026-03-22", "date_added": "2026-03-19", "vendorProject": "Cisco", "vulnerabilityName": "Cisco Secure Firewall Management Center (FMC) Software and Cisco Security Cloud Control (SCC) Firewall Management Deserialization of Untrusted Data Vulnerability", "knownRansomwareCampaignUse": "Known"}}], "references": [{"id": "CVE-2026-20131", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2026-20131"}]}