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allow an unauthenticated, remote attacker to execute arbitrary Java code as root on an affected device.\r\n\r\nThis 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.\r\n\r\nNote: If the FMC management interface does not have public internet access, the attack surface that is associated with this vulnerability is reduced.\r\n\r\nCisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.\r\n\r\n\r\n\r\nThis advisory is part of the March 2026 release of the Cisco Secure Firewall ASA, Secure FMC, and Secure FTD Software Security Advisory Bundled Publication. For a complete list of the advisories and links to them, see Cisco Event Response: March 2026 Semiannual Cisco Secure Firewall ASA, Secure FMC, and Secure FTD Software Security Advisory Bundled Publication [\"https://sec.cloudapps.cisco.com/security/center/viewErp.x?alertId\u003dERP-75736\"].","datePublished":"Mar 4, 2026, 4:00:00 PM","dateUpdated":"Mar 25, 2026, 2:21:24 PM","baseScore":0.0,"references":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fmc-rce-NKhnULJh\n","aliases":"CVE-2026-20131\n","source":{"id":10,"name":"csaf_cisco"},"advisoryProduct":[{"id":"3bab72d3-71ed-3dee-92c7-bd89724290fe","product":{"name":"7.7","vendor":{"name":"OpenBSD"}}},{"id":"4f22806f-ae3b-31ae-a8cc-626cf9bc8f87","product":{"name":"7.1","vendor":{"name":"InduSoft"}}},{"id":"8a2d9586-f6e2-36a1-b710-a45f071c756f","product":{"name":"7.0","vendor":{"name":"Automated Logic"}}},{"id":"94833a78-7f56-316a-af63-745ac5ec64cb","product":{"name":"10.0","vendor":{"name":"General Electric (GE)"}}},{"id":"ab3d06a5-735b-330e-8756-12c13d292009","product":{"name":"7.4","vendor":{"name":"AVEVA Software, LLC"}}},{"id":"da5d3dd5-3d5b-3d6e-b609-34287f6a53c0","product":{"name":"7.3","vendor":{"name":"IBM"}}},{"id":"e1d83840-cc9d-3cf4-96cd-b302d825fafd","product":{"name":"7.6","vendor":{"name":"OpenBSD"}}},{"id":"ee42635f-0a34-347c-90e1-fe6d43b7a5e2","product":{"name":"6.4","vendor":{"name":"open source"}}},{"id":"f6fdb3b8-f2e4-36c3-a87c-33f2626b0106","product":{"name":"Cisco Secure Firewall Management Center (FMC) Appliances","vendor":{"name":"Cisco"}}},{"id":"f9ad7ede-f4c6-30d3-b192-c8ed39a79034","product":{"name":"7.2","vendor":{"name":"Advantech"}}}]}},{"id":"4577a57a-3cf3-3580-91b5-bc0dd8726cd0","advisory":{"id":"WID-SEC-W-2026-0610","description":"Cisco Secure Firewall Management Center: Mehrere Schwachstellen","summary":"Ein entfernter, authentisierter Angreifer kann mehrere Schwachstellen in Cisco Secure Firewall Management Center und Cisco Secure Firewall Threat Defense ausnutzen, um Root-Rechte zu erlangen, beliebigen Code mit Root-Rechten auszuführen, SQL-Injection durchzuführen und vertrauliche Daten offenzulegen sowie Daten zu manipulieren.","datePublished":"Mar 4, 2026, 11:00:00 PM","dateUpdated":"Mar 18, 2026, 11:00:00 PM","baseScore":0.0,"references":"https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-0610.json\nhttps://wid.cert-bund.de/portal/wid/securityadvisory?name\u003dWID-SEC-2026-0610\n","aliases":"CVE-2026-20001\nCVE-2026-20002\nCVE-2026-20003\nCVE-2026-20079\nCVE-2026-20131\nCVE-2026-20044\nCVE-2026-20018\n","source":{"id":8,"name":"csaf_certbund"},"advisoryProduct":[{"id":"73cc08fb-0295-3ced-8485-a76b8de000a7","product":{"name":"Cisco Secure Firewall Management Center","vendor":{"name":"Cisco"}}},{"id":"946cf96a-35c8-3830-b044-831e053e8287","product":{"name":"Cisco Secure Firewall Threat Defense","vendor":{"name":"Cisco"}}}]}},{"id":"8a8045a2-284b-3ec3-a71c-bff914b45256","advisory":{"id":"NCSC-2026-0076","description":"Kwetsbaarheden verholpen in Cisco Secure Firewall Management Center","datePublished":"Mar 4, 2026, 8:49:12 PM","dateUpdated":"Sep 12, 2026, 8:52:01 AM","baseScore":0.0,"references":"","aliases":"CVE-2026-20079\nCVE-2026-20131\n","source":{"id":19,"name":"csaf_ncscnl"},"advisoryProduct":[{"id":"70accc96-6938-3660-b928-ca5467b566b1","product":{"name":"Cisco Secure Firewall Management Center (FMC) Appliances","vendor":{"name":"Cisco"}}},{"id":"c53445aa-ca0d-3983-8fd7-80bdef91c03f","product":{"name":"Cisco Secure Firewall Management Center (FMC)","vendor":{"name":"Cisco"}}}]}}]}