{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-20341 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-20341 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-20341 is a critical unsafe deserialization vulnerability in Cisco Secure Firewall Management Center (FMC), published on 16 Sep 2026. An attacker needs administrator access to exploit it, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-20341 and fix it if it is affected.\n\nWhat it is: CVE-2026-20341 is a critical unsafe deserialization vulnerability in Cisco Secure Firewall Management Center (FMC), published on 16 Sep 2026. An attacker needs administrator access to exploit it, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-20341 in the wild and no public exploit code.\n\nAffected product: Cisco Secure Firewall Management Center (FMC). No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-20341/ (Markdown: https://insights.sbomify.com/CVE-2026-20341/index.md)","id":"CVE-2026-20341","markdown":"https://insights.sbomify.com/CVE-2026-20341/index.md","name":"CVE-2026-20341","record":{"aliases":["GHSA-355g-mjpr-92rq"],"analysis":{"component_type":"server_software","fix_type":"patch","impacts":["privilege_escalation","code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"Cisco Secure Firewall Management Center","requires_auth":"high_privilege","summary":"An authenticated attacker with admin credentials on a managed device can achieve root privileges on Cisco Secure FMC via unsafe deserialization in sftunnel RPCs.","user_interaction":"not_required","vuln_class":"deserialization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"cisco","cpe":[],"cvss":{"score":9.1,"severity":"critical","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-502","name":"Deserialization of Untrusted Data"}],"description":"A vulnerability in the sftunnel inter-device communication protocol of Cisco Secure FMC Software could allow an authenticated, remote attacker to obtain\u0026nbsp;root privileges.\r\n\r\nThis vulnerability is due to unsecured deserialization of untrusted data over the sftunnel management connection. An attacker could exploit this vulnerability by sending crafted sftunnel remote procedure calls (RPCs). A successful exploit could allow the attacker to gain root privileges on a device that is running Cisco Secure FMC Software and its high-availability peer.\r\nTo exploit this vulnerability, the attacker must have valid administrative credentials on a managed Cisco FTD device.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":null,"headline":"Cisco Secure Firewall Management Center Software sftunnel Deserialization Root Command Execution Vulnerability","id":"CVE-2026-20341","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"deserialization","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"Cisco Secure Firewall Management Center Software Low Privileged Arbitrary File Download Vulnerability","id":"CVE-2026-20342"},"packages":[],"prev":{"headline":"Cisco Secure Firewall Management Center Software Deserialization Arbitrary Root Command Execution Vulnerability","id":"CVE-2026-20340"},"products":["Cisco Secure Firewall Management Center (FMC)"],"published":"2026-09-16","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-09-18","vendors":["Cisco"]},"summary":"An authenticated attacker with admin credentials on a managed device can achieve root privileges on Cisco Secure FMC via unsafe deserialization in sftunnel RPCs.","url":"https://insights.sbomify.com/CVE-2026-20341/"}