{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-20323 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-20323 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-20323 is a high-severity authentication bypass vulnerability in Cisco Secure Firewall Management Center (FMC), published on 16 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-20323 and fix it if it is affected.\n\nWhat it is: CVE-2026-20323 is a high-severity authentication bypass vulnerability in Cisco Secure Firewall Management Center (FMC), published on 16 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-20323 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-2026-20323/ (Markdown: https://insights.sbomify.com/CVE-2026-20323/index.md)","id":"CVE-2026-20323","markdown":"https://insights.sbomify.com/CVE-2026-20323/index.md","name":"CVE-2026-20323","record":{"aliases":["GHSA-f2cp-mvp8-7wp4"],"analysis":{"component_type":"network_device","fix_type":"patch","impacts":["privilege_escalation","code_execution"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Cisco firewall management","requires_auth":"none","summary":"An adjacent attacker can bypass authentication in Cisco FMC/FTD sftunnel using a crafted TLS certificate to gain root access.","user_interaction":"not_required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"cisco","cpe":[],"cvss":{"score":8.3,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-295","name":"Improper Certificate Validation"}],"description":"A vulnerability in the sftunnel inter-device communication protocol of Cisco Secure FMC Software and Cisco Secure FTD Software could allow an unauthenticated, adjacent attacker to impersonate the peer device and obtain access at the level of the\u0026nbsp;manager role, which is equivalent to root.\r\n\r\nThis vulnerability is due to improper management of the TLS certificate for the sftunnel management connection. An attacker could exploit this vulnerability by connecting to the sftunnel port using a crafted TLS certificate. A successful exploit could allow the attacker to become a registered sftunnel peer with root access.\r\nNote: The attack is successful only if the sftunnel connection is down or the attack can disrupt the sftunnel connection long enough to execute the attack.","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":"Auth bypass in Cisco Secure Firewall Management Center (FMC)","id":"CVE-2026-20323","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"auth_bypass","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"Cisco Secure Firewall Management Center sftunnel Root Arbitrary Code Exectution Vulnerability","id":"CVE-2026-20324"},"packages":[],"prev":{"headline":"Cisco Nexus Dashboard Software Security Hardening Release September 2026 - Improper Access Control","id":"CVE-2026-20322"},"products":["Cisco Secure Firewall Management Center (FMC)","Cisco Secure Firewall Threat Defense (FTD) Software"],"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":"2026-09-17","vendors":["Cisco"]},"summary":"An adjacent attacker can bypass authentication in Cisco FMC/FTD sftunnel using a crafted TLS certificate to gain root access.","url":"https://insights.sbomify.com/CVE-2026-20323/"}