{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-20290 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-20290 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-20290 is a medium-severity denial of service vulnerability in Cisco Secure Firewall Threat Defense (FTD) Software, published on 16 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-20290 and fix it if it is affected.\n\nWhat it is: CVE-2026-20290 is a medium-severity denial of service vulnerability in Cisco Secure Firewall Threat Defense (FTD) Software, published on 16 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-20290 in the wild and no public exploit code.\n\nAffected product: Cisco Secure Firewall Threat Defense (FTD) Software. 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-2026-20290/ (Markdown: https://insights.sbomify.com/CVE-2026-20290/index.md)","id":"CVE-2026-20290","markdown":"https://insights.sbomify.com/CVE-2026-20290/index.md","name":"CVE-2026-20290","record":{"aliases":["GHSA-xxfc-5fpg-3fhq"],"analysis":{"component_type":"network_device","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Cisco FTD Snort 2","requires_auth":"none","summary":"An unauthenticated remote attacker can cause a denial of service by sending a crafted SSL connection request to the Snort 2 Detection Engine.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"cisco","cpe":[],"cvss":{"score":5.8,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L","version":"3.1"},"cwes":[{"id":"CWE-805","name":"Buffer Access with Incorrect Length Value"}],"description":"A vulnerability in SSL/TLS certificate parsing in the Snort 2 Detection Engine of Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause the Snort 2 Detection Engine to restart.\r\n\r\nThis vulnerability is due to incomplete validation of the SSL certificate. An attacker could exploit this vulnerability by sending a crafted SSL connection setup request to be parsed by Snort 2. A successful exploit could allow the attacker to cause the Snort 2 Detection Engine to restart unexpectedly, resulting in a denial of service (DoS) condition.","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 Threat Defense Software Snort 2 SSL/TLS Denial of Service Vulnerability","id":"CVE-2026-20290","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"Multiple Cisco Products Snort 3 Software Hardening Release: October 2026","id":"CVE-2026-20291"},"packages":[],"prev":{"headline":"Cisco RoomOS Logging Subsystem Information Disclosure Vulnerability","id":"CVE-2026-20289"},"products":["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":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-09-17","vendors":["Cisco"]},"summary":"An unauthenticated remote attacker can cause a denial of service by sending a crafted SSL connection request to the Snort 2 Detection Engine.","url":"https://insights.sbomify.com/CVE-2026-20290/"}