{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-20311 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-20311 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-20311 is a medium-severity denial of service vulnerability in Cisco IOS XE Software, published on 5 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-20311 and fix it if it is affected.\n\nWhat it is: CVE-2026-20311 is a medium-severity denial of service vulnerability in Cisco IOS XE Software, published on 5 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-20311 in the wild and no public exploit code.\n\nAffected product: Cisco IOS XE 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-2026-20311/ (Markdown: https://insights.sbomify.com/CVE-2026-20311/index.md)","id":"CVE-2026-20311","markdown":"https://insights.sbomify.com/CVE-2026-20311/index.md","name":"CVE-2026-20311","record":{"aliases":["GHSA-7wh7-mfpx-74m2"],"analysis":{"component_type":"network_device","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Cisco IOS XE","requires_auth":"low_privilege","summary":"An authenticated low-privilege attacker can cause a denial of service on Cisco IOS XE devices by submitting a malformed certificate to the web UI.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"cisco","cpe":[],"cvss":{"score":6.3,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-126","name":"Buffer Over-read"}],"description":"A vulnerability in the web-based management interface of Cisco IOS XE Software could allow an authenticated, remote attacker with low privileges to cause a denial of service (DoS) condition on an affected device.\r\n\r\nThis vulnerability is due to insufficient error handling in the web-based management interface. An attacker could exploit this vulnerability by authenticating with a malformed certificate. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a 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 IOS XE Software Web UI Denial of Service Vulnerability","id":"CVE-2026-20311","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":"Cisco Catalyst SD-WAN Security Hardening Release - Information Disclosure Vulnerabilities","id":"CVE-2026-20312"},"packages":[],"prev":{"headline":"Cisco SD-WAN Software Security Hardening Release - Improper Link Resolution Before File Access","id":"CVE-2026-20310"},"products":["Cisco IOS XE Software"],"published":"2026-08-05","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":"partial"},"state":"PUBLISHED","updated":"2026-08-05","vendors":["Cisco"]},"summary":"An authenticated low-privilege attacker can cause a denial of service on Cisco IOS XE devices by submitting a malformed certificate to the web UI.","url":"https://insights.sbomify.com/CVE-2026-20311/"}