{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2025-20191 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2025-20191 yet. Limit exposure of the affected software until one is available.","what":"CVE-2025-20191 is a high-severity denial of service vulnerability in Cisco NX-OS Software, published on 7 May 2025. 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-2025-20191 and fix it if it is affected.\n\nWhat it is: CVE-2025-20191 is a high-severity denial of service vulnerability in Cisco NX-OS Software, published on 7 May 2025. 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-2025-20191 in the wild and no public exploit code.\n\nAffected product: Cisco NX-OS 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-2025-20191/ (Markdown: https://insights.sbomify.com/CVE-2025-20191/index.md)","id":"CVE-2025-20191","markdown":"https://insights.sbomify.com/CVE-2025-20191/index.md","name":"CVE-2025-20191","record":{"aliases":["GHSA-vx24-6mq3-c5cq"],"analysis":{"component_type":"network_device","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Cisco network OS","requires_auth":"none","summary":"An unauthenticated adjacent attacker can cause a denial of service by sending crafted DHCPv6 packets to affected Cisco network devices.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"cisco","cpe":[],"cvss":{"score":7.4,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-805","name":"Buffer Access with Incorrect Length Value"}],"description":"A vulnerability in the Switch Integrated Security Features (SISF) of Cisco IOS Software, Cisco IOS XE Software, Cisco NX-OS Software, and Cisco Wireless LAN Controller (WLC) AireOS Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on an affected device.\r\n\r\nThis vulnerability is due to the incorrect handling of DHCPv6 packets. An attacker could exploit this vulnerability by sending a crafted DHCPv6 packet to an affected device. A successful exploit could allow the attacker to cause the 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":"Multiple Cisco Products Denial of Service Vulnerability","id":"CVE-2025-20191","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"denial_of_service","year":"2025"},"n_packages":0,"n_references":1,"next":{"headline":"Denial of service in Cisco IOS XE Software","id":"CVE-2025-20192"},"packages":[],"prev":{"headline":"Missing authorization in Cisco IOS XE Software","id":"CVE-2025-20190"},"products":["Cisco NX-OS Software","Cisco Wireless LAN Controller (WLC)"],"published":"2025-05-07","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":"2025-05-07","vendors":["Cisco"]},"summary":"An unauthenticated adjacent attacker can cause a denial of service by sending crafted DHCPv6 packets to affected Cisco network devices.","url":"https://insights.sbomify.com/CVE-2025-20191/"}