{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2025-20340 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2025-20340 yet. Limit exposure of the affected software until one is available.","what":"CVE-2025-20340 is a high-severity denial of service vulnerability in Cisco IOS XR Software, published on 10 Sep 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-2025-20340 and fix it if it is affected.\n\nWhat it is: CVE-2025-20340 is a high-severity denial of service vulnerability in Cisco IOS XR Software, published on 10 Sep 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-2025-20340 in the wild and no public exploit code.\n\nAffected product: Cisco IOS XR 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-2025-20340/ (Markdown: https://insights.sbomify.com/CVE-2025-20340/index.md)","id":"CVE-2025-20340","markdown":"https://insights.sbomify.com/CVE-2025-20340/index.md","name":"CVE-2025-20340","record":{"aliases":["GHSA-7xc2-hq29-896q"],"analysis":{"component_type":"network_device","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Cisco IOS XR","requires_auth":"none","summary":"An unauthenticated adjacent attacker can cause a denial of service on Cisco IOS XR devices by sending excessive ARP traffic to the management interface.","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-400","name":"Uncontrolled Resource Consumption"}],"description":"A vulnerability in the Address Resolution Protocol (ARP) implementation of Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to trigger a broadcast storm, leading to a denial of service (DoS) condition on an affected device.\u0026nbsp;\r\n\r\nThis vulnerability is due to how Cisco IOS XR Software processes a high, sustained rate of ARP traffic hitting the management interface. Under certain conditions, an attacker could exploit this vulnerability by sending an excessive amount of traffic to the management interface of an affected device, overwhelming its ARP processing capabilities. A successful exploit could result in degraded device performance, loss of management connectivity, and complete unresponsiveness of the system, leading to 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 XR Address Resolution Protocol Broadcast Storm Vulnerability","id":"CVE-2025-20340","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":"Cisco Catalyst Center Privilege Escalation Vulnerability","id":"CVE-2025-20341"},"packages":[],"prev":{"headline":"Cisco SD-WAN vEdge Software Access Control List Bypass Vulnerability","id":"CVE-2025-20339"},"products":["Cisco IOS XR Software"],"published":"2025-09-10","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":"2025-09-10","vendors":["Cisco"]},"summary":"An unauthenticated adjacent attacker can cause a denial of service on Cisco IOS XR devices by sending excessive ARP traffic to the management interface.","url":"https://insights.sbomify.com/CVE-2025-20340/"}