{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2025-20340", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2025-20340", "idYear": 2025, "status": "PUBLISHED", "publishedAt": "2025-09-10T16:06:58.467Z", "updatedAt": "2025-09-10T18:31:00.589Z", "importedAt": "2026-10-24T01:57:24.991Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "Cisco IOS XR Address Resolution Protocol Broadcast Storm Vulnerability", "summary": "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. \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.", "affected": [ { "vendor": "Cisco", "product": "Cisco IOS XR Software", "defaultStatus": "unknown", "versions": [ { "version": "6.5.3", "status": "affected" }, { "version": "6.5.29", "status": "affected" }, { "version": "6.5.1", "status": "affected" }, { "version": "6.6.1", "status": "affected" }, { "version": "6.5.2", "status": "affected" }, { "version": "6.5.92", "status": "affected" }, { "version": "6.5.15", "status": "affected" }, { "version": "6.6.2", "status": "affected" }, { "version": "7.0.1", "status": "affected" }, { "version": "6.6.25", "status": "affected" }, { "version": "6.5.26", "status": "affected" }, { "version": "6.6.11", "status": "affected" }, { "version": "6.5.25", "status": "affected" }, { "version": "6.5.28", "status": "affected" }, { "version": "6.5.93", "status": "affected" }, { "version": "6.6.12", "status": "affected" }, { "version": "6.5.90", "status": "affected" }, { "version": "7.0.0", "status": "affected" }, { "version": "7.1.1", "status": "affected" }, { "version": "7.0.90", "status": "affected" }, { "version": "6.6.3", "status": "affected" }, { "version": "6.7.1", "status": "affected" }, { "version": "7.0.2", "status": "affected" }, { "version": "7.1.15", "status": "affected" }, { "version": "7.2.0", "status": "affected" }, { "version": "7.2.1", "status": "affected" }, { "version": "7.1.2", "status": "affected" }, { "version": "6.7.2", "status": "affected" }, { "version": "7.0.11", "status": "affected" }, { "version": "7.0.12", "status": "affected" }, { "version": "7.0.14", "status": "affected" }, { "version": "7.1.25", "status": "affected" }, { "version": "6.6.4", "status": "affected" }, { "version": "7.2.12", "status": "affected" }, { "version": "7.3.1", "status": "affected" }, { "version": "7.1.3", "status": "affected" }, { "version": "6.7.3", "status": "affected" }, { "version": "7.4.1", "status": "affected" }, { "version": "7.2.2", "status": "affected" }, { "version": "6.7.4", "status": "affected" }, { "version": "6.5.31", "status": "affected" }, { "version": "7.3.15", "status": "affected" }, { "version": "7.3.16", "status": "affected" }, { "version": "6.8.1", "status": "affected" }, { "version": "7.4.15", "status": "affected" }, { "version": "6.5.32", "status": "affected" }, { "version": "7.3.2", "status": "affected" }, { "version": "7.5.1", "status": "affected" }, { "version": "7.4.16", "status": "affected" }, { "version": "7.3.27", "status": "affected" }, { "version": "7.6.1", "status": "affected" }, { "version": "7.5.2", "status": "affected" }, { "version": "7.8.1", "status": "affected" }, { "version": "7.6.15", "status": "affected" }, { "version": "7.5.12", "status": "affected" }, { "version": "7.8.12", "status": "affected" }, { "version": "7.3.3", "status": "affected" }, { "version": "7.7.1", "status": "affected" }, { "version": "6.8.2", "status": "affected" }, { "version": "7.3.4", "status": "affected" }, { "version": "7.4.2", "status": "affected" }, { "version": "6.7.35", "status": "affected" }, { "version": "6.9.1", "status": "affected" }, { "version": "7.6.2", "status": "affected" }, { "version": "7.5.3", "status": "affected" }, { "version": "7.7.2", "status": "affected" }, { "version": "6.9.2", "status": "affected" }, { "version": "7.9.1", "status": "affected" }, { "version": "7.10.1", "status": "affected" }, { "version": "7.8.2", "status": "affected" }, { "version": "7.5.4", "status": "affected" }, { "version": "6.5.33", "status": "affected" }, { "version": "7.8.22", "status": "affected" }, { "version": "7.7.21", "status": "affected" }, { "version": "7.9.2", "status": "affected" }, { "version": "7.3.5", "status": "affected" }, { "version": "7.5.5", "status": "affected" }, { "version": "7.11.1", "status": "affected" }, { "version": "7.9.21", "status": "affected" }, { "version": "7.10.2", "status": "affected" }, { "version": "24.1.1", "status": "affected" }, { "version": "7.6.3", "status": "affected" }, { "version": "7.3.6", "status": "affected" }, { "version": "7.5.52", "status": "affected" }, { "version": "7.11.2", "status": "affected" }, { "version": "24.2.1", "status": "affected" }, { "version": "24.1.2", "status": "affected" }, { "version": "24.2.11", "status": "affected" }, { "version": "24.3.1", "status": "affected" }, { "version": "24.4.1", "status": "affected" }, { "version": "24.2.2", "status": "affected" }, { "version": "7.8.23", "status": "affected" }, { "version": "7.11.21", "status": "affected" }, { "version": "24.2.20", "status": "affected" }, { "version": "24.3.2", "status": "affected" }, { "version": "24.4.10", "status": "affected" }, { "version": "6.5.35", "status": "affected" }, { "version": "25.1.1", "status": "affected" }, { "version": "24.4.2", "status": "affected" }, { "version": "24.3.20", "status": "affected" }, { "version": "24.4.15", "status": "affected" }, { "version": "6.5.351", "status": "affected" }, { "version": "24.3.30", "status": "affected" }, { "version": "6.5.352", "status": "affected" }, { "version": "24.4.30", "status": "affected" } ] } ] } } }