{"id":"CVE-2002-2053","aliases":["EUVD-2002-2032","GHSA-x5gf-75g3-pvq8"],"status":"published","title":"The design of the Hot Standby Routing Protocol (HSRP), as implemented on Cisco IOS 12.1, when...","description":"The design of the Hot Standby Routing Protocol (HSRP), as implemented on Cisco IOS 12.1, when using IRPAS, allows remote attackers to cause a denial of service (CPU consumption) via a router with the same IP address as the interface on which HSRP is running, which causes a loop.","severity":{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.01591,"percentile":0.75835,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2002-12-31T05:00:00Z","modified":"2026-06-16T22:00:33Z","products":[{"vendor":"cisco","product":"ios"}],"references":[{"url":"http://archives.neohapsis.com/archives/bugtraq/2002-06/0027.html","tags":["mailing-list","x_refsource_BUGTRAQ","x_transferred"]},{"url":"http://www.securityfocus.com/bid/4949","tags":["vdb-entry","x_refsource_BID","x_transferred"]},{"url":"http://archives.neohapsis.com/archives/bugtraq/2002-06/0050.html","tags":["mailing-list","x_refsource_BUGTRAQ","x_transferred"]},{"url":"http://www.iss.net/security_center/static/9283.php","tags":["vdb-entry","x_refsource_XF","x_transferred"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2002-2053"},{"url":"https://github.com/advisories/GHSA-x5gf-75g3-pvq8"}],"sources":{"cve":[{"id":"CVE-2002-2053","description":"The design of the Hot Standby Routing Protocol (HSRP), as implemented on Cisco IOS 12.1, when using IRPAS, allows remote attackers to cause a denial of service (CPU consumption) via a router with the same IP address as the interface on which HSRP is running, which causes a loop.","status":"published","published":"2005-07-14T04:00:00Z","modified":"2024-09-16T20:48:00.449Z","updated_at":"2026-11-02T14:33:54.29664Z"}],"euvd":[{"id":"EUVD-2002-2032","description":"The design of the Hot Standby Routing Protocol (HSRP), as implemented on Cisco IOS 12.1, when using IRPAS, allows remote attackers to cause a denial of service (CPU consumption) via a router with the same IP address as the interface on which HSRP is running, which causes a loop.","status":"published","published":"2005-07-14T04:00:00Z","modified":"2024-09-16T20:48:00Z","updated_at":"2026-11-03T00:55:10.854479Z"}],"ghsa":[{"id":"GHSA-x5gf-75g3-pvq8","title":"The design of the Hot Standby Routing Protocol (HSRP), as implemented on Cisco IOS 12.1, when...","description":"The design of the Hot Standby Routing Protocol (HSRP), as implemented on Cisco IOS 12.1, when using IRPAS, allows remote attackers to cause a denial of service (CPU consumption) via a router with the same IP address as the interface on which HSRP is running, which causes a loop.","status":"published","published":"2022-04-30T18:22:24Z","modified":"2023-01-30T05:06:39Z","updated_at":"2026-11-02T14:47:32.377793Z"}],"nvd":[{"id":"CVE-2002-2053","description":"The design of the Hot Standby Routing Protocol (HSRP), as implemented on Cisco IOS 12.1, when using IRPAS, allows remote attackers to cause a denial of service (CPU consumption) via a router with the same IP address as the interface on which HSRP is running, which causes a loop.","status":"published","published":"2002-12-31T05:00:00Z","modified":"2026-06-16T22:00:33.94Z","cvss":[{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:00:43.787686Z"}]}}