CVE-2002-2053: n/a vulnerability

CVE-2002-2053: The design of the Hot Standby Routing Protocol (HSRP), as implemented on Cisco IOS 12.1, when using IRPAS,...

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.

UnknownCVSS not scoredNot KEV-listedUpdatedSep 16, 2024, 20:48 UTC (UTC+00:00)

Security readout for executives and security teams

This CVE describes a denial-of-service condition in Cisco IOS 12.1 HSRP behavior. A crafted routing scenario can trigger a loop and consume router CPU. The business impact is availability: affected gateway redundancy infrastructure may become unstable or unreachable. Exposure appears limited to Cisco IOS 12.1 environments using HSRP where an attacker can influence routing or introduce conflicting router behavior on the relevant network. The bundle does not provide precise affected versions, configurations, or patch status. Prioritize if legacy Cisco IOS 12.1 routers still support critical gateway redundancy. Otherwise, urgency is mainly discovery and retirement planning because evidence and fix details are incomplete. Mitigation focus: Identify any Cisco IOS 12.1 devices using HSRP.; Check Cisco guidance for fixed versions or configuration mitigations.; Limit HSRP participation to trusted network segments..

Prepared: Jun 29, 2026, 19:05 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Jul 14, 2005, 04:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

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1Source links

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CVE List V5 sourceCVE List V5

Affected products

Products and packages named in the record

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Weakness

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