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Unrated severityNVD Advisory· Published Dec 31, 2002· Updated Jun 16, 2026

CVE-2002-2053

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.

Affected products

2
  • Cisco Systems, Inc./Cisco iOS2 versions
    cpe:2.3:o:cisco:ios:12.1:*:*:*:*:*:*:*+ 1 more
    • cpe:2.3:o:cisco:ios:12.1:*:*:*:*:*:*:*
    • (no CPE)range: = 12.1

Patches

Vulnerability mechanics

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References

4

News mentions

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