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

CVE-2002-1768

CVE-2002-1768

Description

Cisco IOS 11.1 through 12.2, when HSRP support is not enabled, allows remote attackers to cause a denial of service (CPU consumption) via randomly sized UDP packets to the Hot Standby Routing Protocol (HSRP) port 1985.

Affected products

6
  • Cisco Systems, Inc./Cisco iOS6 versions
    cpe:2.3:o:cisco:ios:11.1:*:*:*:*:*:*:*+ 5 more
    • cpe:2.3:o:cisco:ios:11.1:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:ios:11.2:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:ios:12.0:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:ios:12.1:*:*:*:*:*:*:*
    • cpe:2.3:o:cisco:ios:12.2:*:*:*:*:*:*:*
    • (no CPE)range: 11.1 <= version <= 12.2

Patches

Vulnerability mechanics

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References

4

News mentions

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