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Unrated severityNVD Advisory· Published Dec 10, 1992· Updated Jun 16, 2026

CVE-1999-1306

CVE-1999-1306

Description

Cisco IOS 9.1 and earlier does not properly handle extended IP access lists when the IP route cache is enabled and the "established" keyword is set, which could allow attackers to bypass filters.

Affected products

2
  • Cisco Systems, Inc./Cisco iOS2 versions
    cpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*+ 1 more
    • cpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*range: <=9.1
    • (no CPE)range: <=9.1

Patches

Vulnerability mechanics

References

1

News mentions

0

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