CVE Catalog

CVE-1999-1306

High
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Elevated risk
1.39%

69th percentile - higher than 69% of all known CVEs

Summary

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.

Risk Assessment

The organization may be exposed to attacks that exploit access filter vulnerabilities, potentially leading to unauthorized access to network resources.

Recommendation

It is recommended to update Cisco IOS to the latest version to mitigate this vulnerability and review and adjust the configuration of IP access lists.

Related vulnerabilities

Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS