CVE-1999-1306 — HIGH severity vulnerability (Cisco IOS 9.1 and earlier does not properly handle extended)
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.
| CVE ID | CVE-1999-1306 |
|---|---|
| Severity | HIGH |
| CVSS score | 7.5 |
| CVSS vector | AV:N/AC:L/Au:N/C:P/I:P/A:P |
| CWE | NVD-CWE-Other |
| Status | Modified |
| Published | 1992-12-10 |
| Last modified | 2026-04-16 |
| 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. |
| Source | NIST National Vulnerability Database |
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