CVE-1999-1216: Cisco routers 9.17 and earlier allow remote attackers to bypass security restrictions via certain IP source routed packe

Published n/a Updated 2026-08-21T04:30:36.408Z

Summary

Cisco routers 9.17 and earlier allow remote attackers to bypass security restrictions via certain IP source routed packets that should normally be denied using the "no ip source-route" command.

Severity

UNKNOWN

Source Attribution

Source: NVD · Updated: 2026-08-21T04:30:36.408Z · Confidence: high

Impact

Based on CVSS vector: n/a — assess confidentiality, integrity, and availability impact via the official vector documentation.

Affected Software

Fix

Upgrade affected software to the fixed version identified above. Apply vendor patches and monitor advisories before exposed systems go unpatched.

References