CVE-2007-4632: Cisco IOS 12.2E, 12.2F, and 12.2S places a "no login" line into the VTY configuration when an administrator...

Security readout for executives and security teams

This flaw can leave remote terminal access on certain Cisco IOS devices without the expected login prompt. If an affected legacy IOS version is configured in the vulnerable state, an attacker could obtain a terminal session without authenticating. Exposure is most plausible on legacy Cisco IOS devices running 12.2E, 12.2F, or 12.2S with AAA disabled, especially where VTY management access is reachable from untrusted networks. Treat as high priority for legacy Cisco infrastructure because successful exploitation could bypass authentication to management sessions. Focus first on internet-reachable or broadly reachable management planes. Mitigation focus: Review the Cisco advisory for fixed releases and vendor-supported remediation.; Inventory devices running Cisco IOS 12.2E, 12.2F, or 12.2S.; Prioritize devices with AAA disabled or exposed VTY management access..

Prepared

Jun 29, 2026, 03:52 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.