CVE-2011-3607: Integer overflow in the ap_pregsub function in server/util.c in the Apache HTTP Server 2.0.x through 2.0.64...

Security readout for executives and security teams

This is a legacy Apache HTTP Server flaw that can let a local user gain higher privileges. It matters most on shared or multi-tenant servers where untrusted users can place .htaccess files. Internet requests alone are not enough based on the provided description. Exposure is likely limited to legacy Apache 2.0 or 2.2 deployments, especially shared hosting systems allowing local users or tenants to control .htaccess. Systems without mod_setenvif, without untrusted .htaccess authors, or running vendor-fixed packages are less likely exposed. Treat as high priority only where old Apache and untrusted local users coexist. For fully patched or non-shared environments, priority is lower, but legacy Apache should still be removed because support and security coverage are weak. Mitigation focus: Upgrade Apache using vendor-supported security packages or current supported releases.; Check Red Hat, Ubuntu, HP, Apple, Oracle, or platform vendor advisories for fixed builds.; Disable mod_setenvif if it is not required for the server role..

Prepared

Jun 27, 2026, 17:48 UTC (UTC+00:00)

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