CVE-2016-0762: The Realm implementations in Apache Tomcat versions 9.0.0.M1 to 9.0.0.M9, 8.5.0 to 8.5.4, 8.0.0.RC1 to 8.0....

Security readout for executives and security teams

CVE-2016-0762 is a timing side channel in Apache Tomcat authentication realms. An attacker could compare response timing to infer whether a username exists. This does not directly expose passwords or grant access, but it can make targeted password attacks more efficient. The default LockOutRealm makes exploitation harder. Exposure is most relevant where affected Tomcat versions provide externally reachable login flows using Realm-based authentication. Internal-only administrative applications are lower risk but still exposed to credential-harvesting attempts by authenticated network users or insiders. Treat this as a credential-risk reducer, not an emergency remote-code-execution issue. Prioritize internet-facing Tomcat applications and systems with sensitive accounts. Patch through normal vulnerability management unless local exposure, weak monitoring, or known username secrecy requirements raise business impact. Mitigation focus: Inventory Tomcat versions against the affected ranges listed by Apache and CVE records.; Apply Apache, Debian, or Red Hat Tomcat updates from the cited vendor advisories.; Keep LockOutRealm enabled unless vendor guidance says otherwise..

Prepared

Jun 12, 2026, 21:41 UTC (UTC+00:00)

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