CVE-2013-1337: Microsoft .NET Framework 4.5 does not properly create policy requirements for custom Windows Communication...

Security readout for executives and security teams

CVE-2013-1337 is an authentication bypass issue in Microsoft .NET Framework 4.5 affecting certain WCF services. In specific password-over-HTTPS custom endpoint authentication scenarios, a remote attacker could query an endpoint without proper authentication. Public source details are limited, so exposure depends on whether an organization runs that WCF configuration. Most likely exposed assets are legacy systems running Microsoft .NET Framework 4.5 that host WCF endpoints using custom authentication with passwords over HTTPS. The provided affected-products field is incomplete, so asset validation is required before scoping remediation. Prioritize this if legacy WCF applications handle sensitive data or are internet-facing. The business risk is unauthorized access to protected service endpoints, but urgency cannot be rated precisely from the provided severity data alone. Mitigation focus: Apply the Microsoft security update referenced by MS13-040 where applicable.; Inventory .NET Framework 4.5 hosts exposing WCF services.; Prioritize internet-facing WCF endpoints using password-based custom authentication..

Prepared

Jun 14, 2026, 22:07 UTC (UTC+00:00)

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