EUVD-2026-92427

In Progress® Telerik® Fiddler® Classic for Windows, versions prior to v6.0.20262.10021, a time-of-check time-of-use TOCTOU race condition exists in the installation of the HTTPS interception root certificate into the Local Computer certificate store. Fiddler writes the certificate to a temporary...

CVE-2026-77804 Time-of-check Time-of-use (TOCTOU) Race Condition in Root Certificate Installation in Progress® Telerik® Fiddler® Classic

In Progress® Telerik® Fiddler® Classic for Windows, versions prior to v6.0.20262.10021, a time-of-check time-of-use TOCTOU race condition exists in the installation of the HTTPS interception root certificate into the Local Computer certificate store. Fiddler writes the certificate to a temporary...

CVE-2026-77804

In Progress® Telerik® Fiddler® Classic for Windows, versions prior to v6.0.20262.10021 , a time-of-check time-of-use (TOCTOU) race condition exists during the installation of the HTTPS interception root certificate. The software writes a certificate to a user-writable temporary file before launch...

PT-2026-105989

Name of the Vulnerable Software and Affected Versions Progress Telerik Fiddler Classic versions prior to 6.0.20262.10021 Description A time-of-check time-of-use TOCTOU race condition occurs during the installation of the HTTPS interception root certificate into the Local Computer certificate stor...