CVE-2025-6433 | Mozilla Firefox up to 139 TLS certificate validation

June 24, 2025 Yanac

A vulnerability, which was classified as problematic, has been found in Mozilla Firefox up to 139. Affected by this issue is some unknown functionality of the component TLS Handler. The manipulation leads to improper certificate validation.

This vulnerability is handled as CVE-2025-6433. The attack may be launched remotely. There is no exploit available.

It is recommended to upgrade the affected component.VulDB Recent EntriesRead More