CVE-2026-19694 is a heap-based buffer overflow vulnerability in the TTX Logger file parser component of Wireshark, affecting versions 4.6.0 through 4.6.7. This vulnerability can be triggered by processing a specially crafted TTX Logger file, causing the application to crash and leading to denial of service. The CVSS 3.1 base score is 4.7, reflecting a medium severity with local attack vector, high attack complexity, no privileges required, and user interaction needed. There is no indication of confidentiality or integrity impact, only availability is affected.

Successful exploitation results in denial of service by crashing the Wireshark application when parsing malicious TTX Logger files. There is no evidence of data disclosure or modification. The attack requires local access and user interaction, and is complex to execute.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a patch is available, avoid opening untrusted or suspicious TTX Logger files with Wireshark versions 4.6.0 through 4.6.7. Monitor official Wireshark channels for updates and apply any official fixes once released.