What is CVE-2026-19694?

CVE-2026-19694 is a medium-severity vulnerability in Wireshark, classified under Heap-based Buffer Overflow. CVSS score: 4.7/10. Published 2026-08-13.

How severe is CVE-2026-19694?

Medium severity. CVSS v3 base score is 4.7 out of 10.

Buffer overflow in Wireshark

CVE-2026-19694

TTX Logger file parser crash in 4.6.0 to 4.6.7 allows denial of service

Vulnerability class: Buffer Overflow

Published 2026-08-13 · last modified 2026-09-01.

CVSS v3 metric

CVSS v3 base score 4.7 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.001 (2.1th percentile), scored 2026-09-27.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 2nd percentile — 2.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: +0.000

Affected products

Wireshark
Wireshark Foundation — versions 4.6.0

Weakness classification (CWE)

CWE-122 — Heap-based Buffer Overflow

References

www.wireshark.org/security/wnpa-sec-2026-68.html (Vendor Advisory)
gitlab.com/wireshark/wireshark/-/work_items/21389 (Exploit, Mitigation, Vendor Advisory)

Frequently asked questions

What is CVE-2026-19694?: CVE-2026-19694 is a medium-severity vulnerability in Wireshark, classified under Heap-based Buffer Overflow. CVSS score: 4.7/10. Published 2026-08-13.
How severe is CVE-2026-19694?: Medium severity. CVSS v3 base score is 4.7 out of 10.