What is CVE-2026-76928?

CVE-2026-76928 is a high-severity vulnerability in Wireshark, classified under NULL Pointer Dereference. CVSS score: 7.5/10. Published 2026-08-19.

How severe is CVE-2026-76928?

High severity. CVSS v3 base score is 7.5 out of 10.

NULL pointer dereference in Wireshark

CVE-2026-76928

X.509IF protocol dissector crash in 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18 allows denial of service

Published 2026-08-19 · last modified 2026-08-31.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.003 (22.5th percentile), scored 2026-10-05.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 23rd percentile — 22.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.000

Affected products

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

References

gitlab.com/wireshark/wireshark/-/work_items/21469 (Exploit, Mitigation, Vendor Advisory)
www.wireshark.org/security/wnpa-sec-2026-87.html (Vendor Advisory)

Frequently asked questions

What is CVE-2026-76928?: CVE-2026-76928 is a high-severity vulnerability in Wireshark, classified under NULL Pointer Dereference. CVSS score: 7.5/10. Published 2026-08-19.
How severe is CVE-2026-76928?: High severity. CVSS v3 base score is 7.5 out of 10.