CVE-2026-76886
criticalC12.22 protocol dissector crash in 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18 allows denial of service
Vendor / product: Wireshark — wireshark
C12.22 protocol dissector crash in 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18 allows denial of service
CVSS
9.8
9.8 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Severity source: NVD CVSS v3.1 (nvd@nist.gov)
Timeline (UTC)
Published: 2026-08-19 23:16
Modified: 2026-10-24 13:10
NVD status: Analyzed
Last synced 2 days ago
Verified against the source API 2026-10-27 07:07 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
wireshark / wireshark ≥4.4.0 <4.4.18, ≥4.6.0 <4.6.8
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
Vendor advisory: https://gitlab.com/wireshark/wireshark/-/work_items/21439
Vendor advisory: https://www.wireshark.org/security/wnpa-sec-2026-75.html
Vendor advisory: https://gitlab.com/wireshark/wireshark/-/work_items/21446
Patch / mitigation: https://gitlab.com/wireshark/wireshark/-/work_items/21439
Patch / mitigation: https://gitlab.com/wireshark/wireshark/-/work_items/21446
References
- https://gitlab.com/wireshark/wireshark/-/work_items/21439 cve@gitlab.com
- https://www.wireshark.org/security/wnpa-sec-2026-75.html cve@gitlab.com
- https://gitlab.com/wireshark/wireshark/-/work_items/21446 134c704f-9b21-4f2e-91b3-4a467353bcc0
Data sources
NVD CVE API 2.0 — fetched 2026-10-27 07:07 UTC · record ↗