What is CVE-2025-13945?

CVE-2025-13945 is a medium-severity vulnerability in Wireshark, classified under CWE-1325. CVSS score: 5.5/10. Published 2025-12-03.

How severe is CVE-2025-13945?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Vulnerability in Wireshark

CVE-2025-13945

HTTP3 dissector crash in Wireshark 4.6.0 and 4.6.1 allows denial of service

Published 2025-12-03 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.002 (4.2th percentile), scored 2026-10-19.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 4th percentile — 4.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: -0.000

Affected products

Wireshark
Wireshark Foundation — versions 4.6.0

Weakness classification (CWE)

CWE-1325

References

www.wireshark.org/security/wnpa-sec-2025-07.html (Exploit, Issue Tracking, Vendor Advisory)
gitlab.com/wireshark/wireshark/-/issues/20860 (issue-tracking, Exploit, Patch, permissions-required, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2025-13945?: CVE-2025-13945 is a medium-severity vulnerability in Wireshark, classified under CWE-1325. CVSS score: 5.5/10. Published 2025-12-03.
How severe is CVE-2025-13945?: Medium severity. CVSS v3 base score is 5.5 out of 10.