What is CVE-2026-6870?

CVE-2026-6870 is a medium-severity vulnerability in Wireshark, classified under Access of Uninitialized Pointer. CVSS score: 5.5/10. Published 2026-04-30.

How severe is CVE-2026-6870?

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

Vulnerability in Wireshark

CVE-2026-6870

GSM RP protocol dissector crash in Wireshark 4.6.0 to 4.6.4 and 4.4.0 to 4.4.14 allows denial of service

Published 2026-04-30 · 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: 0.001 (2.7th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 3rd percentile — 2.7% 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: 0.001 · change: -0.000

Affected products

Wireshark
Wireshark Foundation — versions 4.6.0, 4.4.0

Weakness classification (CWE)

CWE-824 — Access of Uninitialized Pointer

References

www.wireshark.org/security/wnpa-sec-2026-43.html (Vendor Advisory)
gitlab.com/wireshark/wireshark/-/work_items/21189 (Exploit, Issue Tracking)

Frequently asked questions

What is CVE-2026-6870?: CVE-2026-6870 is a medium-severity vulnerability in Wireshark, classified under Access of Uninitialized Pointer. CVSS score: 5.5/10. Published 2026-04-30.
How severe is CVE-2026-6870?: Medium severity. CVSS v3 base score is 5.5 out of 10.