What is CVE-2026-6536?

CVE-2026-6536 is a medium-severity vulnerability in Wireshark, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 5.5/10. Published 2026-04-30.

How severe is CVE-2026-6536?

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

Vulnerability in Wireshark

CVE-2026-6536

DLMS/COSEM protocol dissector infinite loop in Wireshark 4.6.0 to 4.6.4

EPSS: 0.000 (0.2th percentile) — read the EPSS interpretation.

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.

Affected products

Wireshark
Wireshark Foundation — versions 4.6.0

Weakness classification (CWE)

CWE-835 — Loop with Unreachable Exit Condition (Infinite Loop)

References

cve@gitlab.com (Vendor Advisory)
GitLab Issue #21065 (issue-tracking, Exploit, permissions-required, Issue Tracking)
134c704f-9b21-4f2e-91b3-4a467353bcc0 (Exploit, Issue Tracking, Third Party Advisory)

Frequently asked questions

What is CVE-2026-6536?: CVE-2026-6536 is a medium-severity vulnerability in Wireshark, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 5.5/10. Published 2026-04-30.
How severe is CVE-2026-6536?: Medium severity. CVSS v3 base score is 5.5 out of 10.