CVE-2026-6867

MEDIUM

Published Apr 30, 2026 Modified May 1, 2026 CWE-1325

Description

SMB2 protocol dissector crash in Wireshark 4.6.0 to 4.6.4 and 4.4.0 to 4.4.14 allows denial of service

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CVSS v3.1 Score

5.5

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

EPSS — Exploit Prediction

0.0001

Probability of exploitation

0.01%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-1325 CWE-1325

Affected Products

Vendor	Product	Versions
wireshark	wireshark	4.4.0 — 4.4.14
wireshark	wireshark	4.6.0 — 4.6.4

References

Advisories & Patches

https://www.wireshark.org/security/wnpa-sec-2026-45.html

Exploits

https://gitlab.com/wireshark/wireshark/-/work_items/21191

Frequently Asked Questions

What is CVE-2026-6867? +

SMB2 protocol dissector crash in Wireshark 4.6.0 to 4.6.4 and 4.4.0 to 4.4.14 allows denial of service It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2026-6867? +

CVE-2026-6867 has a CVSS v3.1 score of 5.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0001, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-6867? +

CVE-2026-6867 affects products from wireshark, specifically: wireshark. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-6867? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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