🛡️ CVE-2026-5407 — wireshark

🟡 CVSS 5.5 — Medium ⚠️ Exploit Public CWE-835 NVD

5.5

CVSS Score

0 Low4 Medium7 High9 Critical10

Description

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

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs no privileges on the target. A user must be tricked into taking some action. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity none, availability high.

Weakness class

CVE-2026-5407 is classified as CWE-835: Infinite Loop. A loop condition can never become false for some inputs, hanging the process.

Affected software

CVE-2026-5407 is recorded against 1 package.

wireshark (from 4.6.0 up to 4.6.4)

Timeline and source

Published on 30 April 2026 and last revised on 17 June 2026. A public exploit is known to exist, which raises the urgency of patching considerably. Record sourced from NVD.

References

gitlab.com
www.wireshark.org
gitlab.com

CVE-2026-5407 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Debian Ubuntu

Details

Severity MEDIUM

CVSS Score 5.5

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

CWE CWE-835

Public Exploit ⚠️ Yes

Source NVD

Published 2026-04-30

Updated 2026-08-11

Modified 2026-06-17

Fix URL N/A

Affected Packages

Software	From version	Fixed in
wireshark	4.6.0	4.6.4

References

Exploit, Issue Tracking https://gitlab.com/wireshark/wireshark/-/issues/21073

Vendor Advisory https://www.wireshark.org/security/wnpa-sec-2026-11.html

Issue Tracking, Third Party Advisory https://gitlab.com/wireshark/wireshark/-/work_items/21073

🔗 NVD 🔗 Mitre

Similar Threats

Exploit Protection

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