What’s Vulnerable › Vulnerabilities

CVE-2026-0959: Out-of-bounds Write in Wireshark

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-01-14 · updated 2026-06-17
• Weakness: CWE-787

Description

IEEE 802.11 protocol dissector crash in Wireshark 4.6.0 to 4.6.2 and 4.4.0 to 4.4.12 allows denial of service

Affected products

• Wireshark Foundation Wireshark: from 4.4.0 before 4.4.13; from 4.6.0 before 4.6.3 — fixed in 4.4.13, 4.6.3

How to fix

Upgrade to a fixed version: Wireshark Foundation Wireshark 4.4.13, 4.6.3. Check the vendor advisory for mitigations.

References

• https://gitlab.com/wireshark/wireshark/-/issues/20939
• https://www.wireshark.org/security/wnpa-sec-2026-02.html

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