What’s Vulnerable › Vulnerabilities

CVE-2026-9759: NULL Pointer Dereference in Wireshark

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-27 · updated 2026-06-17
• Weakness: CWE-476

Description

ROHC protocol dissector crash in Wireshark 4.6.0 to 4.6.5 and 4.4.0 to 4.4.15 allows denial of service

Affected products

• Wireshark Foundation Wireshark: from 4.4.0 before 4.4.16; from 4.6.0 before 4.6.6 — fixed in 4.4.16, 4.6.6

How to fix

Upgrade to a fixed version: Wireshark Foundation Wireshark 4.4.16, 4.6.6. Check the vendor advisory for mitigations.

References

• https://gitlab.com/wireshark/wireshark/-/work_items/21243
• https://www.wireshark.org/security/wnpa-sec-2026-51.html

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