Medium severity · published Jan 14, 2026
CVE-2026-0959
Out-of-bounds Write in Wireshark
6.5
CVSS
0.2%
EPSS
No
On KEV
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
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 11% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
WI
Wireshark · Wireshark Foundation
4.6.0 before 4.6.3; 4.4.0 before 4.4.13 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-0959
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-0959
Issue Tracking
https://gitlab.com/wireshark/wireshark/-/issues/20939
Vendor Advisory
https://www.wireshark.org/security/wnpa-sec-2026-02.html
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