VDB-341161 · CVE-2026-0959 · EUVD-2026-2431

Wireshark up to 4.4.12/4.6.2 IEEE 802.11 Protocol Dissector out-of-bounds write

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4.9	$0-$5k	0.00

Summaryinfo

A vulnerability identified as critical has been detected in Wireshark up to 4.4.12/4.6.2. The impacted element is an unknown function of the component IEEE 802.11 Protocol Dissector. This manipulation causes out-of-bounds write. This vulnerability is handled as CVE-2026-0959. The attack can be initiated remotely. There is not any exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Wireshark up to 4.4.12/4.6.2. It has been declared as problematic. Affected by this vulnerability is some unknown functionality of the component IEEE 802.11 Protocol Dissector. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. The CWE definition for the vulnerability is CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect availability. The summary by CVE is:

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

The weakness was released by OSS-Fuzz. The advisory is shared at wireshark.org. This vulnerability is known as CVE-2026-0959 since 01/14/2026. The exploitation appears to be difficult. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 294997 (Wireshark 4.6.x < 4.6.3 Multiple Vulnerabilities), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 4.4.13 or 4.6.3 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (294997), EUVD (EUVD-2026-2431) and CERT Bund (WID-SEC-2026-0116). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Affected

Open Source Wireshark

Productinfo

Type

Packet Analyzer Software

Name

Wireshark

Version

License

open-source

Website

Product: https://www.wireshark.org/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.0
VulDB Meta Temp Score: 4.9

VulDB Base Score: 3.1
VulDB Temp Score: 3.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 6.5
NVD Vector: 🔒

CNA Base Score: 5.3
CNA Vector (GitLab): 🔒

CVSSv2info

AV	AC	Au	C	I	A
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Out-of-bounds write
CWE: CWE-787 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 294997
Nessus Name: Wireshark 4.6.x < 4.6.3 Multiple Vulnerabilities

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Wireshark 4.4.13/4.6.3

Timelineinfo

01/14/2026 Advisory disclosed
01/14/2026 +0 days CVE reserved
01/14/2026 +0 days VulDB entry created
01/23/2026 +9 days VulDB entry last update

Sourcesinfo

Product: wireshark.org

Advisory: wireshark.org
Researcher: OSS-Fuzz
Status: Confirmed

CVE: CVE-2026-0959 (🔒)
GCVE (CVE): GCVE-0-2026-0959
GCVE (VulDB): GCVE-100-341161
EUVD: 🔒
CERT Bund: WID-SEC-2026-0116 - Wireshark: Mehrere Schwachstellen ermöglichen Denial of Service

Entryinfo

Created: 01/14/2026 21:39
Updated: 01/23/2026 04:51
Changes: 01/14/2026 21:39 (65), 01/15/2026 03:33 (1), 01/16/2026 08:34 (7), 01/22/2026 03:38 (11), 01/23/2026 04:51 (2)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.