CVE-2026-76881: CWE-476: NULL Pointer Dereference in Wireshark Foundation Wireshark
Description
A NULL pointer dereference vulnerability exists in the CMS protocol dissector of Wireshark versions 4.4.0 through 4.4.18 and 4.6.0 through 4.6.7. This flaw can cause the application to crash, resulting in a denial of service condition.
CVSS v3.1
Score 4.7medium
Affected software
Wireshark Foundation
Wireshark
pkg:github/wireshark/wiresharkRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-76881 is a vulnerability in Wireshark's CMS protocol dissector affecting versions 4.4.0 to 4.4.18 and 4.6.0 to 4.6.7. The issue is a NULL pointer dereference (CWE-476) that leads to a crash when processing certain malformed CMS protocol data. This vulnerability can be triggered by an attacker to cause denial of service by crashing the Wireshark application.
Potential Impact
Successful exploitation of this vulnerability results in denial of service due to application crash. There is no impact on confidentiality or integrity. The attack vector is local with high attack complexity and requires user interaction.
Mitigation Recommendations
No official patch or remediation information is provided in the input data. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, avoid processing untrusted CMS protocol data with affected versions of Wireshark.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitLab
- Date Reserved
- 2026-08-19T22:34:09.937Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a8633c7acd9273b49b8ad42
Added to database: 08/19/2026, 22:52:55 UTC
Last enriched: 09/11/2026, 05:48:50 UTC
Last updated: 10/04/2026, 10:02:29 UTC
Views: 49
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