CVE-2026-76920: CWE-787: Out-of-bounds Write in Wireshark Foundation Wireshark
Description
CVE-2026-76920 is an out-of-bounds write vulnerability in the 3gpp phone log file parser of Wireshark versions 4.4.0 to 4.4.18 and 4.6.0 to 4.6.7. This flaw can cause the application to crash, resulting in a denial of service condition. The vulnerability has a medium severity rating with a CVSS score of 4.7.
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
This vulnerability (CWE-787) exists in Wireshark's 3gpp phone log file parser. Specifically, versions 4.4.0 through 4.4.18 and 4.6.0 through 4.6.7 are affected. The flaw allows an out-of-bounds write which can lead to a crash of the application, causing denial of service. The CVSS 3.1 vector indicates the attack requires local access with high attack complexity, no privileges, and user interaction, impacting availability only.
Potential Impact
Successful exploitation causes Wireshark to crash, resulting in denial of service. There is no impact on confidentiality or integrity according to the CVSS vector. No known exploits are reported in the wild.
Mitigation Recommendations
No explicit patch links are provided in the input data. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Users should avoid processing untrusted 3gpp phone log files and monitor vendor communications for official fixes.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitLab
- Date Reserved
- 2026-08-19T22:44:25.534Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a8633c5acd9273b49b8ad12
Added to database: 08/19/2026, 22:52:53 UTC
Last enriched: 09/11/2026, 06:02:41 UTC
Last updated: 10/04/2026, 10:02:29 UTC
Views: 43
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