CVE-2026-76920: CWE-787: Out-of-bounds Write in Wireshark Foundation Wireshark
CVE-2026-76920 is a medium severity vulnerability in Wireshark affecting certain versions of the 3gpp phone log file parser. It involves an out-of-bounds write that can cause the application to crash, resulting in a denial of service. The affected versions include 4.6.0 and 4.4.0. There is no confirmed patch or official remediation available at this time.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-76920) is an out-of-bounds write (CWE-787) in the 3gpp phone log file parser component of Wireshark. It affects versions 4.6.0 and 4.4.0, and can be triggered by processing crafted input files, leading to a crash and denial of service. The CVSS v3.1 base score is 4.7, indicating medium severity. The attack vector is local with high attack complexity and requires no privileges but user interaction. No confidentiality or integrity impact is noted, only availability is affected.
Potential Impact
Successful exploitation causes a denial of service by crashing Wireshark when parsing malicious 3gpp phone log files. There is no impact on confidentiality or integrity. The vulnerability requires local access and user interaction, with high attack complexity, limiting the ease of exploitation.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, avoid opening untrusted 3gpp phone log files in the affected versions of Wireshark. Monitor the Wireshark Foundation advisories for updates and apply patches promptly once available.
CVE-2026-76920: CWE-787: Out-of-bounds Write in Wireshark Foundation Wireshark
Description
CVE-2026-76920 is a medium severity vulnerability in Wireshark affecting certain versions of the 3gpp phone log file parser. It involves an out-of-bounds write that can cause the application to crash, resulting in a denial of service. The affected versions include 4.6.0 and 4.4.0. There is no confirmed patch or official remediation available at this time.
CVSS v3.1
Score 4.7medium
Affected software
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 (CVE-2026-76920) is an out-of-bounds write (CWE-787) in the 3gpp phone log file parser component of Wireshark. It affects versions 4.6.0 and 4.4.0, and can be triggered by processing crafted input files, leading to a crash and denial of service. The CVSS v3.1 base score is 4.7, indicating medium severity. The attack vector is local with high attack complexity and requires no privileges but user interaction. No confidentiality or integrity impact is noted, only availability is affected.
Potential Impact
Successful exploitation causes a denial of service by crashing Wireshark when parsing malicious 3gpp phone log files. There is no impact on confidentiality or integrity. The vulnerability requires local access and user interaction, with high attack complexity, limiting the ease of exploitation.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, avoid opening untrusted 3gpp phone log files in the affected versions of Wireshark. Monitor the Wireshark Foundation advisories for updates and apply patches promptly once available.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitLab
- Date Reserved
- 2026-08-19T22:44:25.534Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a8633c5acd9273b49b8ad12
Added to database: 08/19/2026, 22:52:53 UTC
Last enriched: 08/19/2026, 23:09:30 UTC
Last updated: 08/20/2026, 01:55:47 UTC
Views: 5
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