CVE-2026-76880: CWE-787: Out-of-bounds Write in Wireshark Foundation Wireshark
Description
CVE-2026-76880 is a high-severity vulnerability in Wireshark affecting versions 4.4.0 through 4.4.18 and 4.6.0 through 4.6.7. It involves an out-of-bounds write in the RRC protocol dissector that can cause the application to crash, resulting in a denial of service condition.
CVSS v3.1
Score 7.5high
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 the RRC protocol dissector of Wireshark versions 4.4.0 to 4.4.18 and 4.6.0 to 4.6.7. An out-of-bounds write can be triggered, leading to a crash of the Wireshark application and denial of service. The CVSS 3.1 base score is 7.5, reflecting network attack vector, low attack complexity, no privileges or user interaction required, and impact limited to availability (denial of service).
Potential Impact
Successful exploitation causes Wireshark to crash, resulting in denial of service. There is no impact on confidentiality or integrity. No known exploits are reported in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch links are provided in the available data. Users should monitor Wireshark Foundation advisories for updates and apply patches once available.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitLab
- Date Reserved
- 2026-08-19T22:34:04.934Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a8633c5acd9273b49b8ad02
Added to database: 08/19/2026, 22:52:53 UTC
Last enriched: 09/11/2026, 03:01:49 UTC
Last updated: 10/04/2026, 10:02:29 UTC
Views: 73
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