CVE-2026-76919: CWE-457: Use of Uninitialized Variable in Wireshark Foundation Wireshark
Description
ESS protocol dissector crash in 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18 allows denial of service
CVSS v3.1
Score 5.3medium
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-457) in Wireshark's ESS protocol dissector allows an attacker to cause a denial of service by triggering a crash due to the use of an uninitialized variable. The affected versions are 4.4.0 up to but not including 4.4.18 and 4.6.0 up to but not including 4.6.8. The CVSS 3.1 base score is 5.3, indicating a medium severity with network attack vector, low attack complexity, no privileges or user interaction required, and impact limited to availability.
Potential Impact
Successful exploitation results in denial of service by crashing the Wireshark application. There is no impact on confidentiality or integrity. No known exploits are reported in the wild.
Mitigation Recommendations
No explicit patch or remediation link is provided in the data. Patch status is not yet confirmed — check the Wireshark Foundation vendor advisory for current remediation guidance. Until a fix is applied, avoid processing untrusted ESS protocol traffic to mitigate risk.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitLab
- Date Reserved
- 2026-08-19T22:44:20.536Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a8633c5acd9273b49b8ad10
Added to database: 08/19/2026, 22:52:53 UTC
Last enriched: 09/18/2026, 23:34:59 UTC
Last updated: 10/04/2026, 10:02:29 UTC
Views: 44
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