CVE-2026-76887: CWE-122: Heap-based Buffer Overflow in Wireshark Foundation Wireshark
Crash in the Wireshark dissection engine in 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18 allows denial of service
AI Analysis
Technical Summary
This vulnerability involves a heap-based buffer overflow in the Wireshark dissection engine present in versions 4.4.0 to 4.4.18 and 4.6.0 to 4.6.7. The flaw can be triggered to cause a crash, leading to denial of service. The CVSS 3.1 base score is 3.1, indicating low severity, with network attack vector, high attack complexity, no privileges required, user interaction required, and impact limited to availability.
Potential Impact
Exploitation of this vulnerability results in denial of service by crashing the Wireshark application. There is no impact on confidentiality or integrity according to the CVSS vector. No known exploits are reported in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, users should exercise caution when analyzing untrusted network traffic and consider limiting user interaction with potentially malicious captures.
CVE-2026-76887: CWE-122: Heap-based Buffer Overflow in Wireshark Foundation Wireshark
Description
Crash in the Wireshark dissection engine in 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18 allows denial of service
CVSS v3.1
Score 3.1low
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 involves a heap-based buffer overflow in the Wireshark dissection engine present in versions 4.4.0 to 4.4.18 and 4.6.0 to 4.6.7. The flaw can be triggered to cause a crash, leading to denial of service. The CVSS 3.1 base score is 3.1, indicating low severity, with network attack vector, high attack complexity, no privileges required, user interaction required, and impact limited to availability.
Potential Impact
Exploitation of this vulnerability results in denial of service by crashing the Wireshark application. There is no impact on confidentiality or integrity according to the CVSS vector. No known exploits are reported in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, users should exercise caution when analyzing untrusted network traffic and consider limiting user interaction with potentially malicious captures.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitLab
- Date Reserved
- 2026-08-19T22:34:39.934Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a8633c7acd9273b49b8ad4c
Added to database: 08/19/2026, 22:52:55 UTC
Last enriched: 09/18/2026, 23:34:31 UTC
Last updated: 10/02/2026, 11:37:51 UTC
Views: 71
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