CVE-2026-15165: CWE-122: Heap-based Buffer Overflow in Wireshark Foundation Wireshark
A heap-based buffer overflow vulnerability exists in Wireshark versions 4.6.0 through 4.6.6 in the TLS ECH decryptor component. This flaw can cause the application to crash, resulting in a denial of service condition. The vulnerability does not impact confidentiality or integrity but affects availability. No official fix or patch information is currently available.
AI Analysis
Technical Summary
CVE-2026-15165 is a heap-based buffer overflow vulnerability (CWE-122) in the TLS ECH decryptor of Wireshark versions 4.6.0 to 4.6.6. Exploitation can cause the application to crash, leading to denial of service. The CVSS 3.1 base score is 5.5 (medium severity) with attack vector local, low attack complexity, no privileges required, user interaction required, and impact limited to availability. There is no vendor advisory or patch information provided, and no known exploits in the wild have been reported.
Potential Impact
Successful exploitation results in a denial of service by crashing the Wireshark application. There is no impact on confidentiality or integrity according to the CVSS vector. The vulnerability requires local access and user interaction to trigger.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, avoid processing untrusted TLS ECH traffic or running Wireshark with elevated privileges. Monitor official Wireshark Foundation communications for updates.
CVE-2026-15165: CWE-122: Heap-based Buffer Overflow in Wireshark Foundation Wireshark
Description
A heap-based buffer overflow vulnerability exists in Wireshark versions 4.6.0 through 4.6.6 in the TLS ECH decryptor component. This flaw can cause the application to crash, resulting in a denial of service condition. The vulnerability does not impact confidentiality or integrity but affects availability. No official fix or patch information is currently available.
CVSS v3.1
Score 5.5medium
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
CVE-2026-15165 is a heap-based buffer overflow vulnerability (CWE-122) in the TLS ECH decryptor of Wireshark versions 4.6.0 to 4.6.6. Exploitation can cause the application to crash, leading to denial of service. The CVSS 3.1 base score is 5.5 (medium severity) with attack vector local, low attack complexity, no privileges required, user interaction required, and impact limited to availability. There is no vendor advisory or patch information provided, and no known exploits in the wild have been reported.
Potential Impact
Successful exploitation results in a denial of service by crashing the Wireshark application. There is no impact on confidentiality or integrity according to the CVSS vector. The vulnerability requires local access and user interaction to trigger.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, avoid processing untrusted TLS ECH traffic or running Wireshark with elevated privileges. Monitor official Wireshark Foundation communications for updates.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitLab
- Date Reserved
- 2026-07-08T20:45:23.874Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a4ebdf4c9d9e3dbe3bf89ff
Added to database: 07/08/2026, 21:15:32 UTC
Last enriched: 07/08/2026, 21:30:00 UTC
Last updated: 07/08/2026, 22:22:36 UTC
Views: 3
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.