CVE-2026-15166: CWE-121: Stack-based Buffer Overflow in Wireshark Foundation Wireshark
A stack-based buffer overflow vulnerability exists in the IEEE 802.11 protocol dissector of Wireshark versions 4.4.0 through 4.4.16 and 4.6.0 through 4.6.6. This flaw can cause the application to crash, resulting in a denial of service condition. The vulnerability has a medium severity rating with a CVSS score of 5.5. No official patch or remediation guidance has been provided yet.
AI Analysis
Technical Summary
CVE-2026-15166 is a stack-based buffer overflow vulnerability in the IEEE 802.11 protocol dissector component of Wireshark Foundation's Wireshark software. It affects versions 4.4.0 to 4.4.16 and 4.6.0 to 4.6.6. The flaw can be triggered to cause a crash of the application, leading to denial of service. The CVSS 3.1 base score is 5.5, indicating medium severity, with attack vector local, low attack complexity, no privileges required, user interaction required, and impact limited to availability. There is no known exploit in the wild and no vendor advisory or patch currently available.
Potential Impact
Successful exploitation causes a denial of service by crashing Wireshark when processing malformed IEEE 802.11 protocol data. There is no confidentiality or integrity impact reported. 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 IEEE 802.11 traffic in affected versions. Monitor official Wireshark Foundation communications for updates.
CVE-2026-15166: CWE-121: Stack-based Buffer Overflow in Wireshark Foundation Wireshark
Description
A stack-based buffer overflow vulnerability exists in the IEEE 802.11 protocol dissector of Wireshark versions 4.4.0 through 4.4.16 and 4.6.0 through 4.6.6. This flaw can cause the application to crash, resulting in a denial of service condition. The vulnerability has a medium severity rating with a CVSS score of 5.5. No official patch or remediation guidance has been provided yet.
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-2026-15166 is a stack-based buffer overflow vulnerability in the IEEE 802.11 protocol dissector component of Wireshark Foundation's Wireshark software. It affects versions 4.4.0 to 4.4.16 and 4.6.0 to 4.6.6. The flaw can be triggered to cause a crash of the application, leading to denial of service. The CVSS 3.1 base score is 5.5, indicating medium severity, with attack vector local, low attack complexity, no privileges required, user interaction required, and impact limited to availability. There is no known exploit in the wild and no vendor advisory or patch currently available.
Potential Impact
Successful exploitation causes a denial of service by crashing Wireshark when processing malformed IEEE 802.11 protocol data. There is no confidentiality or integrity impact reported. 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 IEEE 802.11 traffic in affected versions. Monitor official Wireshark Foundation communications for updates.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitLab
- Date Reserved
- 2026-07-08T20:45:28.864Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a4ebdf4c9d9e3dbe3bf8a03
Added to database: 07/08/2026, 21:15:32 UTC
Last enriched: 07/08/2026, 21:29:56 UTC
Last updated: 07/08/2026, 22:23:09 UTC
Views: 4
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.