CVE-2026-15171: CWE-476: NULL Pointer Dereference in Wireshark Foundation Wireshark
SSH protocol dissector crash in Wireshark 4.6.0 to 4.6.6 and 4.4.0 to 4.4.16 allows denial of service
AI Analysis
Technical Summary
CVE-2026-15171 is a NULL pointer dereference vulnerability (CWE-476) in the SSH protocol dissector component of Wireshark. It affects Wireshark versions 4.6.0 through 4.6.6 and 4.4.0 through 4.4.16. Exploitation of this vulnerability can cause the application to crash, leading to denial of service. The CVSS 3.1 base score is 5.5, reflecting medium severity with local attack vector, low attack complexity, no privileges required, and user interaction required. There is no vendor advisory or patch information available at this time.
Potential Impact
Successful exploitation causes Wireshark to crash due to a NULL pointer dereference in the SSH dissector, resulting in denial of service. There is no indication of confidentiality or integrity impact. The attack requires local access and user interaction.
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 SSH traffic with affected Wireshark versions and consider using alternative versions or tools if possible.
CVE-2026-15171: CWE-476: NULL Pointer Dereference in Wireshark Foundation Wireshark
Description
SSH protocol dissector crash in Wireshark 4.6.0 to 4.6.6 and 4.4.0 to 4.4.16 allows denial of service
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-2026-15171 is a NULL pointer dereference vulnerability (CWE-476) in the SSH protocol dissector component of Wireshark. It affects Wireshark versions 4.6.0 through 4.6.6 and 4.4.0 through 4.4.16. Exploitation of this vulnerability can cause the application to crash, leading to denial of service. The CVSS 3.1 base score is 5.5, reflecting medium severity with local attack vector, low attack complexity, no privileges required, and user interaction required. There is no vendor advisory or patch information available at this time.
Potential Impact
Successful exploitation causes Wireshark to crash due to a NULL pointer dereference in the SSH dissector, resulting in denial of service. There is no indication of confidentiality or integrity impact. The attack requires local access and user interaction.
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 SSH traffic with affected Wireshark versions and consider using alternative versions or tools if possible.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitLab
- Date Reserved
- 2026-07-08T20:45:53.857Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a4ebdf4c9d9e3dbe3bf8a13
Added to database: 07/08/2026, 21:15:32 UTC
Last enriched: 07/16/2026, 10:09:27 UTC
Last updated: 08/22/2026, 10:52:07 UTC
Views: 78
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