CVE-2026-5406: CWE-674: Uncontrolled Recursion in Wireshark Foundation Wireshark
FC-SWILS protocol dissector crash in Wireshark 4.6.0 to 4.6.4 and 4.4.0 to 4.4.14 allows denial of service
AI Analysis
Technical Summary
This vulnerability, identified as CWE-674 (Uncontrolled Recursion), affects the FC-SWILS protocol dissector in Wireshark versions 4.6.0 through 4.6.4 and 4.4.0 through 4.4.14. When processing crafted packets, the dissector can enter uncontrolled recursion leading to a crash of the Wireshark application, causing denial of service. The CVSS 3.1 base score is 5.5, reflecting a medium severity with local attack vector, low attack complexity, no privileges required, user interaction needed, and impact limited to availability.
Potential Impact
Successful exploitation results in denial of service by crashing Wireshark, disrupting packet analysis activities. There is no impact on confidentiality or integrity. The attack requires local access and user interaction, limiting the scope of exploitation. No known exploits are reported in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the Wireshark Foundation vendor advisory for current remediation guidance. Until a fix is available, users should avoid opening untrusted FC-SWILS protocol packets in affected versions of Wireshark. No official workaround or temporary fix has been provided.
CVE-2026-5406: CWE-674: Uncontrolled Recursion in Wireshark Foundation Wireshark
Description
FC-SWILS protocol dissector crash in Wireshark 4.6.0 to 4.6.4 and 4.4.0 to 4.4.14 allows denial of service
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability, identified as CWE-674 (Uncontrolled Recursion), affects the FC-SWILS protocol dissector in Wireshark versions 4.6.0 through 4.6.4 and 4.4.0 through 4.4.14. When processing crafted packets, the dissector can enter uncontrolled recursion leading to a crash of the Wireshark application, causing denial of service. The CVSS 3.1 base score is 5.5, reflecting a medium severity with local attack vector, low attack complexity, no privileges required, user interaction needed, and impact limited to availability.
Potential Impact
Successful exploitation results in denial of service by crashing Wireshark, disrupting packet analysis activities. There is no impact on confidentiality or integrity. The attack requires local access and user interaction, limiting the scope of exploitation. No known exploits are reported in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the Wireshark Foundation vendor advisory for current remediation guidance. Until a fix is available, users should avoid opening untrusted FC-SWILS protocol packets in affected versions of Wireshark. No official workaround or temporary fix has been provided.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitLab
- Date Reserved
- 2026-04-02T06:33:31.669Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69f2f4e6cbff5d8610970ab3
Added to database: 4/30/2026, 6:21:26 AM
Last enriched: 4/30/2026, 6:51:51 AM
Last updated: 5/1/2026, 5:43:08 AM
Views: 10
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