CVE-2026-5404: CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') in Wireshark Foundation Wireshark
A buffer overflow vulnerability exists in the K12 RF5 file parser of Wireshark versions 4.6.0 to 4.6.4 and 4.4.0 to 4.4.14. This flaw can cause the application to crash, resulting in a denial of service.
AI Analysis
Technical Summary
CVE-2026-5404 is a medium severity buffer overflow vulnerability in Wireshark's K12 RF5 file parser affecting versions 4.6.0 through 4.6.4 and 4.4.0 through 4.4.14. The issue arises from copying data without validating input size, leading to a crash and denial of service. The vulnerability requires local access with high attack complexity and user interaction, and it does not impact confidentiality or integrity. No vendor advisory or patch is currently available, and no known exploits have been reported.
Potential Impact
Successful exploitation causes a denial of service by crashing Wireshark when processing crafted K12 RF5 files. There is no impact on confidentiality or integrity. The attack requires local access, high complexity, and user interaction, limiting the risk to denial of service only.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, avoid opening untrusted K12 RF5 files in affected Wireshark versions. Monitor Wireshark vendor channels for updates.
CVE-2026-5404: CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') in Wireshark Foundation Wireshark
Description
A buffer overflow vulnerability exists in the K12 RF5 file parser of Wireshark versions 4.6.0 to 4.6.4 and 4.4.0 to 4.4.14. This flaw can cause the application to crash, resulting in a denial of service.
CVSS v3.1
Score 4.7medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-5404 is a medium severity buffer overflow vulnerability in Wireshark's K12 RF5 file parser affecting versions 4.6.0 through 4.6.4 and 4.4.0 through 4.4.14. The issue arises from copying data without validating input size, leading to a crash and denial of service. The vulnerability requires local access with high attack complexity and user interaction, and it does not impact confidentiality or integrity. No vendor advisory or patch is currently available, and no known exploits have been reported.
Potential Impact
Successful exploitation causes a denial of service by crashing Wireshark when processing crafted K12 RF5 files. There is no impact on confidentiality or integrity. The attack requires local access, high complexity, and user interaction, limiting the risk to denial of service only.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, avoid opening untrusted K12 RF5 files in affected Wireshark versions. Monitor Wireshark vendor channels for updates.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitLab
- Date Reserved
- 2026-04-02T06:33:21.683Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69f3e778cbff5d8610b741ae
Added to database: 4/30/2026, 11:36:24 PM
Last enriched: 5/8/2026, 2:16:58 AM
Last updated: 6/15/2026, 3:04:03 AM
Views: 92
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.