CVE-2026-5405: CWE-122: Heap-based Buffer Overflow in Wireshark Foundation Wireshark
RDP protocol dissector crash in Wireshark 4.6.0 to 4.6.4 and 4.4.0 to 4.4.14 allows denial of service and possible code execution
AI Analysis
Technical Summary
CVE-2026-5405 is a heap-based buffer overflow vulnerability in the RDP protocol dissector component of Wireshark. It affects Wireshark versions 4.4.0 through 4.4.14 and 4.6.0 through 4.6.4. Exploitation can lead to application crashes (denial of service) and possibly arbitrary code execution. The vulnerability has a CVSS v3.1 base score of 7.8 (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H). Red Hat advisories confirm the issue and provide updated Wireshark packages that remediate the vulnerability.
Potential Impact
Successful exploitation of this vulnerability can cause Wireshark to crash, resulting in denial of service. Additionally, it may allow an attacker to execute arbitrary code with the privileges of the user running Wireshark. The CVSS score of 7.8 indicates a high impact on confidentiality, integrity, and availability.
Mitigation Recommendations
Red Hat has released security updates that fix this vulnerability in Wireshark. Users of affected Red Hat Enterprise Linux versions should apply the provided updates as detailed in the Red Hat advisories (RHSA-2026:26182 and related). Since this is not a cloud service, remediation requires applying these patches. Patch status is confirmed by Red Hat advisories. No alternative mitigations are specified.
CVE-2026-5405: CWE-122: Heap-based Buffer Overflow in Wireshark Foundation Wireshark
Description
RDP protocol dissector crash in Wireshark 4.6.0 to 4.6.4 and 4.4.0 to 4.4.14 allows denial of service and possible code execution
CVSS v3.1
Score 7.8high
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-2026-5405 is a heap-based buffer overflow vulnerability in the RDP protocol dissector component of Wireshark. It affects Wireshark versions 4.4.0 through 4.4.14 and 4.6.0 through 4.6.4. Exploitation can lead to application crashes (denial of service) and possibly arbitrary code execution. The vulnerability has a CVSS v3.1 base score of 7.8 (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H). Red Hat advisories confirm the issue and provide updated Wireshark packages that remediate the vulnerability.
Potential Impact
Successful exploitation of this vulnerability can cause Wireshark to crash, resulting in denial of service. Additionally, it may allow an attacker to execute arbitrary code with the privileges of the user running Wireshark. The CVSS score of 7.8 indicates a high impact on confidentiality, integrity, and availability.
Mitigation Recommendations
Red Hat has released security updates that fix this vulnerability in Wireshark. Users of affected Red Hat Enterprise Linux versions should apply the provided updates as detailed in the Red Hat advisories (RHSA-2026:26182 and related). Since this is not a cloud service, remediation requires applying these patches. Patch status is confirmed by Red Hat advisories. No alternative mitigations are specified.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitLab
- Date Reserved
- 2026-04-02T06:33:26.681Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://access.redhat.com/security/cve/CVE-2026-5405","vendor":"Red Hat"},{"url":"https://access.redhat.com/errata/RHSA-2026:26182","vendor":"Red Hat"},{"url":"https://access.redhat.com/errata/RHSA-2026:20600","vendor":"Red Hat"}]
Threat ID: 69f3e778cbff5d8610b741b2
Added to database: 04/30/2026, 23:36:24 UTC
Last enriched: 07/15/2026, 09:33:12 UTC
Last updated: 07/31/2026, 19:22:59 UTC
Views: 141
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