Buffer overflow in Wireshark
CVE-2026-5405
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
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.002 (7.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 8th percentile — 7.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000
Affected products
- Wireshark
- Wireshark Foundation — versions 4.6.0, 4.4.0
Weakness classification (CWE)
References
- www.wireshark.org/security/wnpa-sec-2026-17.html (Vendor Advisory)
- gitlab.com/wireshark/wireshark/-/issues/21105 (issue-tracking, Exploit, permissions-required, Third Party Advisory, Issue Tracking)
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Frequently asked questions
- What is CVE-2026-5405?
- CVE-2026-5405 is a high-severity vulnerability in Wireshark, classified under Heap-based Buffer Overflow. CVSS score: 7.8/10. Published 2026-05-01.
- How severe is CVE-2026-5405?
- High severity. CVSS v3 base score is 7.8 out of 10.