High severity · published Apr 30, 2026
CVE-2026-5405
Heap-based Buffer Overflow in Wireshark
7.8
CVSS
0.2%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 5% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
WI
Wireshark · Wireshark Foundation
4.6.0 before 4.6.5; 4.4.0 before 4.4.15 · source: vendor, NVD
RH
Red Hat Enterprise Linux 10 · Red Hat
All versions, or not specified · source: CISA
RH
Red Hat Enterprise Linux 10.0 Extended Update Support · Red Hat
All versions, or not specified · source: CISA
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-5405
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-5405
Exploit
https://gitlab.com/wireshark/wireshark/-/issues/21105
Vendor Advisory
https://www.wireshark.org/security/wnpa-sec-2026-17.html
access.redhat.com
https://access.redhat.com/errata/RHSA-2026:20600
access.redhat.com
https://access.redhat.com/errata/RHSA-2026:26182
access.redhat.com
https://access.redhat.com/security/cve/CVE-2026-5405
bugzilla.redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=2464273
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