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CVE-2026-5403

Heap-based Buffer Overflow in Wireshark

Published: Apr 30, 2026Updated: Jun 30, 2026 Sources: CVE List NVD BDUCWE-122
7.8HIGH
NVD MITRE
EPSS Score
0.2%
Top 94.3%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

SBC codec 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

No summary for this CVE yet.

CVSS Vector Breakdown

AV:LAC:LPR:NUI:RS:UC:HI:HA:H
Exploitability
AV:LAttack Vector
Local
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-122CWE-787

Affected Products

wireshark
oss-project·US
wiresharkOn-premDesktop App
Networking Infrastructure / network-management
Wireshark Foundation
oss-projectaka editcap, wireshark
WiresharkOn-premDesktop App
Security Products
Wireshark team
oss-projectaka wireshark network protocol analyzer, wireshark
WiresharkOn-premDesktop App
Security Products

Exploitability

Official Patch Available
Scannable·OpenVAS
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques
Initial Access
Privilege Escalation
View detailed technique mapping

References

https://gitlab.com/wireshark/wireshark/-/issues/21103
gitlab.com
https://www.wireshark.org/security/wnpa-sec-2026-16.html
wireshark.org
https://access.redhat.com/security/cve/CVE-2026-5403
access.redhat.com
and 2 more references View all →
News mentions
Could not load news mentions.

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