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Wireshark EUVD-2026-26318

| CVE-2026-5402 HIGH
Heap-based Buffer Overflow (CWE-122)
2026-04-30 GitLab
8.8
CVSS 3.1
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CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

8
Patch released
May 01, 2026 - 19:26 nvd
Patch available
Patch available
Apr 30, 2026 - 08:16 EUVD
Analysis Updated
Apr 30, 2026 - 07:27 vuln.today
v2 (cvss_changed)
Re-analysis Queued
Apr 30, 2026 - 07:22 vuln.today
cvss_changed
Analysis Generated
Apr 30, 2026 - 06:46 vuln.today
EUVD ID Assigned
Apr 30, 2026 - 06:30 euvd
EUVD-2026-26318
Analysis Generated
Apr 30, 2026 - 06:30 vuln.today
CVE Published
Apr 30, 2026 - 05:39 nvd
HIGH 8.8

DescriptionNVD

TLS protocol dissector heap overflow in Wireshark 4.6.0 to 4.6.4 allows denial of service and possible code execution

AnalysisAI

Heap overflow in Wireshark 4.6.0 through 4.6.4 TLS protocol dissector enables remote code execution when a user opens a malicious capture file or inspects crafted network traffic. The vulnerability requires user interaction (UI:R) but no authentication, making it exploitable via social engineering. …

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RemediationAI

Within 24 hours: Restrict Wireshark usage to versions 4.4.x or earlier; disable automatic file opening in Wireshark settings. Within 7 days: Inventory all Wireshark deployments (versions 4.6.0-4.6.4) across the organization; issue security bulletin to users warning against opening capture files from untrusted sources. …

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Vendor StatusVendor

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EUVD-2026-26318 vulnerability details – vuln.today

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