CVE-2026-5264

| EUVD-2026-21214 HIGH
2026-04-09 [email protected] GHSA-w5qh-hw7x-9w39
8.3
CVSS 4.0
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CVSS Vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
X

Lifecycle Timeline

3
Analysis Generated
Apr 09, 2026 - 22:22 vuln.today
EUVD ID Assigned
Apr 09, 2026 - 22:22 euvd
EUVD-2026-21214
CVE Published
Apr 09, 2026 - 22:16 nvd
HIGH 8.3

Tags

Heap Overflow Buffer Overflow

Description

Heap buffer overflow in DTLS 1.3 ACK message processing. A remote attacker can send a crafted DTLS 1.3 ACK message that triggers a heap buffer overflow.

Analysis

Heap buffer overflow in wolfSSL DTLS 1.3 ACK message handler allows unauthenticated remote attackers to achieve integrity and availability impacts via crafted network packets. The vulnerability triggers memory corruption during ACK message processing in DTLS 1.3 sessions, enabling potential arbitrary code execution or denial of service. …

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Remediation

Within 24 hours: Identify all systems running wolfSSL with DTLS 1.3 enabled and document versions in use; assess network exposure of affected services. Within 7 days: Implement network segmentation and access controls to restrict DTLS 1.3 traffic to trusted sources only; contact wolfSSL for patch timeline and interim guidance. …

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Priority Score

42
Low Medium High Critical
KEV: 0
EPSS: +0.2
CVSS: +42
POC: 0

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CVE-2026-5264 vulnerability details – vuln.today
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