CVE-2026-5393

| EUVD-2026-21231 MEDIUM
2026-04-09 wolfSSL GHSA-f4w6-5m9p-28hw
6.3
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:L/VA:L/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 - 23:31 vuln.today
EUVD ID Assigned
Apr 09, 2026 - 23:31 euvd
EUVD-2026-21231
CVE Published
Apr 09, 2026 - 23:02 nvd
MEDIUM 6.3

Tags

Information Disclosure Buffer Overflow Wolfssl

Description

Dual-Algorithm CertificateVerify out-of-bounds read. When processing a dual-algorithm CertificateVerify message, an out-of-bounds read can occur on crafted input. This can only occur when --enable-experimental and --enable-dual-alg-certs is used when building wolfSSL.

Analysis

Out-of-bounds read in wolfSSL's dual-algorithm CertificateVerify processing allows remote attackers to trigger information disclosure and data integrity violations through crafted input, but only when the library is compiled with both --enable-experimental and --enable-dual-alg-certs flags. The vulnerability affects wolfSSL versions before 5.9.1 and requires network access with low attack complexity, though the attack triggering mechanism involves a passive timing or state condition (AT:P). …

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Priority Score

32
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +32
POC: 0

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CVE-2026-5393 vulnerability details – vuln.today
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