CVE-2026-5392

| EUVD-2026-21229 LOW
2026-04-09 wolfSSL GHSA-52wm-3mqv-vmmj
2.3
CVSS 4.0

CVSS Vector

CVSS:4.0/AV:A/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
Adjacent
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-2026-21229
CVE Published
Apr 09, 2026 - 23:10 nvd
LOW 2.3

Tags

Information Disclosure Buffer Overflow Wolfssl

Description

Heap out-of-bounds read in PKCS7 parsing. A crafted PKCS7 message can trigger an OOB read on the heap. The missing bounds check is in the indefinite-length end-of-content verification loop in PKCS7_VerifySignedData().

Analysis

Heap out-of-bounds read in wolfSSL versions prior to 5.9.1 allows unauthenticated attackers on an adjacent network to trigger information disclosure via a crafted PKCS7 message that bypasses bounds checking in the indefinite-length end-of-content verification loop. The vulnerability has a low CVSS score of 2.3 due to restricted attack vector (adjacent network only) and limited integrity impact, with no public exploit code identified at time of analysis.

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Priority Score

12
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +12
POC: 0

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CVE-2026-5392 vulnerability details – vuln.today
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