CVE-2026-5392
wolfSSL heap OOB read in PKCS7 SignedData streaming
MEDIUM
5.4
CVSS Score
Published: April 9, 2026 at 11:10 PM UTC
Updated: June 17, 2026 at 10:58 AM UTC
1 product affected across 1 vendorwolfSSL
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Severity
MEDIUM5.4
Exploit prediction
EPSS 0.2%
SSVC
No known exploit
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().
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
References (1)
SSVC — Action Prioritization
SSVCNo known exploitNot automatablePartial impact
SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.
CVSS
- Attack Vector
- ADJACENT_NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- LOW
- Integrity
- NONE
- Availability
- LOW
Vector?
Quick Info
StatusANALYZED
CWE
CWE-125
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