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CVE-2026-5392VulnerabilityPublished Updated

PKCS7 SignedData streaming · WolfSSL Heap OOB Read

Affects MicrosoftSource GCVE Database

0

Not known to be exploited.

Data as of 27 Oct 2026, 00:23 UTC

Severity
Unrated

Rated by Threat Radar · No CVSS score from NVD or the CNA

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 2 Apr 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
Microsoft Security Response Center MicrosoftAffected
  • =2.0
  • =3.0
Fixed in–

Description

CVE-2026-5392 is a heap out-of-bounds read vulnerability in the PKCS7 SignedData streaming functionality of wolfSSL. The flaw involves improper memory access that could potentially lead to information disclosure or application instability. The affected versions explicitly include 2.0 and 3.0 of the product. No CVSS score or detailed impact information is provided, and there are no known exploits in the wild. No patch or remediation details are currently available.

References

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