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Vulnerabilities

Vulnerability · CVE-2026-5393

Dual-Algorithm CertificateVerify out-of-bounds read.

Published Apr 10, 2026 · catalog updated Jun 17, 2026 · Dual-Algorithm CertificateVerify out-of-bounds read.

Check if you run it

No confirmed exploitation is on record for CVE-2026-5393. EPSS is 0.31%. Act only if a listed version of Dual-Algorithm CertificateVerify out-of-bounds read. is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Dual-Algorithm CertificateVerify out-of-bounds read.).
  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium6.3
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.31%
Remediation
Not established
Affected products
cpe wolfssl/wolfssl

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe wolfssl/wolfsslversion unspecified

How to fix CVE-2026-5393

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-5393. EPSS is 0.31%. Act only if a listed version of Dual-Algorithm CertificateVerify out-of-bounds read. is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-125: Out-of-bounds Read. EPSS 0.31%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Apr 10, 2026 · NIST NVD

    Detected

    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.

  2. Jun 17, 2026 · NIST NVD

    Updated

    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.

Sources

  • CVE.orgVulnerability recordCVE-2026-5393

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-5393

    30-day exploitation probability 0.3%

    first.org
  • NIST NVDVulnerability recordCVE-2026-5393

    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.

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.