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Vulnerabilities

Threat intelligence · CVE-2016-6891

MatrixSSL contains multiple vulnerabilities MatrixSSL, version 3.8.5 and earlier, contains heap overflow, out-of-bounds read, and unallocated memory free operation vul…

Published Oct 12, 2016 · the affected product

Last checked Oct 31, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2016-6891. EPSS is 1.86%. Act only if a listed version of the affected product is installed.

Gaps on this record

  • No plain product name is stored. The page cannot tell you which product to check.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Unknown—
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
1.86%
Remediation
Version ranges on file
Affected products
stated named in the record

MatrixSSL contains multiple vulnerabilities MatrixSSL, version 3.8.5 and earlier, contains heap overflow, out-of-bounds read, and unallocated memory free operation vulnerabilities. Description CWE-122: Heap-based Buffer Overflow - CVE-2016-6890 The Subject Alt Name field of X.509 certificates is not properly parsed. A specially crafted certificate may result in a heap-based buffer overflow and arbitrary code executio

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.

  • stated named in the record<= 3.8.5

How to fix CVE-2016-6891

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-2016-6891. EPSS is 1.86%. Act only if a listed version of the affected product is installed.

Which versions are affected?

Compare what you have installed with named in the record <= 3.8.5. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 1.86%. 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.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 12, 2016 · AlienVault OTX

    Detected

    MatrixSSL contains multiple vulnerabilities MatrixSSL, version 3.8.5 and earlier, contains heap overflow, out-of-bounds read, and unallocated memory free operation vulnerabilities. Description CWE-122: Heap-based Buffer Overflow - CVE-2016-6890 The Subject Alt Name field of X.509 certificates is not properly parsed. A specially crafted certificate may result in a heap-based buffer overflow and arb

Sources

References

Freshness

Last verified in this catalog Oct 31, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSOct 31, 2026
  • AlienVault OTXOct 31, 2026