What’s Vulnerable › Vulnerabilities

CVE-2016-6887

• Severity: medium (CVSS 5.9 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2017-01-13 · updated 2026-06-17
• Weakness: CWE-200

Description

The pstm_exptmod function in MatrixSSL 3.8.6 and earlier does not properly perform modular exponentiation, which might allow remote attackers to predict the secret key via a CRT attack.

Affected products

• Inside Secure MatrixSSL: through 3.8.6

References

• http://www.matrixssl.org/blog/releases/matrixssl_3_8_4
• https://blog.fuzzing-project.org/51-Fun-with-Bignums-Crashing-MatrixSSL-and-more.html
• http://www.matrixssl.org/blog/releases/matrixssl_3_8_4
• https://blog.fuzzing-project.org/51-Fun-with-Bignums-Crashing-MatrixSSL-and-more.html

Get alerted when CVE-2016-6887 or the next vulnerability affects your stack