CVE-2016-8671

5.9 MEDIUM 1% exploit odds No fix listed

What it is

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 unspecified vectors. NOTE: this vulnerability exists because of an incomplete fix for CVE-2016-6887.

At a glance

Exploitability: Can be exploited over the network without logging in. High risk of data exposure.
Exploit odds: 1.3% chance of exploitation in the next 30 days (EPSS).
Fix: No patch or advisory is linked yet. Look at mitigations or restrict exposure.

Timeline

2017-01-13 16:59 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-17 00:54 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 1.3% in the next 30 days (EPSS).
Severity: 5.9 MEDIUM (CVSS).
Fix: none linked yet, which raises it.

Details

Published: 2017-01-13 16:59 UTC
Last modified: 2026-06-17 00:54 UTC
Exploit probability: 1.3% · EPSS, next 30 days
Weakness: CWE-200 · Information exposure
Record status: Modified

Affected

Matrixssl ≤ 3.8.6

Attack profile CVSS 3.0 · 5.9

Attack vector: Network
Complexity: High
Privileges needed: None
User interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: None
Availability: None

Raw vector

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2016-8671.md and follow it. Check whether this project is affected by CVE-2016-8671. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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References

NVD record · CVE.org record