What is CVE-2016-7438?

CVE-2016-7438 is a medium-severity vulnerability in Wolfssl, classified under Cryptographic Issues. CVSS score: 5.5/10. Published 2016-12-13.

How severe is CVE-2016-7438?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Vulnerability in Wolfssl

CVE-2016-7438

The C software implementation of ECC in wolfSSL (formerly CyaSSL) before 3.9.10 makes it easier for local users to discover RSA keys by leveraging cache-bank hit differences.

Vulnerability class: POODLE (CVE-2014-3566)

Published 2016-12-13 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.004 (28.1th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 28th percentile — 28.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Wolfssl

Weakness classification (CWE)

CWE-310 — Cryptographic Issues

References

wolfssl.com/wolfSSL/Blog/Entries/2016/9/26_wolfSSL_3.9.10_Vulnerability_Fixes.h… (Vendor Advisory)
www.securityfocus.com/bid/95066 (vdb-entry)

Frequently asked questions

What is CVE-2016-7438?: CVE-2016-7438 is a medium-severity vulnerability in Wolfssl, classified under Cryptographic Issues. CVSS score: 5.5/10. Published 2016-12-13.
How severe is CVE-2016-7438?: Medium severity. CVSS v3 base score is 5.5 out of 10.