What is CVE-2019-19960?

CVE-2019-19960 is a medium-severity vulnerability in Wolfssl. CVSS score: 5.3/10. Published 2019-12-25.

How severe is CVE-2019-19960?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Wolfssl

CVE-2019-19960

In wolfSSL before 4.3.0, wc_ecc_mulmod_ex does not properly resist side-channel attacks.

Published 2019-12-25 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.010 (59.9th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 60th percentile — 59.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Wolfssl

References

github.com/wolfSSL/wolfssl/releases/tag/v4.3.0-stable (Third Party Advisory, Release Notes)
github.com/wolfSSL/wolfssl/commit/5ee9f9c7a23f8ed093fe1e42bc540727e96cebb8 (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2019-19960?: CVE-2019-19960 is a medium-severity vulnerability in Wolfssl. CVSS score: 5.3/10. Published 2019-12-25.
How severe is CVE-2019-19960?: Medium severity. CVSS v3 base score is 5.3 out of 10.