What is CVE-2020-11713?

CVE-2020-11713 is a high-severity vulnerability in Wolfssl, classified under Observable Discrepancy. CVSS score: 7.5/10. Published 2020-04-12.

How severe is CVE-2020-11713?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Wolfssl

CVE-2020-11713

wolfSSL 4.3.0 has mulmod code in wc_ecc_mulmod_ex in ecc.c that does not properly resist timing side-channel attacks.

Published 2020-04-12 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.020 (80.1th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 80th percentile — 80.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.020 · newest: 0.020 · change: 0.000

Affected products

Wolfssl — versions 4.3.0

Weakness classification (CWE)

CWE-203 — Observable Discrepancy

References

github.com/wolfSSL/wolfssl/pull/2894/ (Patch, Third Party Advisory)
gist.github.com/pietroborrello/7c5be2d1dc15349c4ffc8671f0aad04f (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2020-11713?: CVE-2020-11713 is a high-severity vulnerability in Wolfssl, classified under Observable Discrepancy. CVSS score: 7.5/10. Published 2020-04-12.
How severe is CVE-2020-11713?: High severity. CVSS v3 base score is 7.5 out of 10.