CVE-2020-6829

Name: CVE-2020-6829
Creator: NVD / NIST
Published: 2020-10-28T12:15:12.407+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 1.45%

Last modified Jun 17, 2026

CVE-2020-6829 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. When performing EC scalar point multiplication, the wNAF point multiplication algorithm was used; which leaked partial information about the nonce used during signature generation. Given an electro-magnetic trace of a few signature generations, the private key could have been computed. EPSS estimates a 1.45% chance of exploitation in the next 30 days.

Description

When performing EC scalar point multiplication, the wNAF point multiplication algorithm was used; which leaked partial information about the nonce used during signature generation. Given an electro-magnetic trace of a few signature generations, the private key could have been computed. This vulnerability affects Firefox < 80 and Firefox for Android < 80.

Metrics

CVSS 3.1

5.3/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS Probability

1.45%

70.0th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Mozilla	Firefox	< 80.0

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1631583Permissions Required
https://lists.debian.org/debian-lts-announce/2023/02/msg00021.html
https://www.mozilla.org/security/advisories/mfsa2020-36/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2020-39/Vendor Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1631583Permissions Required
https://lists.debian.org/debian-lts-announce/2023/02/msg00021.html
https://www.mozilla.org/security/advisories/mfsa2020-36/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2020-39/Vendor Advisory

Timeline

Published: Oct 28, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-6829?

How severe is CVE-2020-6829?

CVE-2020-6829 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 1.45% probability of exploitation in the next 30 days.

How do I fix CVE-2020-6829?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-6829?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST