CVE-2020-6829

5.3 mediumEPSS 1.5%

Medium (5.3) in mozilla. EPSS 1.5% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

5.3 medium

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

EPSS: 1.5% chance of exploitation in the next 30 days; higher than 73% of CVEs (scores of 2026-10-31)
Published: 2020-10-28
Modified: 2026-08-19
Record from: the NVD, synced 2026-10-19

Affected

mozilla:firefox
mozilla:firefox_mobile

References

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

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