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Case File

CVE-2020-12403

CRITICAL · CVSS 9.1 EPSS 1.54%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-05-27 · Last synced 2026-08-04

CyberRota Analysis

AI analysis pending.

CVE
CVE-2020-12403
Severity
CRITICAL
CVSS
9.1
EPSS
1.54%

Original NVD Description

A flaw was found in the way CHACHA20-POLY1305 was implemented in NSS in versions before 3.55. When using multi-part Chacha20, it could cause out-of-bounds reads. This issue was fixed by explicitly disabling multi-part ChaCha20 (which was not functioning correctly) and strictly enforcing tag length. The highest threat from this vulnerability is to confidentiality and system availability.