AUGUST 4, 2026
Live Feed
Back to database
Case File

CVE-2021-29980

HIGH · CVSS 8.8 EPSS 1.41% Public Exploit

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-08-17 · Last synced 2026-08-04

CyberRota Analysis

AI analysis pending.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Detected Signals
exploit

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2021-29980
Severity
HIGH
CVSS
8.8
EPSS
1.41%
Firefox

Original NVD Description

Uninitialized memory in a canvas object could have caused an incorrect free() leading to memory corruption and a potentially exploitable crash. This vulnerability affects Thunderbird < 78.13, Thunderbird < 91, Firefox ESR < 78.13, and Firefox < 91.