AUGUST 5, 2026
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Case File

CVE-2021-29955

MEDIUM · CVSS 5.3 EPSS 1.52%

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-06-24 · Last synced 2026-08-04

CyberRota Analysis

This is a medium severity vulnerability with a CVSS score of 5.3. It affects Firefox.

CVE
CVE-2021-29955
Severity
MEDIUM
CVSS
5.3
EPSS
1.52%
Firefox

Original NVD Description

A transient execution vulnerability, named Floating Point Value Injection (FPVI) allowed an attacker to leak arbitrary memory addresses and may have also enabled JIT type confusion attacks. (A related vulnerability, Speculative Code Store Bypass (SCSB), did not affect Firefox.). This vulnerability affects Firefox ESR < 78.9 and Firefox < 87.

Related CVEs

Other vulnerabilities affecting the same vendor(s)