CVE Watch—

CVE-2020-6820

Mozilla Firefox And Thunderbird Use-After-Free Vulnerability

CVSS

—

Sin CVSS

EPSS

6.3%

p93

KEV

SÍ

3 nov 2021

Exploit Today

0-100

Publicado: — · Última mod.: —

EPSS · 30d

6.3%EPSS · 30 días6.3%

2026-06-302026-07-16

Ficha del catálogo KEV

Producto

Mozilla / Firefox and Thunderbird

Vulnerabilidad

Mozilla Firefox And Thunderbird Use-After-Free Vulnerability

Añadido a KEV

3 nov 2021

Remediar antes de

3 may 2022

Uso conocido en ransomware

Descripción resumida

Mozilla Firefox and Thunderbird contain a race condition vulnerability when handling a ReadableStream under certain conditions. The race condition creates a use-after-free vulnerability, causing unspecified impacts.

Acción requerida

Apply updates per vendor instructions.

Notas

https://nvd.nist.gov/vuln/detail/CVE-2020-6820

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