CVE Watch—

CVE-2020-6820

Mozilla Firefox And Thunderbird Use-After-Free Vulnerability

CVSS

—

Sem CVSS

EPSS

7.1%

p94

KEV

SIM

3 de nov. de 2021

Exploit Today

0-100

Publicado: — · Última mod.: —

EPSS · 30d

7.1%EPSS · 30 dias7.1%

2026-10-082026-11-05

Ficha do catálogo KEV

Produto

Mozilla / Firefox and Thunderbird

Vulnerabilidade

Mozilla Firefox And Thunderbird Use-After-Free Vulnerability

Adicionado ao KEV

3 de nov. de 2021

Corrigir até

3 de mai. de 2022

Uso conhecido em ransomware

Não

Descrição 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.

Ação necessária

Apply updates per vendor instructions.

Notas

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

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