CVE-2021-4126: mozilla thunderbird

csirt@kutim:~/threat-intel/cve/CVE-2021-4126

CVSS 6.5 · Medium EPSS 0,44%

Kerentanan pada mozilla thunderbird. Skor CVSS 3.1 6.5 (Medium) menurut NVD.

Deskripsi (NVD)

When receiving an OpenPGP/MIME signed email message that contains an additional outer MIME message layer, for example a message footer added by a mailing list gateway, Thunderbird only considered the inner signed message for the signature validity. This gave the false impression that the additional contents were also covered by the digital signature. Starting with Thunderbird version 91.4.1, only the signature that belongs to the top level MIME part will be considered for the displayed status. This vulnerability affects Thunderbird < 91.4.1.

Rincian

Terbit di NVD: 22 Desember 2022
Terakhir diubah: 17 Juni 2026
Status NVD: Modified
CVSS 3.1: 6.5 (Medium), sumber NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N · uraikan di kalkulator
EPSS (30 hari): 0,44% peluang dieksploitasi; lebih tinggi dari 36,8% CVE lain

Produk dan versi terdampak

Vendor	Produk	Versi terdampak
mozilla	thunderbird	Semua versi sebelum 91.4.1

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

https://bugzilla.mozilla.org/show_bug.cgi?id=1732310 issue tracking · permissions required · advisory vendor
https://www.mozilla.org/security/advisories/mfsa2021-55/ advisory vendor

Sumber: NVD · CVE.org · EPSS. Halaman ini disusun otomatis dari data tersebut; pembaruan terakhir 5 Okt 2026, 20:10 WITA. Kalau sistem di Perangkat Daerah memakai produk ini dan butuh bantuan, laporkan lewat kanal pelaporan.