CVE-2021-23954

Katalog CVE

CVSS 8.8 · High EPSS 1,2%

Kerentanan Access of Resource Using Incompatible Type ('Type Confusion') pada mozilla firefox, mozilla firefox esr +1 lainnya. Skor CVSS 3.1 8.8 (High) menurut NVD.

Deskripsi (NVD)

Using the new logical assignment operators in a JavaScript switch statement could have caused a type confusion, leading to a memory corruption and a potentially exploitable crash. This vulnerability affects Firefox < 85, Thunderbird < 78.7, and Firefox ESR < 78.7.

Rincian

Terbit di NVD

26 Februari 2021

Terakhir diubah

17 Juni 2026

Status NVD

Modified

CVSS 3.1

8.8 (High), sumber NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-843: Access of Resource Using Incompatible Type ('Type Confusion')

EPSS (30 hari)

1,2% peluang dieksploitasi; lebih tinggi dari 67,0% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://bugzilla.mozilla.org/show_bug.cgi?id=1684020 issue tracking · permissions required · advisory vendor
• https://www.mozilla.org/security/advisories/mfsa2021-03/ release notes · advisory vendor
• https://www.mozilla.org/security/advisories/mfsa2021-04/ release notes · advisory vendor
• https://www.mozilla.org/security/advisories/mfsa2021-05/ release notes · advisory vendor