CVE-2021-20090

Katalog CVE

CVSS 9.8 · Critical KEV · sudah dieksploitasi EPSS 100,0%

Kerentanan Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') pada buffalo wsr-2533dhpl2-bk firmware, buffalo wsr-2533dhp3-bk firmware. Skor CVSS 3.1 9.8 (Critical) menurut NVD. Masuk katalog KEV CISA pada 3 November 2021, artinya sudah terbukti dieksploitasi.

Deskripsi (NVD)

A path traversal vulnerability in the web interfaces of Buffalo WSR-2533DHPL2 firmware version <= 1.02 and WSR-2533DHP3 firmware version <= 1.24 could allow unauthenticated remote attackers to bypass authentication.

Rincian

Terbit di NVD

29 April 2021

Terakhir diubah

17 Juni 2026

Status NVD

Analyzed

CVSS 3.1

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

Jenis kelemahan (CWE)

CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

EPSS (30 hari)

100,0% peluang dieksploitasi; lebih tinggi dari 99,9% CVE lain

Known Exploited Vulnerabilities (CISA)

Nama

Arcadyan Buffalo Firmware Path Traversal Vulnerability

Masuk KEV

3 November 2021

Tenggat CISA

17 November 2021 (untuk instansi federal AS)

Ransomware

Belum tercatat

Tindakan wajib

Apply updates per vendor instructions.

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://www.kb.cert.org/vuls/id/914124 advisory pihak ketiga · pemerintah AS
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-20090 pemerintah AS
• https://www.secpod.com/blog/arcadyan-based-routers-and-modems-under-active-exploitation/ exploit · advisory pihak ketiga
• https://www.tenable.com/security/research/tra-2021-13 exploit · advisory pihak ketiga