CVE-2021-34861: dlink dap-2020 firmware

csirt@kutim:~/threat-intel/cve/CVE-2021-34861

CVSS 8.8 · High EPSS 0,82%

Kerentanan Stack-based Buffer Overflow pada dlink dap-2020 firmware. Skor CVSS 3.1 8.8 (High) menurut NVD.

Deskripsi (NVD)

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of D-Link DAP-2020 1.01rc001 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the webproc endpoint, which listens on TCP port 80 by default. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-12104.

Rincian

Terbit di NVD: 25 Oktober 2021
Terakhir diubah: 17 Juni 2026
Status NVD: Modified
CVSS 3.1: 8.8 (High), sumber NVD
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H · uraikan di kalkulator
Jenis kelemahan (CWE): CWE-121: Stack-based Buffer Overflow
EPSS (30 hari): 0,82% peluang dieksploitasi; lebih tinggi dari 56,1% CVE lain

Produk dan versi terdampak

Vendor	Produk	Versi terdampak
dlink	dap-2020 firmware	Semua versi hingga 1.01

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10201 patch · advisory vendor
https://www.zerodayinitiative.com/advisories/ZDI-21-977/ advisory pihak ketiga · vdb entry

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.