Improper access control in ELECOM CO. ,LTD. products - CVE-2021-20861

Vulnerability identifier: #VU58444

CSH Severity: Medium

CVSS v4: 8.7 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2021-20861

CWE-ID: CWE-284

Exploitation vector: Adjecent network

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to improper access restrictions in the management screen. A remote attacker on the local network can bypass implemented security restrictions and gain unauthorized access to the application.

WRC-1750GS
WRC-2533GST2
WRC-2533GSTA
WRC-2533GST
WRC-1900GST
WRC-2533GST2SP
WRC-1750GSV
WRC-2533GS2-W
WRC-2533GST2-G
WRC-2533GS2-B
WRC-1167GST2H
EDWRC-2533GST2
WRC-1167GST2A
WRC-1167GST2

Install updates from vendor's website.

WRC-1750GS - update to 1.06
WRC-2533GST2 - update to 1.27
WRC-2533GSTA - update to 1.06
WRC-2533GST - update to 1.06
WRC-1900GST - update to 1.06
WRC-2533GST2SP - update to 1.27
WRC-1750GSV - update to 2.30
WRC-2533GS2-W - update to 1.61
WRC-2533GST2-G - update to 1.27
WRC-2533GS2-B - update to 1.61
WRC-1167GST2H - update to 1.27
EDWRC-2533GST2 - update to 1.27
WRC-1167GST2A - update to 1.27
WRC-1167GST2 - update to 1.27

• https://jvn.jp/en/jp/JVN88993473/index.html
• https://www.elecom.co.jp/news/security/20211130-01/

• Multiple vulnerabilities in multiple ELECOM LAN routers