CVE-2021-20860 Cross-site request forgery in ELECOM LAN routers

High 8.8 Published 1 Dec 2021 Updated 3 Aug 2024

Remote authenticated attackers can hijack administrator sessions via CSRF, potentially gaining full control of ELECOM LAN routers.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2021-20860?

CVE-2021-20860 is a high-severity vulnerability in ELECOM LAN routers, published on 1 Dec 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

Cross-site request forgery (CSRF) vulnerability in ELECOM LAN routers (WRC-1167GST2 firmware v1.25 and prior, WRC-1167GST2A firmware v1.25 and prior, WRC-1167GST2H firmware v1.25 and prior, WRC-2533GS2-B firmware v1.52 and prior, WRC-2533GS2-W firmware v1.52 and prior, WRC-1750GS firmware v1.03 and prior, WRC-1750GSV firmware v2.11 and prior, WRC-1900GST firmware v1.03 and prior, WRC-2533GST firmware v1.03 and prior, WRC-2533GSTA firmware v1.03 and prior, WRC-2533GST2 firmware v1.25 and prior, WRC-2533GST2SP firmware v1.25 and prior, WRC-2533GST2-G firmware v1.25 and prior, and EDWRC-2533GST2 firmware v1.25 and prior) allows a remote authenticated attacker to hijack the authentication of an administrator via a specially crafted page.

Weakness: CWE-352

Which versions are affected by CVE-2021-20860?

It affects 14 products.

Products include Elecom Edwrc-2533gst2 Firmware, Elecom Wrc-1167gst2 Firmware, Elecom Wrc-1167gst2a Firmware, Elecom Wrc-1167gst2h Firmware, Elecom Wrc-1750gs Firmware, Elecom Wrc-1750gsv Firmware and 8 more.

How do I fix CVE-2021-20860?

No fix has been published for CVE-2021-20860 yet. Limit exposure of the affected software until one is available.

Is CVE-2021-20860 being exploited?

There is no known exploitation of CVE-2021-20860 in the wild and no public exploit code.

Sources

Also known as GHSA-g5f2-2vwc-fg5m.