CVE-2021-20860

moderate-risk
Published 2021-12-01

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.

Do I need to act?

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0.09% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
8
CVSS 8.8/10 High
NETWORK / LOW complexity

Affected Products (14)

Wrc-1167Gst2 Firmware
Wrc-1167Gst2A Firmware
Wrc-1167Gst2H Firmware
Wrc-2533Gs2-B Firmware
Wrc-2533Gs2-W Firmware
Wrc-1750Gs Firmware
Wrc-1750Gsv Firmware
Wrc-1900Gst Firmware
Wrc-2533Gst Firmware
Wrc-2533Gst2 Firmware
Wrc-2533Gsta Firmware
Wrc-2533Gst2Sp Firmware
Wrc-2533Gst2-G Firmware
Edwrc-2533Gst2 Firmware

Affected Vendors

Elecom

References (4)

Third Party Advisory https://jvn.jp/en/jp/JVN88993473/index.html
Vendor Advisory https://www.elecom.co.jp/news/security/20211130-01/
Third Party Advisory https://jvn.jp/en/jp/JVN88993473/index.html
Vendor Advisory https://www.elecom.co.jp/news/security/20211130-01/
48
/ 100
moderate-risk
Severity 30/34 · Critical
Exploitability 0/34 · Minimal
Exposure 18/34 · Moderate