What’s Vulnerable › Vulnerabilities

CVE-2021-20860

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-12-01 · updated 2026-06-17
• Weakness: CWE-352

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.

Affected products

• Elecom Edwrc-2533Gst2 Firmware: through 1.25
• Elecom Wrc-1167Gst2 Firmware: through 1.25
• Elecom Wrc-1167Gst2A Firmware: through 1.25
• Elecom Wrc-1167Gst2H Firmware: through 1.25
• Elecom Wrc-1750Gs Firmware: through 1.03
• Elecom Wrc-1750Gsv Firmware: through 2.11
• Elecom Wrc-1900Gst Firmware: through 1.03
• Elecom Wrc-2533Gs2-B Firmware: through 1.52
• Elecom Wrc-2533Gs2-W Firmware: through 1.52
• Elecom Wrc-2533Gst2-G Firmware: through 1.25
• Elecom Wrc-2533Gst2 Firmware: through 1.25
• Elecom Wrc-2533Gst2Sp Firmware: through 1.25
• Elecom Wrc-2533Gst Firmware: through 1.03
• Elecom Wrc-2533Gsta Firmware: through 1.03

References

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

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