CVE-2021-20862

Severity: medium (CVSS 4.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-12-01 · updated 2026-06-17

Description

Improper access control vulnerability in ELECOM 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 network-adjacent unauthenticated attacker to bypass access restriction, and to obtain anti-CSRF tokens and change the product's settings via unspecified vectors.

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

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