CVEvulnerability

CVE-2021-20864

8.8 HIGH Published 2021-12-01 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2021-12-01
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
8.8 HIGH — CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0 ([email protected])
8.3 HIGH — AV:A/AC:L/Au:N/C:C/I:C/A:C

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 start the telnet service and execute an arbitrary OS command via unspecified vectors.

Affected configurations

• elecom wrc-1167gst2 firmware (<= 1.25) • elecom wrc-1167gst2a firmware (<= 1.25) • elecom wrc-1167gst2h firmware (<= 1.25) • elecom wrc-2533gs2-b firmware (<= 1.52) • elecom wrc-2533gs2-w firmware (<= 1.52) • elecom wrc-1750gs firmware (<= 1.03) • elecom wrc-1750gsv firmware (<= 2.11) • elecom wrc-1900gst firmware (<= 1.03) • elecom wrc-2533gst firmware (<= 1.03) • elecom wrc-2533gst2 firmware (<= 1.25) • elecom wrc-2533gsta firmware (<= 1.03) • elecom wrc-2533gst2sp firmware (<= 1.25) • elecom wrc-2533gst2-g firmware (<= 1.25) • elecom edwrc-2533gst2 firmware (<= 1.25)

References