CVE-2021-20859 - CVE House
Back to Database
Status published High CVE-2021-20859

ELECOM LAN routers (WRC-1167GST2 firmware v1.25 and prior, WRC-1167GST2A firmware...

Vulnerability Description

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 network-adjacent authenticated attacker to execute an arbitrary OS command via unspecified vectors.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

THREAT MONITOR

Am I Vulnerable?

Launch our assessment wizard to check if your infrastructure is exposed to • CVE-2021-20859

Credits & Attribution

No credits recorded in the NVD database.

References

More from ELECOM CO.,LTD.

View All →
CVE-2025-66271
Clone for Windows provided by ELECOM CO.,LTD. registers a Windows...
High 8.4
CVE-2025-53472
WRC-BE36QS-B and WRC-W701-B contain an improper neutralization of special elements...
High 8.6
CVE-2025-48890
WRH-733GBK and WRH-733GWH contain an improper neutralization of special elements...
Critical 9.3
CVE-2025-46267
Hidden functionality issue exists in WRC-BE36QS-B and WRC-W701-B. If exploited,...
Medium 6.9
CVE-2025-43879
WRH-733GBK and WRH-733GWH contain an improper neutralization of special elements...
Critical 9.3

Affected Vendor

ELECOM CO.,LTD.

View all reports →

Affected Software

ELECOM LAN routers
Vulnerable Versions:
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

Timeline

Official Publish: December 1st, 2021
Last Modified: August 3rd, 2024
Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weaknesses (CWE)

No CWE data available

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.