What is CVE-2021-20853?

CVE-2021-20853 is a vulnerability affecting ELECOM LAN routers (WRH-733GBK firmware v1.02.9 and prior and WRH-733GWH firmware v1.02.9 and prior) that allows a network-adjacent attacker with an administrator privilege to execute arbitrary OS commands.

How does CVE-2021-20853 impact ELECOM LAN routers?

CVE-2021-20853 allows a network-adjacent attacker with an administrator privilege to execute arbitrary OS commands on ELECOM LAN routers (WRH-733GBK firmware v1.02.9 and prior and WRH-733GWH firmware v1.02.9 and prior).

What is the severity of CVE-2021-20853?

CVE-2021-20853 has a severity of 6.8 (medium).

How can I check if my ELECOM LAN router is affected by CVE-2021-20853?

Check if your ELECOM LAN router is running WRH-733GBK firmware v1.02.9 and prior or WRH-733GWH firmware v1.02.9 and prior.

Is there a fix for CVE-2021-20853?

Update your ELECOM LAN router's firmware to a version later than v1.02.9 to fix CVE-2021-20853.

Vulnerability/
CVE-2021-20853

medium

6.8

CWE

78 77

1/12/2021

3/8/2024

CVE-2021-20853: OS Command Injection

First published: Wed Dec 01 2021(Updated: )

ELECOM LAN routers (WRH-733GBK firmware v1.02.9 and prior and WRH-733GWH firmware v1.02.9 and prior) allows a network-adjacent attacker with an administrator privilege to execute arbitrary OS commands via unspecified vectors.

Credit: vultures@jpcert.or.jp

Affected Software	Affected Version	How to fix
Elecom Wrh-733gbk Firmware	<=1.02.9
Elecom Wrh-733gbk
Elecom Wrh-733gwh Firmware	<=1.02.9
Elecom Wrh-733gwh

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Frequently Asked Questions

What is CVE-2021-20853?
CVE-2021-20853 is a vulnerability affecting ELECOM LAN routers (WRH-733GBK firmware v1.02.9 and prior and WRH-733GWH firmware v1.02.9 and prior) that allows a network-adjacent attacker with an administrator privilege to execute arbitrary OS commands.
How does CVE-2021-20853 impact ELECOM LAN routers?
CVE-2021-20853 allows a network-adjacent attacker with an administrator privilege to execute arbitrary OS commands on ELECOM LAN routers (WRH-733GBK firmware v1.02.9 and prior and WRH-733GWH firmware v1.02.9 and prior).
What is the severity of CVE-2021-20853?
CVE-2021-20853 has a severity of 6.8 (medium).
How can I check if my ELECOM LAN router is affected by CVE-2021-20853?
Check if your ELECOM LAN router is running WRH-733GBK firmware v1.02.9 and prior or WRH-733GWH firmware v1.02.9 and prior.
Is there a fix for CVE-2021-20853?
Update your ELECOM LAN router's firmware to a version later than v1.02.9 to fix CVE-2021-20853.

collector/nvd-index
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agent/weakness
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agent/description
agent/type
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agent/softwarecombine
agent/first-publish-date
agent/last-modified-date
collector/mitre-cve
source/MITRE
vendor/elecom
canonical/elecom wrh-733gbk firmware
version/elecom wrh-733gbk firmware/1.02.9
canonical/elecom wrh-733gbk
canonical/elecom wrh-733gwh firmware
version/elecom wrh-733gwh firmware/1.02.9
canonical/elecom wrh-733gwh

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