How severe is CVE-2021-20856?

CVE-2021-20856 has a severity rating of 5.4 (medium).

Which software versions are affected by CVE-2021-20856?

CVE-2021-20856 affects ELECOM LAN routers with WRH-733GBK firmware v1.02.9 and prior, as well as WRH-733GWH firmware v1.02.9 and prior.

How can an attacker exploit CVE-2021-20856?

An attacker can exploit CVE-2021-20856 by injecting an arbitrary script via unspecified vectors in the affected ELECOM LAN routers.

Are there any available references for CVE-2021-20856?

Yes, you can find more information about CVE-2021-20856 at the following references: [1] [2].

Vulnerability/
CVE-2021-20856

medium

5.4

CWE

1/12/2021

3/8/2024

CVE-2021-20856: XSS

Q: What is CVE-2021-20856?

CVE-2021-20856 is a cross-site scripting vulnerability in ELECOM LAN routers (WRH-733GBK firmware v1.02.9 and prior and WRH-733GWH firmware v1.02.9 and prior) that allows a remote authenticated attacker to inject an arbitrary script.

First published: Wed Dec 01 2021(Updated: )

Cross-site scripting vulnerability in ELECOM LAN routers (WRH-733GBK firmware v1.02.9 and prior and WRH-733GWH firmware v1.02.9 and prior) allows a remote authenticated attacker to inject an arbitrary script 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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Reference Links

Frequently Asked Questions

What is CVE-2021-20856?
CVE-2021-20856 is a cross-site scripting vulnerability in ELECOM LAN routers (WRH-733GBK firmware v1.02.9 and prior and WRH-733GWH firmware v1.02.9 and prior) that allows a remote authenticated attacker to inject an arbitrary script.
How severe is CVE-2021-20856?
CVE-2021-20856 has a severity rating of 5.4 (medium).
Which software versions are affected by CVE-2021-20856?
CVE-2021-20856 affects ELECOM LAN routers with WRH-733GBK firmware v1.02.9 and prior, as well as WRH-733GWH firmware v1.02.9 and prior.
How can an attacker exploit CVE-2021-20856?
An attacker can exploit CVE-2021-20856 by injecting an arbitrary script via unspecified vectors in the affected ELECOM LAN routers.
Are there any available references for CVE-2021-20856?
Yes, you can find more information about CVE-2021-20856 at the following references: [1] [2].

collector/nvd-index
agent/references
agent/type
collector/mitre-cve
source/MITRE
agent/weakness
agent/severity
agent/author
agent/last-modified-date
agent/softwarecombine
agent/tags
agent/first-publish-date
agent/description
agent/event
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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