How severe is CVE-2021-20855?

CVE-2021-20855 has a severity rating of 5.4 (Medium).

Which software versions are affected by CVE-2021-20855?

CVE-2021-20855 affects ELECOM LAN routers with WRH-733GBK firmware versions prior to v1.02.9 and WRH-733GWH firmware versions prior to v1.02.9.

How can a remote attacker exploit CVE-2021-20855?

A remote authenticated attacker can exploit CVE-2021-20855 by injecting an arbitrary script via unspecified vectors.

Are all ELECOM LAN routers vulnerable to CVE-2021-20855?

No, only ELECOM LAN routers with WRH-733GBK firmware and WRH-733GWH firmware versions prior to v1.02.9 are vulnerable to CVE-2021-20855.

Vulnerability/
CVE-2021-20855

medium

5.4

CWE

1/12/2021

3/8/2024

CVE-2021-20855: XSS

Q: What is CVE-2021-20855?

CVE-2021-20855 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 via unspecified vectors.

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-2021-20855?
CVE-2021-20855 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 via unspecified vectors.
How severe is CVE-2021-20855?
CVE-2021-20855 has a severity rating of 5.4 (Medium).
Which software versions are affected by CVE-2021-20855?
CVE-2021-20855 affects ELECOM LAN routers with WRH-733GBK firmware versions prior to v1.02.9 and WRH-733GWH firmware versions prior to v1.02.9.
How can a remote attacker exploit CVE-2021-20855?
A remote authenticated attacker can exploit CVE-2021-20855 by injecting an arbitrary script via unspecified vectors.
Are all ELECOM LAN routers vulnerable to CVE-2021-20855?
No, only ELECOM LAN routers with WRH-733GBK firmware and WRH-733GWH firmware versions prior to v1.02.9 are vulnerable to CVE-2021-20855.

collector/nvd-index
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agent/type
agent/description
agent/event
agent/softwarecombine
agent/first-publish-date
agent/last-modified-date
agent/tags
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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