CVE-2021-20739: OS Command Injection
First published: Wed Jul 07 2021(Updated: )
WRC-300FEBK, WRC-F300NF, WRC-733FEBK, WRH-300RD, WRH-300BK, WRH-300SV, WRH-300WH, WRH-H300WH, WRH-H300BK, WRH-300BK-S, and WRH-300WH-S all versions allows an unauthenticated network-adjacent attacker to execute an arbitrary OS command via unspecified vectors.
Credit: vultures@jpcert.or.jp
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Elecom Wrc-300febk Firmware | ||
| Elecom Wrc-300febk | ||
| Elecom Wrc-f300nf Firmware | ||
| Elecom Wrc-f300nf | ||
| Elecom Wrc-733febk Firmware | ||
| Elecom Wrc-733febk | ||
| Elecom Wrh-300rd Firmware | ||
| Elecom Wrh-300rd | ||
| Elecom Wrh-300bk Firmware | ||
| Elecom Wrh-300bk | ||
| Elecom Wrh-300sv Firmware | ||
| Elecom Wrh-300sv | ||
| Elecom Wrh-300wh Firmware | ||
| Elecom Wrh-300wh | ||
| Elecom Wrh-h300wh Firmware | ||
| Elecom Wrh-h300wh | ||
| Elecom Wrh-h300bk Firmware | ||
| Elecom Wrh-h300bk | ||
| Elecom Wrh-300bk-s Firmware | ||
| Elecom Wrh-300bk-s | ||
| Elecom Wrh-300wh-s Firmware | ||
| Elecom Wrh-300wh-s |
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Reference Links
Frequently Asked Questions
What is CVE-2021-20739?
CVE-2021-20739 is a vulnerability that allows an unauthenticated network-adjacent attacker to execute arbitrary OS commands.
Which devices are affected by CVE-2021-20739?
WRC-300FEBK, WRC-F300NF, WRC-733FEBK, WRH-300RD, WRH-300BK, WRH-300SV, WRH-300WH, WRH-H300WH, WRH-H300BK, WRH-300BK-S, and WRH-300WH-S are affected by CVE-2021-20739.
How severe is CVE-2021-20739?
CVE-2021-20739 has a severity rating of 8.8 (high).
How can an attacker exploit CVE-2021-20739?
An attacker can exploit CVE-2021-20739 by leveraging unspecified vectors to execute arbitrary OS commands.
Where can I find more information about CVE-2021-20739?
You can find more information about CVE-2021-20739 at the following references: [JVNVU94260088](https://jvn.jp/en/vu/JVNVU94260088/index.html) and [Elecom Security Advisory](https://www.elecom.co.jp/news/security/20210706-01/).
- collector/nvd-index
- agent/weakness
- agent/severity
- agent/references
- agent/author
- agent/description
- agent/type
- agent/event
- agent/softwarecombine
- agent/first-publish-date
- agent/last-modified-date
- agent/tags
- collector/mitre-cve
- source/MITRE
- vendor/elecom
- canonical/elecom wrc-300febk firmware
- canonical/elecom wrc-300febk
- canonical/elecom wrc-f300nf firmware
- canonical/elecom wrc-f300nf
- canonical/elecom wrc-733febk firmware
- canonical/elecom wrc-733febk
- canonical/elecom wrh-300rd firmware
- canonical/elecom wrh-300rd
- canonical/elecom wrh-300bk firmware
- canonical/elecom wrh-300bk
- canonical/elecom wrh-300sv firmware
- canonical/elecom wrh-300sv
- canonical/elecom wrh-300wh firmware
- canonical/elecom wrh-300wh
- canonical/elecom wrh-h300wh firmware
- canonical/elecom wrh-h300wh
- canonical/elecom wrh-h300bk firmware
- canonical/elecom wrh-h300bk
- canonical/elecom wrh-300bk-s firmware
- canonical/elecom wrh-300bk-s
- canonical/elecom wrh-300wh-s firmware
- canonical/elecom wrh-300wh-s