RCE in Elecom Wrh-733gbk
CVE-2021-20853
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.
Vulnerability class: Command Injection (OS Command Injection)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.004 (35.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 35th percentile — 35.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000
Affected products
- Elecom Wrh-733gbk
- Elecom Wrh-733gbk Firmware
- Elecom Wrh-733gwh
- Elecom Wrh-733gwh Firmware
- Elecom Co.,ltd. Lan Routers — versions WRH-733GBK firmware v1.02.9 and prior and WRH-733GWH firmware v1.02.9 and prior
Weakness classification (CWE)
References
- www.elecom.co.jp/news/security/20211130-01/ (Vendor Advisory)
- jvn.jp/en/jp/JVN88993473/index.html (Third Party Advisory)
Frequently asked questions
- What is CVE-2021-20853?
- CVE-2021-20853 is a medium-severity vulnerability in Elecom Wrh-733gbk, classified under OS Command Injection. CVSS score: 6.8/10. Published 2021-12-01.
- How severe is CVE-2021-20853?
- Medium severity. CVSS v3 base score is 6.8 out of 10.