CVE-2021-20853

6.8 mediumEPSS 0.4%

Medium (6.8) in elecom. EPSS 0.4% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

6.8 medium

CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.4% chance of exploitation in the next 30 days; higher than 37% of CVEs (scores of 2026-10-31)
CWE: CWE-78
Published: 2021-12-01
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

elecom:wrh-733gbk_firmware
elecom:wrh-733gwh_firmware

References

https://jvn.jp/en/jp/JVN88993473/index.html
https://www.elecom.co.jp/news/security/20211130-01/
https://jvn.jp/en/jp/JVN88993473/index.html
https://www.elecom.co.jp/news/security/20211130-01/

Check your stack JSON