CVE-2021-20855

5.4 mediumEPSS 0.6%

Medium (5.4) in elecom. EPSS 0.6% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

5.4 medium

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

EPSS: 0.6% chance of exploitation in the next 30 days; higher than 48% of CVEs (scores of 2026-10-31)
CWE: CWE-79
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