CVE-2021-20856
MEDIUM
5.4
CVSS Score
Published: December 1, 2021 at 02:15 AM UTC
Updated: June 17, 2026 at 03:34 AM UTC
4 products affected across 1 vendorWrh 733GBK FirmwareWrh 733GWH FirmwareWRH-733GBK
Using ELECOM LAN routers by ELECOM CO.,LTD.?
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Severity
MEDIUM5.4
Exploit prediction
EPSS 0.6%
Description
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.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
WRH-733GBK· Elecomdevice
80%All versions
WRH-733GWH· Elecomdevice
80%All versions
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
References (2)
x_refsource_MISCThird Party Advisory
Source: [email protected]
https://jvn.jp/en/jp/JVN88993473/index.htmlx_refsource_MISCVendor Advisory
Source: [email protected]
https://www.elecom.co.jp/news/security/20211130-01/CVSS
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- LOW
- User Interaction
- REQUIRED
- Scope
- CHANGED
- Confidentiality
- LOW
- Integrity
- LOW
- Availability
- NONE
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-79
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