CVE-2021-20852
MEDIUM
6.8
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.?
Get instant alerts when new vulnerabilities affect ELECOM LAN routers - before attackers find them.
Real-time alertsTrack your software stackFree plan available
Severity
MEDIUM6.8
Exploit prediction
EPSS 0.5%
Description
Buffer overflow vulnerability in 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 an arbitrary OS command 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
- ADJACENT_NETWORK
- Complexity
- LOW
- Privileges
- HIGH
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- HIGH
- Integrity
- HIGH
- Availability
- HIGH
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-120
Get alerted
Stop reading CVE feeds looking for your own stack
Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.
Free plan, no card