CVE-2021-20739

HIGH
8.8
CVSS Score
Published: July 7, 2021 at 07:05 AM UTC
Updated: June 17, 2026 at 03:34 AM UTC
22 products affected across 1 vendorWrc 733FEBK FirmwareWrc F300NF FirmwareWrh 300RD Firmware

Using WRC-300FEBK, WRC-F300NF, WRC-733FEBK, WRH-300RD, WRH-300BK, WRH-300SV, WRH-300WH, WRH-H300WH, WRH-H300BK, WRH-300BK-S, and WRH-300WH-S by ELECOM CO.,LTD.?

Get instant alerts when new vulnerabilities affect WRC-300FEBK, WRC-F300NF, WRC-733FEBK, WRH-300RD, WRH-300BK, WRH-300SV, WRH-300WH, WRH-H300WH, WRH-H300BK, WRH-300BK-S, and WRH-300WH-S - before attackers find them.

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Severity
HIGH8.8
Exploit prediction
EPSS 0.5%

Description

WRC-300FEBK, WRC-F300NF, WRC-733FEBK, WRH-300RD, WRH-300BK, WRH-300SV, WRH-300WH, WRH-H300WH, WRH-H300BK, WRH-300BK-S, and WRH-300WH-S all versions allows an unauthenticated network-adjacent attacker 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.

All versions
elecom-wrc-300febk (same device)
All versions
elecom-wrc-733febk (same device)
All versions
elecom-wrc-f300nf (same device)
All versions
elecom-wrh-300bk (same device)
All versions
elecom-wrh-300bk-s (same device)
All versions
elecom-wrh-300rd (same device)
All versions
elecom-wrh-300sv (same device)
All versions
elecom-wrh-300wh (same device)
All versions
elecom-wrh-300wh-s (same device)
All versions
elecom-wrh-h300bk (same device)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (2)

CVSS

Attack Vector
ADJACENT_NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-78

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