CVE-2022-21173

Hidden functionality vulnerability in ELECOM LAN routers (WRH-300BK3 firmware v1.05 and earlier, WRH-300WH3 firmware v1.05 and earlier, WRH-300BK3-S firmware v1.05 and earlier, WRH-300DR3-S firmware v1.05 and earlier, WRH-300LB3-S firmware v1.05 and earlier, WRH-300PN3-S firmware v1.05 and earlier, WRH-300WH3-S firmware v1.05 and earlier, and WRH-300YG3-S firmware v1.05 and earlier) allows an attacker on the adjacent network to execute an arbitrary OS command via unspecified vectors.

Published: 2022-02-08 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2022-21173 is rated Moderate Risk (47.7/100): CVSS High severity, with low exploitation likelihood (EPSS 0.44%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2022-21173

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.13% 0.44% +0.31%
2 2025-03-30 0.46% 0.13% -0.33%
3 2025-03-29 — 0.46% —

Full EPSS history (5 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2022-21173

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.8 3.1 HIGH
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:A)
Attacker has to be nearby on the network—same office, same link, that vibe—not the whole wide internet.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 5.9 [email protected]
8.3 2.0 HIGH
AV:A/AC:L/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:A)
Requires access to an adjacent network segment.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 6.5 10.0 [email protected]

Weakness enumeration for CVE-2022-21173

Affected software / configurations for CVE-2022-21173

Vendor Product Version Raw CPE
elecom wrh-300bk3_firmware <= 1.05 cpe:2.3:o:elecom:wrh-300bk3_firmware:*:*:*:*:*:*:*:*
elecom wrh-300wh3_firmware <= 1.05 cpe:2.3:o:elecom:wrh-300wh3_firmware:*:*:*:*:*:*:*:*
elecom wrh-300bk3-s_firmware <= 1.05 cpe:2.3:o:elecom:wrh-300bk3-s_firmware:*:*:*:*:*:*:*:*
elecom wrh-300wh3-s_firmware <= 1.05 cpe:2.3:o:elecom:wrh-300wh3-s_firmware:*:*:*:*:*:*:*:*
elecom wrh-300lb3-s_firmware <= 1.05 cpe:2.3:o:elecom:wrh-300lb3-s_firmware:*:*:*:*:*:*:*:*
elecom wrh-300pn3-s_firmware <= 1.05 cpe:2.3:o:elecom:wrh-300pn3-s_firmware:*:*:*:*:*:*:*:*
elecom wrh-300yg3-s_firmware <= 1.05 cpe:2.3:o:elecom:wrh-300yg3-s_firmware:*:*:*:*:*:*:*:*
elecom wrh-300dr3-s_firmware <= 1.05 cpe:2.3:o:elecom:wrh-300dr3-s_firmware:*:*:*:*:*:*:*:*

References for CVE-2022-21173

cvelogic Threat Intelligence