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CVE-2022-21173

27
FAUCET Score

CVE-2022-21173 is a hidden functionality vulnerability affecting multiple ELECOM LAN router models (WRH-300BK3, WRH-300WH3, and others) running firmware v1.05 and earlier. This flaw allows an attacker on the adjacent network to execute arbitrary OS commands through unspecified vectors. With a CVSS score of 8.8 (High), it presents a significant risk due to its low attack complexity and high impact on confidentiality, integrity, and availability. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.05CPE matchmatch criteria
cpe:2.3:o:elecom:wrh-300bk3_firmware:*:*:*:*:*:*:*:*
<= 1.05CPE matchmatch criteria
cpe:2.3:o:elecom:wrh-300wh3_firmware:*:*:*:*:*:*:*:*
<= 1.05CPE matchmatch criteria
cpe:2.3:o:elecom:wrh-300bk3-s_firmware:*:*:*:*:*:*:*:*
<= 1.05CPE matchmatch criteria
cpe:2.3:o:elecom:wrh-300wh3-s_firmware:*:*:*:*:*:*:*:*
<= 1.05CPE matchmatch criteria
cpe:2.3:o:elecom:wrh-300lb3-s_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.8HIGH

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

Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.45%
Probability of exploitation in next 30 days
EPSS Percentile
36.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0045 is in the 34th percentile among its peer group of 1,857 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.2 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

jvn.jp / en/jp/JVN17482543/index.html
Third Party Advisory
elecom.co.jp / news/security/20220208-02
Vendor Advisory