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CVE-2020-5634

22
FAUCET Score

CVE-2020-5634 is a critical vulnerability affecting several ELECOM LAN router models (WRC-2533GST2, WRC-1900GST2, WRC-1750GST2, and WRC-1167GST2) with specific firmware versions. An attacker on the same network segment can achieve arbitrary OS command execution with root privileges through unspecified vectors. With a CVSS score of 8.8 (High), this vulnerability 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, and it is not listed in CISA's KEV catalog.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.14CPE matchmatch criteria
cpe:2.3:o:elecom:wrc-2533gst2_firmware:*:*:*:*:*:*:*:*
< 1.14CPE matchmatch criteria
cpe:2.3:o:elecom:wrc-1900gst2_firmware:*:*:*:*:*:*:*:*
< 1.14CPE matchmatch criteria
cpe:2.3:o:elecom:wrc-1750gst2_firmware:*:*:*:*:*:*:*:*
< 1.10CPE matchmatch criteria
cpe:2.3:o:elecom:wrc-1167gst2_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
0.61%
Probability of exploitation in next 30 days
EPSS Percentile
45.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0061 is in the 48th percentile among its peer group of 1,875 CVEs.

Social Chatter

No social media mentions found for this CVE.

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/JVN82892096/index.html
Third Party Advisory
elecom.co.jp / news/security/20201005-01
Vendor Advisory