What’s Vulnerable › Vulnerabilities

CVE-2020-5634

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-10-06 · updated 2026-06-17

Description

ELECOM LAN routers (WRC-2533GST2 firmware versions prior to v1.14, WRC-1900GST2 firmware versions prior to v1.14, WRC-1750GST2 firmware versions prior to v1.14, and WRC-1167GST2 firmware versions prior to v1.10) allow an attacker on the same network segment to execute arbitrary OS commands with a root privilege via unspecified vectors.

Affected products

• Elecom Wrc-1167Gst2 Firmware: before 1.10 — fixed in 1.10
• Elecom Wrc-1750Gst2 Firmware: before 1.14 — fixed in 1.14
• Elecom Wrc-1900Gst2 Firmware: before 1.14 — fixed in 1.14
• Elecom Wrc-2533Gst2 Firmware: before 1.14 — fixed in 1.14

How to fix

Upgrade to a fixed version: Elecom Wrc-1167Gst2 Firmware 1.10; Elecom Wrc-1750Gst2 Firmware 1.14; Elecom Wrc-1900Gst2 Firmware 1.14; Elecom Wrc-2533Gst2 Firmware 1.14. Check the vendor advisory for mitigations.

References

• https://jvn.jp/en/jp/JVN82892096/index.html
• https://www.elecom.co.jp/news/security/20201005-01/
• https://jvn.jp/en/jp/JVN82892096/index.html
• https://www.elecom.co.jp/news/security/20201005-01/

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