How severe is CVE-2020-5634?

CVE-2020-5634 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-5634 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-5634?

CVE-2020-5634 primarily affects Elecom Wrc-2533gst2 Firmware. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-5634?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2020-5634 published?

CVE-2020-5634 was published on 2020-10-06 and last updated on 2026-06-17.

CVE-2020-5634

CVE-2020-5634 is a high-severity vulnerability in Elecom Wrc-2533gst2 Firmware with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 8.3
EPSS exploit prediction: 1% (45th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Elecom Wrc-2533gst2 Firmware
Published: 2020-10-06
Last modified: 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.

Frequently asked questions

What is CVE-2020-5634?: 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.
How severe is CVE-2020-5634?: CVE-2020-5634 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-5634 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (45th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-5634?: CVE-2020-5634 primarily affects Elecom Wrc-2533gst2 Firmware. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-5634?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2020-5634 published?: CVE-2020-5634 was published on 2020-10-06 and last updated on 2026-06-17.

References

Affected products (4)

cpe:2.3:o:elecom:wrc-2533gst2_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:elecom:wrc-1900gst2_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:elecom:wrc-1750gst2_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:elecom:wrc-1167gst2_firmware:*:*:*:*:*:*:*:*

More vulnerabilities in Elecom Wrc-2533gst2 Firmware

CVE-2024-23910 — High (CVSS 8.8): Cross-site request forgery (CSRF) vulnerability in ELECOM wireless LAN routers and wireless LAN repeater allows a…
CVE-2022-25915 — High (CVSS 8.8): Improper access control vulnerability in ELECOM LAN routers (WRC-1167GST2 firmware v1.25 and prior, WRC-1167GST2A…
CVE-2021-20864 — High (CVSS 8.8): Improper access control vulnerability in ELECOM routers (WRC-1167GST2 firmware v1.25 and prior, WRC-1167GST2A firmware…
CVE-2021-20861 — High (CVSS 8.8): Improper access control vulnerability in ELECOM LAN routers (WRC-1167GST2 firmware v1.25 and prior, WRC-1167GST2A…
CVE-2021-20860 — High (CVSS 8.8): Cross-site request forgery (CSRF) vulnerability in ELECOM LAN routers (WRC-1167GST2 firmware v1.25 and prior,…
CVE-2021-20863 — High (CVSS 8.0): OS command injection vulnerability in ELECOM routers (WRC-1167GST2 firmware v1.25 and prior, WRC-1167GST2A firmware…

All CVEs affecting Elecom Wrc-2533gst2 Firmware →