What is CVE-2021-20863?

CVE-2021-20863 is a high-severity vulnerability in Elecom Edwrc-2533gst2, classified under OS Command Injection. CVSS score: 8.0/10. Published 2021-12-01.

How severe is CVE-2021-20863?

High severity. CVSS v3 base score is 8.0 out of 10.

RCE in Elecom Edwrc-2533gst2

CVE-2021-20863

OS command injection vulnerability in ELECOM routers (WRC-1167GST2 firmware v1.25 and prior, WRC-1167GST2A firmware v1.25 and prior, WRC-1167GST2H firmware v1.25 and prior, WRC-2533GS2-B firmware v1.52 and prior, WRC-2533GS2-W firmware v1.52 and prior, WRC-1750GS firmware v1.03 and prior, WRC-1750GSV firmware v2.11 and prior, WRC-1900GST firmware v1.03 and prior, WRC-2533GST firmware v1.03 and prior, WRC-2533GSTA firmware v1.03 and prior, WRC-2533GST2 firmware v1.25 and prior, WRC-2533GST2SP firmware v1.25 and prior, WRC-2533GST2-G firmware v1.25 and prior, and EDWRC-2533GST2 firmware v1.25 and prior) allows a network-adjacent authenticated attackers to execute an arbitrary OS command with the root privilege via unspecified vectors.

Vulnerability class: Command Injection (OS Command Injection)

EPSS: 0.009 (54.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.0 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

vultures@jpcert.or.jp (x_refsource_MISC, Vendor Advisory)
vultures@jpcert.or.jp (Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-20863?: CVE-2021-20863 is a high-severity vulnerability in Elecom Edwrc-2533gst2, classified under OS Command Injection. CVSS score: 8.0/10. Published 2021-12-01.
How severe is CVE-2021-20863?: High severity. CVSS v3 base score is 8.0 out of 10.