What is CVE-2021-20776?

CVE-2021-20776 is a critical-severity vulnerability in A-Stage Inc. Sct-40cm01sr And At-40cm01sr, classified under Improper Authentication. CVSS score: 9.8/10. Published 2021-07-07.

How severe is CVE-2021-20776?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Auth bypass in A-Stage Inc. Sct-40cm01sr And At-40cm01sr

CVE-2021-20776

Improper authentication vulnerability in SCT-40CM01SR and AT-40CM01SR allows an attacker to bypass access restriction and execute an arbitrary command via telnet.

Vulnerability class: Broken Authentication

EPSS: 0.013 (67.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

A-stage Inc. Sct-40cm01sr And At-40cm01sr — versions all versions
A-stage-inc At-40cm01sr
A-stage-inc At-40cm01sr_firmware
A-stage-inc Sct-40cm01sr
A-stage-inc Sct-40cm01sr_firmware

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

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

Frequently asked questions

What is CVE-2021-20776?: CVE-2021-20776 is a critical-severity vulnerability in A-Stage Inc. Sct-40cm01sr And At-40cm01sr, classified under Improper Authentication. CVSS score: 9.8/10. Published 2021-07-07.
How severe is CVE-2021-20776?: Critical severity. CVSS v3 base score is 9.8 out of 10.