CVE-2021-20776 — CRITICAL (9.8)

Vulnerability Description

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

CVSS Score

9.8

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
A-Stage-Inc	At-40Cm01Sr Firmware	-
A-Stage-Inc	At-40Cm01Sr	All versions
A-Stage-Inc	Sct-40Cm01Sr Firmware	-
A-Stage-Inc	Sct-40Cm01Sr	-

Related Weaknesses (CWE)

CWE-287

References

https://jvn.jp/en/jp/JVN21636825/index.htmlThird Party Advisory
https://jvn.jp/en/jp/JVN21636825/index.htmlThird Party Advisory

FAQ

What is CVE-2021-20776?

CVE-2021-20776 is a vulnerability with a CVSS score of 9.8 (CRITICAL). Improper authentication vulnerability in SCT-40CM01SR and AT-40CM01SR allows an attacker to bypass access restriction and execute an arbitrary command via telnet.

How severe is CVE-2021-20776?

CVE-2021-20776 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2021-20776?

Check the references section above for vendor advisories and patch information. Affected products include: A-Stage-Inc At-40Cm01Sr Firmware, A-Stage-Inc At-40Cm01Sr, A-Stage-Inc Sct-40Cm01Sr Firmware, A-Stage-Inc Sct-40Cm01Sr.