CVE-2021-20776

9.8 criticalEPSS 1.3%

Critical (9.8) in a-stage-inc. EPSS 1.3% chance of exploitation in the next 30 days.

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

Severity

CVSS 3.1

9.8 critical

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

EPSS: 1.3% chance of exploitation in the next 30 days; higher than 70% of CVEs (scores of 2026-10-31)
CWE: CWE-287
Published: 2021-07-07
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

a-stage-inc:at-40cm01sr_firmware
a-stage-inc:sct-40cm01sr_firmware

References

https://jvn.jp/en/jp/JVN21636825/index.html
https://jvn.jp/en/jp/JVN21636825/index.html

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