What is CVE-2021-26637?

CVE-2021-26637 is a high-severity vulnerability in Shinasys Sihas Acm-300, classified under Improper Authentication. CVSS score: 8.8/10. Published 2022-06-23.

How severe is CVE-2021-26637?

High severity. CVSS v3 base score is 8.8 out of 10.

Auth bypass in Shinasys Sihas Acm-300

CVE-2021-26637

There is no account authentication and permission check logic in the firmware and existing apps of SiHAS's SGW-300, ACM-300, GCM-300, so unauthorized users can remotely control the device.

Vulnerability class: Broken Authentication

EPSS: 0.018 (75.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Shinasys Sihas_acm-300
Shinasys Sihas_acm-300_firmware
Shinasys Sihas_gcm-300
Shinasys Sihas_gcm-300_firmware
Shinasys Sihas_sgw-300
Shinasys Sihas_sgw-300_firmware
Shina System Co.,ltd Sihas Firmware — versions 1.xx
Shina System Co.,ltd Sihas Old App — versions old app

Weakness classification (CWE)

References

vuln@krcert.or.kr (VDB Entry, Third Party Advisory, x_refsource_MISC, Broken Link)

Frequently asked questions

What is CVE-2021-26637?: CVE-2021-26637 is a high-severity vulnerability in Shinasys Sihas Acm-300, classified under Improper Authentication. CVSS score: 8.8/10. Published 2022-06-23.
How severe is CVE-2021-26637?: High severity. CVSS v3 base score is 8.8 out of 10.