What is CVE-2023-27991?

CVE-2023-27991 is a high-severity vulnerability in Zyxel Atp100, classified under OS Command Injection. CVSS score: 8.8/10. Published 2023-04-24.

How severe is CVE-2023-27991?

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

RCE in Zyxel Atp100

CVE-2023-27991

The post-authentication command injection vulnerability in the CLI command of Zyxel ATP series firmware versions 4.32 through 5.35, USG FLEX series firmware versions 4.50 through 5.35, USG FLEX 50(W) firmware versions 4.16 through 5.35, US…

Vulnerability class: Command Injection (OS Command Injection)

EPSS: 0.015 (71.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

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

Affected products

Zyxel Atp100
Zyxel Atp100_firmware
Zyxel Atp100w
Zyxel Atp100w_firmware
Zyxel Atp200
Zyxel Atp200_firmware
Zyxel Atp500
Zyxel Atp500_firmware
Zyxel Atp700
Zyxel Atp700_firmware

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

security@zyxel.com.tw (Vendor Advisory)

Frequently asked questions

What is CVE-2023-27991?: CVE-2023-27991 is a high-severity vulnerability in Zyxel Atp100, classified under OS Command Injection. CVSS score: 8.8/10. Published 2023-04-24.
How severe is CVE-2023-27991?: High severity. CVSS v3 base score is 8.8 out of 10.