What is CVE-2023-28767?

CVE-2023-28767 is a high-severity vulnerability in Zyxel Atp Series Firmware, classified under OS Command Injection. CVSS score: 8.8/10. Published 2023-07-17.

How severe is CVE-2023-28767?

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

RCE in Zyxel Atp Series Firmware

CVE-2023-28767

The configuration parser fails to sanitize user-controlled input in the Zyxel ATP series firmware versions 5.10 through 5.36, USG FLEX series firmware versions 5.00 through 5.36, USG FLEX 50(W) series firmware versions 5.10 through 5.36, USG20(W)-VPN series firmware versions 5.10 through 5.36, and VPN series firmware versions 5.00 through 5.36. An unauthenticated, LAN-based attacker could leverage the vulnerability to inject some operating system (OS) commands into the device configuration data on an affected device when the cloud management mode is enabled.

Vulnerability class: Command Injection (OS Command Injection)

EPSS: 0.004 (33.7th 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

Zyxel Atp Series Firmware — versions 5.10 through 5.36
Zyxel Usg_20w-vpn
Zyxel Usg_20w-vpn_firmware
Zyxel Usg20(w)-vpn Series Firmware — versions 5.10 through 5.36
Zyxel Usg_2200-vpn
Zyxel Usg_2200-vpn_firmware
Zyxel Usg_flex_100
Zyxel Usg_flex_100_firmware
Zyxel Usg_flex_100w
Zyxel Usg_flex_100w_firmware

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

security@zyxel.com.tw (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2023-28767?: CVE-2023-28767 is a high-severity vulnerability in Zyxel Atp Series Firmware, classified under OS Command Injection. CVSS score: 8.8/10. Published 2023-07-17.
How severe is CVE-2023-28767?: High severity. CVSS v3 base score is 8.8 out of 10.