What is CVE-2023-35138?

CVE-2023-35138 is a critical-severity vulnerability in Zyxel Nas326 Firmware, classified under OS Command Injection. CVSS score: 9.8/10. Published 2023-11-30.

How severe is CVE-2023-35138?

Critical severity. CVSS v3 base score is 9.8 out of 10.

RCE in Zyxel Nas326 Firmware

CVE-2023-35138

A command injection vulnerability in the “show_zysync_server_contents” function of the Zyxel NAS326 firmware version V5.21(AAZF.14)C0 and NAS542 firmware version V5.21(ABAG.11)C0 could allow an unauthenticated attacker to execute some oper…

Vulnerability class: Command Injection (OS Command Injection)

EPSS: 0.096 (93.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Zyxel Nas326 Firmware — versions V5.21(AAZF.14)C0
Zyxel Nas542 Firmware — versions V5.21(ABAG.11)C0

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for… (vendor-advisory)

Frequently asked questions

What is CVE-2023-35138?: CVE-2023-35138 is a critical-severity vulnerability in Zyxel Nas326 Firmware, classified under OS Command Injection. CVSS score: 9.8/10. Published 2023-11-30.
How severe is CVE-2023-35138?: Critical severity. CVSS v3 base score is 9.8 out of 10.