CVE-2024-29974: Zyxel NAS326 Firmware

Critical severity, CVSS 9.8. EPSS: 22.8% chance of exploitation in the next 30 days.

** UNSUPPORTED WHEN ASSIGNED ** The remote code execution vulnerability in the CGI program “file_upload-cgi” in Zyxel NAS326 firmware versions before V5.21(AAZF.17)C0 and NAS542 firmware versions before V5.21(ABAG.14)C0 could allow an unauthenticated attacker to execute arbitrary code by uploading a crafted configuration file to a vulnerable device.

Affected products

• Zyxel NAS326 Firmware: before 5.21\(aazf.17\)c0 (fixed in 5.21\(aazf.17\)c0)
• Zyxel NAS542 Firmware: before 5.21\(abag.14\)c0 (fixed in 5.21\(abag.14\)c0)

Published 2024-06-04. Last modified 2026-06-17.