Zyxel Releases Urgent Security Updates for Critical Vulnerability in NAS Devices
Jun 20, 2023
Vulnerability / Data Security
Zyxel has rolled out security updates to address a critical security flaw in its network-attached storage (NAS) devices that could result in the execution of arbitrary commands on affected systems. Tracked as CVE-2023-27992 (CVSS score: 9.8), the issue has been described as a pre-authentication command injection vulnerability. "The pre-authentication command injection vulnerability in some Zyxel NAS devices could allow an unauthenticated attacker to execute some operating system (OS) commands remotely by sending a crafted HTTP request," Zyxel said in an advisory published today. Andrej Zaujec, NCSC-FI, and Maxim Suslov have been credited with discovering and reporting the flaw. The following versions are impacted by CVE-2023-27992 - NAS326 (V5.21(AAZF.13)C0 and earlier, patched in V5.21(AAZF.14)C0), NAS540 (V5.21(AATB.10)C0 and earlier, patched in V5.21(AATB.11)C0), and NAS542 (V5.21(ABAG.10)C0 and earlier, patched in V5.21(ABAG.11)C0) The alert comes two weeks