ClosedCriticalPatched

Zyxel Multiple Network-Attached Storage (NAS) Devices: Command Injection (CVE-2023-27992)

Zyxel Multiple Network-Attached Storage (NAS) Devices

Multiple Zyxel network-attached storage (NAS) devices contain a pre-authentication command injection vulnerability that could allow an unauthenticated attacker to execute commands remotely via a crafted HTTP request. Added to CISA KEV on 2023-06-23.

Why this severity: CVSS 9.8 (NVD), actively exploited (CISA KEV)

Started: Jun 23, 2023
Closed: Jun 23, 2023
CVE: CVE-2023-27992

Follow this incident

Updated Jun 23, 2023

Affected

See vendor advisory / CISA notes (versions not always listed in KEV feed)

Fixed in

See vendor advisory linked in sources

Timeline1

Jun 23, 2023
CISA added CVE-2023-27992 to the KEV catalog (due 2023-07-14).

Advisories3

Notes & caveats

Derived from CISA KEV JSON feed catalogVersion 2026.10.21. Exact affected/fixed version strings are not always in the KEV record — verify against the vendor advisory URL. startedAt uses dateAdded (exploitation may have begun earlier).

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