critical9.8Known exploited
CVE-2023-27992
Zyxel Multiple NAS Devices Command Injection Vulnerability
Exploited in the wild
This vulnerability is on a Known Exploited Vulnerabilities catalogue, added 2023-06-23. Federal due date: 2023-07-14.
Apply updates per vendor instructions.
Impact
The pre-authentication command injection vulnerability in the Zyxel NAS326 firmware versions prior to V5.21(AAZF.14)C0, NAS540 firmware versions prior to V5.21(AATB.11)C0, and NAS542 firmware versions prior to V5.21(ABAG.11)C0 could allow an unauthenticated attacker to execute some operating system (OS) commands remotely by sending a crafted HTTP request.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Zyxel | Nas326 Firmware | before 5.21\(aazf.14\)c0 |
| Zyxel | Nas540 Firmware | before 5.21\(aatb.11\)c0 |
| Zyxel | Nas542 Firmware | before 5.21\(abag.11\)c0 |
Weakness classification
References
- NVD record
- CVE.org record
- CISA KEV catalog
- https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-pre-authentication-command-injection-vulnerability-in-nas-products
- https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-pre-authentication-command-injection-vulnerability-in-nas-products
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-27992