High severity8.8NVD Advisory· Published Nov 30, 2023· Updated Jun 17, 2026
CVE-2023-37927
CVE-2023-37927
Description
The improper neutralization of special elements in the CGI program of the Zyxel NAS326 firmware version V5.21(AAZF.14)C0 and NAS542 firmware version V5.21(ABAG.11)C0 could allow an authenticated attacker to execute some operating system (OS) commands by sending a crafted URL to a vulnerable device.
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Affected products
5- Zyxel/NAS326 firmwarev5Range: V5.21(AAZF.14)C0
- Zyxel/NAS542 firmwarev5Range: V5.21(ABAG.11)C0
Patches
Vulnerability mechanics
References
2- www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-authentication-bypass-and-command-injection-vulnerabilities-in-nas-productsnvdPatchVendor Advisory
- bugprove.com/knowledge-hub/cve-2023-37927-and-cve-2023-37928-multiple-post-auth-blind-os-command-and-python-code-injection-vulnerabilities-in-zyxel-s-nas-326-devices/nvd
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