Vulnerability · Published Nov 30, 2023 · Assigned by Zyxel
CVE-2023-4473
Critical 9.8
In plain English
A critical-severity OS command injection in NAS326 firmware from Zyxel. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 41.3% (higher than 99% of all known vulnerabilities).
Severity (CVSS 3.1)9.8Critical
Exploit odds (30 days)41.3%top 1.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
A command injection vulnerability in the web server of the Zyxel NAS326 firmware version V5.21(AAZF.14)C0 and NAS542 firmware version V5.21(ABAG.11)C0 could allow an unauthenticated attacker to execute some operating system (OS) commands by sending a crafted URL to a vulnerable device.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Zyxel | NAS326 firmware | V5.21(AAZF.14)C0 |
| Zyxel | NAS542 firmware | V5.21(ABAG.11)C0 |
Weakness: CWE-78 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
References
- https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-authentication-bypass-and-command-injection-vulnerabilities-in-nas-products vendor-advisory
- https://bugprove.com/knowledge-hub/cve-2023-4473-and-cve-2023-4474-authentication-bypass-and-multiple-blind-os-command-injection-vulnerabilities-in-zyxel-s-nas-326-devices/