** UNSUPPORTED WHEN ASSIGNED ** The remote code execution vulnerability in the CGI program “file_upload-cgi” in Zyxel NAS326 firmware versions before V5.21(AAZF.17)C0 and NAS542 firmware versions before V5.21(ABAG.14)C0 could allow an unauthenticated attacker to execute arbitrary code by uploading a crafted configuration file to a vulnerable device.
Conclusion & alert: CVE-2024-29974 is rated High Exploit Risk (83.3/100): CVSS Critical severity, with high exploitation likelihood (EPSS 22.78%, 97th percentile). Core evidence: 1 public exploit reference(s) are indexed (Exploit-DB). Mandatory action: Public exploits are available—assess exposure, apply mitigations, and prioritize patching.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
| EDB-ID | Source | Kind | Published | Link |
|---|---|---|---|---|
| — | nvd_ref | exploit_tag | Exploit-DB ↗ |
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-06-15 | 43.71% | 22.78% | -20.92% |
| 2 | 2026-05-22 | 47.60% | 43.71% | -3.89% |
| 3 | 2025-11-21 | — | 47.60% | — |
Full EPSS history (15 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 9.8 | 3.1 | CRITICAL |
|
3.9 | 5.9 | [email protected] |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| zyxel | nas326_firmware | < 5.21\(aazf.17\)c0 | cpe:2.3:o:zyxel:nas326_firmware:*:*:*:*:*:*:*:* |
| zyxel | nas542_firmware | < 5.21\(abag.14\)c0 | cpe:2.3:o:zyxel:nas542_firmware:*:*:*:*:*:*:*:* |
| URL | Tags |
|---|---|
| https://outpost24.com/blog/zyxel-nas-critical-vulnerabilities/ | Exploit Third Party Advisory |
| https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-in-nas-products-06-04-2024 | Vendor Advisory |