CVE-2024-29972
CriticalExploitedPublic exploitUNSUPPORTED WHEN ASSIGNED The command injection vulnerability in the CGI program "remote_help-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 some operating…
Published Jun 7, 2024 · Updated Aug 2, 2024 · Also known as TR-24-0620
Key Facts
Patch immediately- CVE-2024-29972 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting NAS326 firmware (Zyxel), NAS542 firmware (Zyxel).
- It is exploited in the wild, listed in Industry KEV feed, CIRCL KEV since Jun 7, 2025. Public exploit code is available.
- EPSS estimates a 89% probability of exploitation in the next 30 days.
- Fixed versions are available, including NAS326 firmware 5.21\(aazf.17\)c0, NAS542 firmware 5.21\(abag.14\)c0.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
89%
Higher than 99.7% of all scored CVEs
Exploited in the wild
Yes
2 catalog listings
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2024-29972 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
UNSUPPORTED WHEN ASSIGNED The command injection vulnerability in the CGI program "remote_help-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 some operating system (OS) commands by sending a crafted HTTP POST request.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| Industry KEV feed | Jun 7, 2025 | n/a | Not reported |
| CIRCL KEV | Jul 13, 2026 | n/a | Not reported |
Required action: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.
Affected Products
4 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| NAS326 firmwareZyxel | >= < V5.21(AAZF.17)C0 | 5.21\(aazf.17\)c0 |
| NAS542 firmwareZyxel | >= < V5.21(ABAG.14)C0 | 5.21\(abag.14\)c0 |
Patched Releases
NAS326 firmware
5.21\(aazf.17\)c0
NAS542 firmware
5.21\(abag.14\)c0
Timeline
Publicly disclosed
Jun 7, 2024
Last updated
Aug 2, 2024
Added to Industry KEV feed
Jun 7, 2025
Added to CIRCL KEV
Jul 13, 2026
Weakness Type
- CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
References
- advisoryhttps://outpost24.com/blog/zyxel-nas-critical-vulnerabilities/
- advisoryUSOM advisory
- advisoryhttps://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-in-nas-products-06-04-2024
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
FAQ
Common Questions.
UNSUPPORTED WHEN ASSIGNED The command injection vulnerability in the CGI program "remote_help-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 some operating system (OS) commands by sending a crafted H…
Affected: NAS326 firmware (Zyxel) versions >= < V5.21(AAZF.17)C0; NAS542 firmware (Zyxel) versions >= < V5.21(ABAG.14)C0. The full list is in the CVE brief.
It is exploited in the wild, listed in Industry KEV feed, CIRCL KEV since Jun 7, 2025.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including NAS326 firmware 5.21\(aazf.17\)c0, NAS542 firmware 5.21\(abag.14\)c0.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Is CVE-2024-29972 Running On Your Attack Surface?
Brandefense maps vulnerabilities like this one to your internet-facing assets and tells you exactly where to patch.
Request A Demo