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TI-2024-19736 Aliases CVE-2024-29973GHSA-2w49-w2vv-p84h

OS command injection in Zyxel NAS326 firmware

Priority CRITICAL 91CWE-78Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-78.

Summary

** UNSUPPORTED WHEN ASSIGNED ** The command injection vulnerability in the “setCookie” parameter 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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.86205 99th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed NAS326 firmware (Zyxel): V5.21(AAZF.17)C0NAS542 firmware (Zyxel): V5.21(ABAG.14)C0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ZyxelNAS326 firmwarebefore V5.21(AAZF.17)C0V5.21(AAZF.17)C0Patch availableCNA
ZyxelNAS542 firmwarebefore V5.21(ABAG.14)C0V5.21(ABAG.14)C0Patch availableCNA
  • NAS326 firmware VendorZyxel Affected before V5.21(AAZF.17)C0 Fixed in V5.21(AAZF.17)C0 Patch available CNA
  • NAS542 firmware VendorZyxel Affected before V5.21(ABAG.14)C0 Fixed in V5.21(ABAG.14)C0 Patch available CNA

CPE configurations NVD · 4

CPEVersionsRoleVendor
cpe:2.3:o:zyxel:nas326_firmware:*:*:*:*:*:*:*:*before 5.21\(aazf.17\)c0VulnerableZyxel
cpe:2.3:h:zyxel:nas326:-:*:*:*:*:*:*:*not specified by NVDRunning onZyxel
cpe:2.3:o:zyxel:nas542_firmware:*:*:*:*:*:*:*:*before 5.21\(abag.14\)c0VulnerableZyxel
cpe:2.3:h:zyxel:nas542:-:*:*:*:*:*:*:*not specified by NVDRunning onZyxel
  • cpe:2.3:o:zyxel:nas326_firmware:*:*:*:*:*:*:*:* Versions before 5.21\(aazf.17\)c0 Vulnerable ·Zyxel
  • cpe:2.3:h:zyxel:nas326:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel
  • cpe:2.3:o:zyxel:nas542_firmware:*:*:*:*:*:*:*:* Versions before 5.21\(abag.14\)c0 Vulnerable ·Zyxel
  • cpe:2.3:h:zyxel:nas542:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel

Remediation

  • Fix · CNA NAS326 firmware (Zyxel) Fixed in V5.21(AAZF.17)C0
  • Fix · CNA NAS542 firmware (Zyxel) Fixed in V5.21(ABAG.14)C0

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    Zyxel NAS326 firmware, NAS542 firmware — zyxel.com/global/en/support/security-advisories/zyxel-secur…

    5 records Highest priority Priority CRITICAL 2 CRITICAL, 1 HIGH, 1 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2024-19735 OS command injection in Zyxel NAS326 firmwarePriority CRITICAL 92
    • TI-2024-19737 Unrestricted file upload in Zyxel NAS326 firmwarePriority HIGH 69
    • TI-2024-19739 Improper privilege management in Zyxel NAS326 firmwarePriority MEDIUM 42
    Show all 5 records → Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2024-29973
  2. 2026-10-03 Alias added: GHSA-2w49-w2vv-p84h

References

Exploit 1

Advisory 1

  • TI-2023-12582 OS command injection in Zyxel NAS326 firmware KEVCVSS 3.1CRITICAL 9.8
  • TI-2020-07267 OS command injection in Zyxel NAS326 KEVCVSS 3.1CRITICAL 9.8
  • TI-2024-19735 OS command injection in Zyxel NAS326 firmware CVSS 3.1CRITICAL 9.8
  • TI-2023-04130 OS command injection in Zyxel NAS326 firmware CVSS 3.1CRITICAL 9.8
  • TI-2023-04129 OS command injection in Zyxel NAS326 firmware CVSS 3.1CRITICAL 9.8
  • TI-2023-19361 OS command injection in Zyxel NAS326 firmware CVSS 3.1HIGH 8.8
See all 23 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences