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TI-2021-02927 Aliases CVE-2021-4039GHSA-9ww2-qwrq-m7wv

OS command injection in Zyxel NWA1100-NH firmware

Priority HIGH 80CWE-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
No fix listed

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

Summary

A command injection vulnerability in the web interface of the Zyxel NWA-1100-NH firmware could allow an attacker to execute arbitrary OS commands on the device.

Why it matters now

EPSS 0.71048 99th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
ZyxelNWA1100-NH firmware2.12(AASI.0)C0—No fix listedCNA
  • NWA1100-NH firmware VendorZyxel Affected 2.12(AASI.0)C0 Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:zyxel:nwa1100-nh_firmware:*:*:*:*:*:*:*:*before 2.12\(aasi.3\)c0VulnerableZyxel
cpe:2.3:h:zyxel:nwa1100-nh:-:*:*:*:*:*:*:*not specified by NVDRunning onZyxel
  • cpe:2.3:o:zyxel:nwa1100-nh_firmware:*:*:*:*:*:*:*:* Versions before 2.12\(aasi.3\)c0 Vulnerable ·Zyxel
  • cpe:2.3:h:zyxel:nwa1100-nh:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Zyxel

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-4039
  2. 2026-10-03 Alias added: GHSA-9ww2-qwrq-m7wv

References

Exploit 1

Patch 1

  • TI-2015-06028 ZyXEL NWA1100-N, NWA1100-NH, NWA1121-NI, NWA1123-AC, and NWA1123-NI access points… CVSS 3.0MEDIUM 5.9

Sources

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