CVE-2026-18686

CRITICAL 9.8

GL.iNet GL-MT3000 nas-web RPC Wrapper glc nas-web.add_user command injection

CVSS Score

9.8

EPSS Score

0.0%

EPSS Percentile

0th

A vulnerability was detected in GL.iNet GL-MT3000 up to 4.4.5. The affected element is the function nas-web.add_user of the file /cgi-bin/glc of the component nas-web RPC Wrapper. Performing a manipulation results in command injection. The attack can be initiated remotely. The exploit is now public and may be used. The vendor was contacted early about this disclosure and confirmed the existence of the vulnerability.

CWE	CWE-77 CWE-74
Vendor	gl.inet
Product	gl-mt3000
Published	Aug 4, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

GL.iNet / GL-MT3000

4.4.0 4.4.1 4.4.2 4.4.3 4.4.4 4.4.5

References

NVD ↗ CVE.org ↗ EPSS Data ↗

vuldb.com: https://vuldb.com/vuln/385612 vuldb.com: https://vuldb.com/vuln/385612/cti vuldb.com: https://vuldb.com/cve/CVE-2026-18686 vuldb.com: https://vuldb.com/submit/856139 github.com: https://github.com/coconut652-7/IOT_Vul_Public/tree/main/Glinet/MT3000/nas-web/ADD_USER_ADD_SHARE

Credits

🔍 coconut (VulDB User) VulDB CNA Team