CVE-2026-18686CWE-74CWE-77command-injection

CVE-2026-18686

Critical · published August 4, 2026

CVSS v3.1
9.8
EPSS
5%
Percentile
91.8
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.04731 · 91.8th percentile
Weaknesses
CWE-74 · Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection'); CWE-77 · Improper Neutralization of Special Elements used in a Command ('Command Injection')
Published
2026-08-04T04:16Z
References (5)
https://github.com/coconut652-7/IOT_Vul_Public/tree/main/Glinet/MT3000/nas-web/ADD_USER_ADD_SHARE · [email protected]https://vuldb.com/cve/CVE-2026-18686 · [email protected]https://vuldb.com/submit/856139 · [email protected]https://vuldb.com/vuln/385612 · [email protected]https://vuldb.com/vuln/385612/cti · [email protected]
EPSS history
Timeline
  • 04 AUG 00:00Z
    GL.iNet GL-MT3000 nas-web RPC Wrapper glc nas-web.add_user command injection
    cvelistv5