CVE-2026-18686 (GCVE-0-2026-18686)

Vulnerability from cvelistv5 – Published: 2026-08-04 00:00 – Updated: 2026-08-04 15:04
VLAI
Title
GL.iNet GL-MT3000 nas-web RPC Wrapper glc nas-web.add_user command injection
Summary
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.
Severity
9.3 (Critical)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P
9.8 (Critical)
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
9.8 (Critical)
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
SSVC
Exploitation: poc Automatable: yes Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
Assigner
References
URL Tags
https://vuldb.com/vuln/385612 vdb-entrytechnical-description
https://vuldb.com/vuln/385612/cti signaturepermissions-required
https://vuldb.com/cve/CVE-2026-18686 third-party-advisory
https://vuldb.com/submit/856139 third-party-advisory
https://github.com/coconut652-7/IOT_Vul_Public/tr… exploit
Impacted products
Vendor Product Version
GL.iNet GL-MT3000 Affected: 4.4.0
Affected: 4.4.1
Affected: 4.4.2
Affected: 4.4.3
Affected: 4.4.4
Affected: 4.4.5
    cpe:2.3:o:gl-inet:gl-mt3000_firmware:*:*:*:*:*:*:*:*
 Create a notification for this product.
Credits
coconut (VulDB User) VulDB CNA Team
Show details on NVD website
To clipboard 

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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.