Intel

CVE-2026-18686

Eine Schwachstelle wurde im GL.

criticalEPSS 4.7%

Description

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.

Source: cvelistv5NVD (NIST)

Metrics

XIEM Effective CVSS
9.8
Source: nvd-v3
EPSS percentile
91.6 %
Critical — this CVE ranks in the top fifth of all CVEs scored today (rank ≥ 80%).
KEV status
—
Show all metrics
Severity
critical
Priority score
140.27
Exploit maturity
no public PoC known
CVSS v3
9.8
CVSS v4
9.3
EPSS score
4.7 %
Moderate — model estimates 1-10% exploitation likelihood.
Published
2026-08-04 00:00 UTC
CWE
CWE-77, CWE-74

Weakness classes (CWE)

  • CWE-77Class

    Improper Neutralization of Special Elements used in a Command ('Command Injection')

    The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component.

    cwe.mitre.org →

  • CWE-74Class

    Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

    The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.

    cwe.mitre.org →

References & sources

Reanalysis & status changes

Chronological NVD audit events for this CVE — reanalyses, CVSS updates, CPE diffs.

  1. CVE Modified2026-08-04 16:16 UTC· 134c704f-9b21-4f2e-91b3-4a467353bcc0
    • SSVC: {"id":"CVE-2026-18686","role":"CISA Coordinator","options":[{"exploitation":"poc"},{"automatable":"yes"},{"technicalI…
  2. New CVE Received2026-08-04 00:16 UTC· cna@vuldb.com
    • Affected: GL-MT3000
    • Description: 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.
    • CVSS V4.0: AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
    • CVSS V3.1: AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Linked advisories