VulnSocial

CVE-2026-18686Exploit

LOWCVSS 8.9 · HIGH

Exploit discussion active in current signal (1 latest mentions)

Immediate actions

  • Hunt for exploitation attempts and persistence artifacts
  • Increase monitoring for publicly documented tradecraft
  • Track advisory updates for patch or workaround availability

Recommended action window: High priority (within 72h)

NVD 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.

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1.5/ 10 priority

Sources & remediation

Other references
Weakness type (CWE)
CWE-74CWE-77

Priority

LOW

Exploitation

NONE

PoC

YES

Patch

NONE

Momentum

STABLE

Threat summary

  • Public PoC is present in monitored signal
  • 2 mentions across 2 observed days
  • Momentum state: stable

What's happening

  • PoC mentioned or linked in 2 signals
  • Technical details provided in 2 signals
  • Exploit: 1 classified signal
  • Peaked 1d ago at 1 mentions (2026-08-04); latest day: 1
  • 2 total mentions across 2 days

Deep dive

Activity timeline2 mentions / 2d
00111Mentions · 2026-08-04: 1Mentions · 2026-08-07: 1PoC Mentioned / Linked · 2026-08-04: 1PoC Mentioned / Linked · 2026-08-07: 1Technical Details · 2026-08-04: 1Technical Details · 2026-08-07: 108-0408-07
Signal classification2 categories
Exploit
150.0%
PoC
150.0%
Referenced assets2 URLs
Classification over time
DateTotalLabels
2026-08-041
Exploit1
2026-08-071
PoC1
Full discourse2 posts
  • SecAlerts@SecAlertsCo
    PoC

    💉 PoC exists: CVE-2026-18686 hits GL.iNet GL-MT3000 via command injection in the nas-web.add_user function at /cgi-bin/glc. No auth needed, network-accessible, CVSS 8.9. Up to v4.4.5 affected. #cybersecurity #vulnerabilities #ciso https://secalerts.co/vulnerability/CVE-2026-18686?utm_campaign=x https://t.co/cWRYGNwVCD

    Post summary

    The tweet announces a PoC for CVE‑2026‑18686, describing a command‑injection flaw in the GL.iNet GL‑MT3000 (up to v4.4.5) with a CVSS score of 8.9.

    00000137
    875 followersView on X
  • Hugo | DevOps | Cybersecurity 🇱🇻@HugoValters
    Exploit

    CVE-2026-18686 - Critical command injection in GL.iNet GL-MT3000 via nas-web.add_user. Public exploit, CVSS 9.8, unpatched. Restrict access and monitor now. #CVE #GLiNet https://www.valtersit.com/cve/cve-2026-18686 #CVE #Linux #infosec #infosec #devsecops #devops #developer #sysadmin #100daysofcode #git #github #gitlab #redteam #blueteam #ethicalhacker #ethicalhacking #cybersecurityawareness #cybersecurity #cybersecuritynews #cybersecuritytips #python #hacker #linux #kali #ubuntu

    Post summary

    CVE-2026-18686 is a critical command injection in GL.iNet GL-MT3000 that remains unpatched and has a public exploit; users are advised to restrict access and monitor activity.

    0000090
    1.0K followersView on X

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