by Kastro
Paper/Archive/CVE-2026-18686

CVE-2026-18686

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

EPSS 5%public exploitCVSS 9.8
critical.is priorityof 100
58
CVSS 9.8 (CNA)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 91.9.919 × 2018.4Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
GL-MT30004.4.0–CNA
GL-MT30004.4.1–CNA
GL-MT30004.4.2–CNA
GL-MT30004.4.3–CNA
GL-MT30004.4.4–CNA
GL-MT30004.4.5–CNA

Scores by source

VulDB (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
VulDB (CNA)9.8CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
VulDB (CNA)9.3CVSS: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
CISA ADPSSVCExploitation: poc · Automatable: yes · Technical impact: total

References

writeupvuldb.com/vuln/385612refvuldb.com/vuln/385612/ctiwriteupvuldb.com/cve/CVE-2026-18686writeupvuldb.com/submit/856139exploitgithub.com/coconut652-7/IOT_Vul_Public/tree/main/Glinet/MT3000/nas-web/ADD_USER_ADD_SHARE