RCE in Gl.inet A1300
CVE-2026-19983
A vulnerability was detected in GL.iNet A1300, AX1800, AXT1800, MT2500, MT3000, MT6000, X3000 and XE3000 4.8.x. This issue affects some unknown processing of the file /usr/bin/gl_nas_sys of the component NAS Command Service. The manipulation results in os command injection. The attack may be launched remotely. Upgrading to version 4.9.0 is capable of addressing this issue. It is suggested to upgrade the affected component. The vendor explains: "After our investigation, we have confirmed that the vulnerability described (...) does indeed exist."
Vulnerability class: Command Injection (OS Command Injection)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.021 (80.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 81st percentile — 80.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.013 · newest: 0.021 · change: +0.008
Affected products
- Gl.inet A1300 — versions 4.8.*, 4.9.0
- Gl.inet Ax1800 — versions 4.8.*, 4.9.0
- Gl.inet Axt1800 — versions 4.8.*, 4.9.0
- Gl.inet Mt2500 — versions 4.8.*, 4.9.0
- Gl.inet Mt3000 — versions 4.8.*, 4.9.0
- Gl.inet Mt6000 — versions 4.8.*, 4.9.0
- Gl.inet X3000 — versions 4.8.*, 4.9.0
- Gl.inet Xe3000 — versions 4.8.*, 4.9.0
Weakness classification (CWE)
References
- vuldb.com/vuln/391165 (vdb-entry)
- vuldb.com/vuln/391165/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-19983 (third-party-advisory)
- vuldb.com/submit/873919 (third-party-advisory)
- github.com/gl-inet/CVE-issues/blob/main/4.0.0/NAS Host-header bypass to unauthe… (related)
Frequently asked questions
- What is CVE-2026-19983?
- CVE-2026-19983 is a high-severity vulnerability in Gl.inet A1300, classified under Command Injection. CVSS score: 8.3/10. Published 2026-08-17.
- How severe is CVE-2026-19983?
- High severity. CVSS v3 base score is 8.3 out of 10.