GL.iNet XE3000 NAS Command Service gl_nas_sys os command injection

published 2026-08-17 2 mo ago modified 2026-08-20 2 mo ago also EUVD-2026-60046

cvss: 8.3; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 2.1%; EPSS 2.1% chance of exploitation in 30 days, percentile 81%
public exploits: 0; none known

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."

Patch / fix

fixed in 8

GL.iNet A1300 4.9.0
GL.iNet AX1800 4.9.0
GL.iNet AXT1800 4.9.0
GL.iNet MT2500 4.9.0
GL.iNet MT3000 4.9.0
GL.iNet MT6000 4.9.0
GL.iNet X3000 4.9.0
GL.iNet XE3000 4.9.0

CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: partial
Assessed: 2 mo ago (2026-08-17)

Exploit prediction

2.06% chance of exploitation in the next 30 days, higher than 81% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	4.0	6.9	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/E:X
CNA	3.1	8.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L/E:X/RL:O/RC:C
CNA	3.0	8.3	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L/E:X/RL:O/RC:C
CNA	2.0	7.5	AV:N/AC:L/Au:N/C:P/I:P/A:P/E:ND/RL:OF/RC:C
CNA	4.0	6.9	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/E:X/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
CNA	3.1	8.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L
CNA	2.0	7.5	AV:N/AC:L/Au:N/C:P/I:P/A:P

Affected products

GL.iNet A1300
GL.iNet AX1800
GL.iNet AXT1800
GL.iNet MT2500
GL.iNet MT3000
GL.iNet MT6000
GL.iNet X3000
GL.iNet XE3000

Classification

Weakness

CWE-78 Improper Neutralization of Special Elements used in an OS Command
CWE-77 Improper Neutralization of Special Elements used in a Command

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%20Host-header%20bypass%20to%20unauthenticated%20root%20RCE.md
related

Sources

CVE List CVE-2026-19983
NVD CVE-2026-19983

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary