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Vulnerability record · CVE-2023-31477 · published 11 May 2023

CVE-2023-31477: Gl-inet gl-s20 firmware path traversal vulnerability

Gl Inet · Gl S20 Firmware

A path traversal issue was discovered on GL.iNet devices before 3.216. Through the file sharing feature, it is possible to share an arbitrary directory, such as /tmp or /etc, because there is no server-side restriction to limit sharing to the USB path.

7.5 CVSS 3.1 High EPSS 0.94% · top 40.6% CWE-22 · Path traversal
7.5CVSS 3.1 base score
0.94%EPSS exploitation probability, 30 days
NoNot in CISA KEV
32Affected product versions listed by NVD
4References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

A path traversal issue was discovered on GL.iNet devices before 3.216. Through the file sharing feature, it is possible to share an arbitrary directory, such as /tmp or /etc, because there is no server-side restriction to limit sharing to the USB path.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected products

32 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/gl-inet/CVE-issues/blob/main/3.215/Path_Traversal.md ExploitThird Party Advisory
https://www.gl-inet.com Vendor Advisory
https://github.com/gl-inet/CVE-issues/blob/main/3.215/Path_Traversal.md ExploitThird Party Advisory
https://www.gl-inet.com Vendor Advisory

Track CVE-2023-31477 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2023-50919GL.iNet router NGINX authentication bypass via Lua pattern matchingGL.iNet devices before firmware 4.5.0 contain an authentication bypass in the NGINX web interface caused by improper Lua string pattern matching. A r…EPSS 48%analysed9.8CVE-2023-50921Gl-inet gl-mt1300 firmware improper privilege management vulnerabilityAn issue was discovered on GL.iNet devices through 4.5.0. Attackers can invoke the add_user interface in the system module to gain root privileges. T…EPSS 0.52%9.8CVE-2023-46454Gl-inet gl-ar300m firmware os command injection vulnerabilityIn GL.iNET GL-AR300M routers with firmware v4.3.7, it is possible to inject arbitrary shell commands through a crafted package name in the package in…EPSS 23%9.8CVE-2023-46456Gl-inet gl-ar300m firmware injection vulnerabilityIn GL.iNET GL-AR300M routers with firmware 3.216 it is possible to inject arbitrary shell commands through the OpenVPN client file upload functionali…EPSS 25%9.8CVE-2023-31475Gl-inet gl-s20 firmware classic buffer overflow vulnerabilityAn issue was discovered on GL.iNet devices before 3.216. The function guci2_get() found in libglutil.so has a buffer overflow when an item is request…EPSS 14%9.8CVE-2023-31471Gl-inet gl-s20 firmware vulnerabilityAn issue was discovered on GL.iNet devices before 3.216. Through the software installation feature, it is possible to install arbitrary software, suc…EPSS 1.1%7.8CVE-2023-50445Gl-inet gl-mt1300 firmware os command injection vulnerabilityShell Injection vulnerability GL.iNet A1300 v4.4.6, AX1800 v4.4.6, AXT1800 v4.4.6, MT3000 v4.4.6, MT2500 v4.4.6, MT6000 v4.5.0, MT1300 v4.3.7, MT300N…EPSS 9.1%7.5CVE-2023-46455GL.iNet GL-AR300M OpenVPN upload path traversal arbitrary file writeGL.iNet GL-AR300M routers running firmware v4.3.7 allow arbitrary file writes via a path traversal flaw in the OpenVPN client file upload feature. Be…EPSS 47%analysed

Source: NIST National Vulnerability Database (record CVE-2023-31477), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.