CVE-2023-31475

Name: CVE-2023-31475
Creator: NVD / NIST
Published: 2023-05-11T11:15:09.147+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 13.74%

Last modified Jun 17, 2026

CVE-2023-31475 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. An 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 requested from a UCI context, and the value is pasted into a char pointer to a buffer without checking the size of the buffer.. EPSS estimates a 13.74% chance of exploitation in the next 30 days.

Description

An 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 requested from a UCI context, and the value is pasted into a char pointer to a buffer without checking the size of the buffer.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

13.74%

96.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Gl-Inet	Gl-S20 Firmware	< 3.216
Gl-Inet	Gl-X3000 Firmware	< 3.216
Gl-Inet	Gl-Mt3000 Firmware	< 3.216
Gl-Inet	Gl-Mt2500 Firmware	< 3.216
Gl-Inet	Gl-Mt2500a Firmware	< 3.216
Gl-Inet	Gl-Axt1800 Firmware	< 3.216
Gl-Inet	Gl-A1300 Firmware	< 3.216
Gl-Inet	Gl-Ax1800 Firmware	< 3.216
Gl-Inet	Gl-Sft1200 Firmware	< 3.216
Gl-Inet	Gl-Mt1300 Firmware	< 3.216
Gl-Inet	Gl-E750 Firmware	< 3.216
Gl-Inet	Gl-Mv1000 Firmware	< 3.216
Gl-Inet	Gl-Mv1000w Firmware	< 3.216
Gl-Inet	Gl-S10 Firmware	< 3.216
Gl-Inet	Gl-S200 Firmware	< 3.216
Gl-Inet	Gl-S1300 Firmware	< 3.216
Gl-Inet	Gl-Sf1200 Firmware	< 3.216
Gl-Inet	Gl-B1300 Firmware	< 3.216
Gl-Inet	Gl-B2200 Firmware	< 3.216
Gl-Inet	Gl-Ap1300 Firmware	< 3.216
Gl-Inet	Gl-Ap1300lte Firmware	< 3.216
Gl-Inet	Gl-X1200 Firmware	< 3.216
Gl-Inet	Gl-X750 Firmware	< 3.216
Gl-Inet	Gl-X300b Firmware	< 3.216
Gl-Inet	Gl-Xe300 Firmware	< 3.216
Gl-Inet	Gl-Ar750s Firmware	< 3.216
Gl-Inet	Gl-Ar750 Firmware	< 3.216
Gl-Inet	Gl-Mifi Firmware	< 3.216
Gl-Inet	Gl-Mt300n-V2 Firmware	< 3.216
Gl-Inet	Gl-Ar300m Firmware	< 3.216
Gl-Inet	Gl-Usb150 Firmware	< 3.216
Gl-Inet	Microuter-N300 Firmware	< 3.216

References

https://github.com/gl-inet/CVE-issues/blob/main/3.215/Buffer_Overflow.mdExploit, Third Party Advisory
https://justinapplegate.me/2023/glinet-CVE-2023-31475/
https://www.gl-inet.comVendor Advisory
https://github.com/gl-inet/CVE-issues/blob/main/3.215/Buffer_Overflow.mdExploit, Third Party Advisory
https://justinapplegate.me/2023/glinet-CVE-2023-31475/
https://www.gl-inet.comVendor Advisory

Timeline

Published: May 11, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-31475?

How severe is CVE-2023-31475?

CVE-2023-31475 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 13.74% probability of exploitation in the next 30 days.

How do I fix CVE-2023-31475?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-31475?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST