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Fencer Vulns
critical 9.8

CVE-2023-31471 json

An issue was discovered on GL.iNet devices before 3.216.

published 2023-05-10 3 y ago modified 2026-06-17 4 mo ago also EUVD-2023-35776

cvss
9.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.1%
EPSS 1.1% chance of exploitation in 30 days, percentile 64%
public exploits
0
none known

Summary

An issue was discovered on GL.iNet devices before 3.216. Through the software installation feature, it is possible to install arbitrary software, such as a reverse shell, because the restrictions on the available package list are limited to client-side verification. It is possible to install software from the filesystem, the package list, or a URL.

Patch / fix

  • 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

CISA SSVC

Exploitation
Proof of concept is public
Automatable
yes
Technical impact
total
Assessed
21 mo ago

Exploit prediction

1.05% chance of exploitation in the next 30 days, higher than 64% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/gl-inet/CVE-issues/blob/main/3.215/Abuse_of_Functionality_leads_to_RCE.md referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CISA ADP 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Sources

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.