CVE-2024-39227 is a critical-severity flaw (CVSS 9.8) affecting mt6000 firmware, a1300 firmware, x300b firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
GL-iNet products AR750/AR750S/AR300M/AR300M16/MT300N-V2/B1300/MT1300/SFT1200/X750 v4.3.11, MT3000/MT2500/AXT1800/AX1800/A1300/X300B v4.5.16, XE300 v4.3.16, E750 v4.3.12, AP1300/S1300 v4.3.13, and XE3000/X3000 v4.4 were discovered to contain insecure permissions in the endpoint /cgi-bin/glc. This vulnerability allows unauthenticated attackers to execute arbitrary code or possibly a directory traversal via crafted JSON data.
Why this priority
Critical severity
Public exploit reference
Remotely exploitable, no login, no user action
No fix is published yet: follow the downgrade or mitigation steps.
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
Published CVE record published
Updated Record last modified
gl-inet mt6000 firmware MITIGATE
Affected: 4.5.8
Fixed in: no fixed release known
Safe to downgrade to: a release before 4.5.8
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
gl-inet a1300 firmware MITIGATE
Affected: 4.5.16
Fixed in: no fixed release known
Safe to downgrade to: a release before 4.5.16
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
gl-inet x300b firmware MITIGATE
Affected: 4.5.16
Fixed in: no fixed release known
Safe to downgrade to: a release before 4.5.16
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
gl-inet ax1800 firmware MITIGATE
Affected: 4.5.16
Fixed in: no fixed release known
Safe to downgrade to: a release before 4.5.16
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
gl-inet axt1800 firmware MITIGATE
Affected: 4.5.16
Fixed in: no fixed release known
Safe to downgrade to: a release before 4.5.16
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
gl-inet mt2500 firmware MITIGATE
Affected: 4.5.16
Fixed in: no fixed release known
Safe to downgrade to: a release before 4.5.16
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
Verify at the official sourceNVD · CVE Program · Report a problem with this page Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2024-39227?
mt6000 firmware: mitigate or apply the listed mitigation; a1300 firmware: mitigate or apply the listed mitigation; x300b firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.
Is CVE-2024-39227 being exploited?
CVE-2024-39227 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2024-39227 affect?
CVE-2024-39227 affects mt6000 firmware, a1300 firmware, x300b firmware. Severity is critical (CVSS 9.8). GL-iNet products AR750/AR750S/AR300M/AR300M16/MT300N-V2/B1300/MT1300/SFT1200/X750 v4.3.11, MT3000/MT2500/AXT1800/AX1800/A1300/X300B v4.5.16, XE300 v4.3.16, E750 v4.3.12, AP1300/S1300 v4.3.13, and XE3000/X3000 v4.4 were discovered to contain
How urgent is CVE-2024-39227?
Priority 61/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action
Related CVEs
CVE-2024-45263HIGH 8.8MITIGATEUPGRADE An issue was discovered on certain GL-iNet devices, including MT6000, MT3000, MT2500, AXT1800, and AX1800 4.6.
CVE-2024-45260HIGH 8.0MITIGATEMITIGATE An issue was discovered on certain GL-iNet devices, including MT6000, MT3000, MT2500, AXT1800, and AX1800 4.6.
CVE-2024-39229MEDIUM 5.3MITIGATEMITIGATE An issue in GL-iNet products AR750/AR750S/AR300M/AR300M16/MT300N-V2/B1300/MT1300/SFT1200/X750 v4.3.11, MT3000/
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