CVE-2023-50921: Gl-inet Gl-a1300 Firmware privilege escalation (CVSS 9.8)

Description

An 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. This affects A1300 4.4.6, AX1800 4.4.6, AXT1800 4.4.6, MT3000 4.4.6, MT2500 4.4.6, MT6000 4.5.0, MT1300 4.3.7, MT300N-V2 4.3.7, AR750S 4.3.7, AR750 4.3.7, AR300M 4.3.7, and B1300 4.3.7.

CVSS 3.1 breakdown

Attack vectorNetwork

Attack complexityLow

Privileges requiredNone

User interactionNone

ScopeUnchanged

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Affected products

Gl-inet Gl-a1300 Firmware4.4.6

Gl-inet Gl-ar300m Firmware4.3.7

Gl-inet Gl-ar750 Firmware4.3.7

Gl-inet Gl-ar750s Firmware4.3.7

Gl-inet Gl-ax1800 Firmware4.4.6

Gl-inet Gl-axt1800 Firmware4.4.6

Gl-inet Gl-b1300 Firmware4.3.7

Gl-inet Gl-mt1300 Firmware4.3.7

Gl-inet Gl-mt2500 Firmware4.4.6

Gl-inet Gl-mt3000 Firmware4.4.6

Gl-inet Gl-mt300n-v2 Firmware4.3.7

Gl-inet Gl-mt6000 Firmware4.5.0

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

References

https://github.com/gl-inet/CVE-issues/blob/main/4.0.0/Add_user_vulnerability.mdThird Party Advisory

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

Frequently asked

Is CVE-2023-50921 being actively exploited?

CVE-2023-50921 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.52%.

How severe is CVE-2023-50921?

CVE-2023-50921 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 0.52% probability of exploitation.

Which products are affected by CVE-2023-50921?

Affected products include Gl-inet Gl-a1300 Firmware, Gl-inet Gl-ar300m Firmware, Gl-inet Gl-ar750 Firmware, Gl-inet Gl-ar750s Firmware, Gl-inet Gl-ax1800 Firmware, and 7 more.

How do I fix CVE-2023-50921?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2023-50921 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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