How severe is CVE-2023-50921?

CVE-2023-50921 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-50921 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (40th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-50921?

CVE-2023-50921 primarily affects Gl-inet Gl-mt1300 Firmware. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-50921?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2023-50921 have an EU (EUVD) identifier?

Yes. CVE-2023-50921 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-55652.

When was CVE-2023-50921 published?

CVE-2023-50921 was published on 2024-01-03 and last updated on 2026-06-17.

CVE-2023-50921

CVE-2023-50921 is a critical-severity vulnerability in Gl-inet Gl-mt1300 Firmware with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-269.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (40th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2023-55652
Weakness: CWE-269
Affected product: Gl-inet Gl-mt1300 Firmware
Published: 2024-01-03
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2023-50921?: 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.
How severe is CVE-2023-50921?: CVE-2023-50921 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-50921 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (40th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-50921?: CVE-2023-50921 primarily affects Gl-inet Gl-mt1300 Firmware. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-50921?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2023-50921 have an EU (EUVD) identifier?: Yes. CVE-2023-50921 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-55652.
When was CVE-2023-50921 published?: CVE-2023-50921 was published on 2024-01-03 and last updated on 2026-06-17.

References

https://github.com/gl-inet/CVE-issues/blob/main/4.0.0/Add_user_vulnerability.md

Affected products (12)

cpe:2.3:o:gl-inet:gl-mt1300_firmware:4.3.7:*:*:*:*:*:*:*
cpe:2.3:o:gl-inet:gl-mt300n-v2_firmware:4.3.7:*:*:*:*:*:*:*
cpe:2.3:o:gl-inet:gl-ar750s_firmware:4.3.7:*:*:*:*:*:*:*
cpe:2.3:o:gl-inet:gl-ar750_firmware:4.3.7:*:*:*:*:*:*:*
cpe:2.3:o:gl-inet:gl-ar300m_firmware:4.3.7:*:*:*:*:*:*:*
cpe:2.3:o:gl-inet:gl-b1300_firmware:4.3.7:*:*:*:*:*:*:*
cpe:2.3:o:gl-inet:gl-mt6000_firmware:4.5.0:*:*:*:*:*:*:*
cpe:2.3:o:gl-inet:gl-a1300_firmware:4.4.6:*:*:*:*:*:*:*
cpe:2.3:o:gl-inet:gl-ax1800_firmware:4.4.6:*:*:*:*:*:*:*
cpe:2.3:o:gl-inet:gl-axt1800_firmware:4.4.6:*:*:*:*:*:*:*
cpe:2.3:o:gl-inet:gl-mt3000_firmware:4.4.6:*:*:*:*:*:*:*
cpe:2.3:o:gl-inet:gl-mt2500_firmware:4.4.6:*:*:*:*:*:*:*

More vulnerabilities in Gl-inet Gl-mt1300 Firmware

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CVE-2023-50445 — High (CVSS 7.8): Shell 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…
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