What’s Vulnerable › Vulnerabilities

CVE-2023-2379: Ubiquiti EdgeRouter X Web Service denial of service

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2023-04-28 · updated 2026-06-17
• Weakness: CWE-404

Description

A vulnerability classified as critical has been found in Ubiquiti EdgeRouter X up to 2.0.9-hotfix.6. This affects an unknown part of the component Web Service. The manipulation leads to denial of service. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. The associated identifier of this vulnerability is VDB-227655.

Affected products

• Ui Er-X-Sfp Firmware: before 2.0.9; 2.0.9, 2.0.9-hotfix2, 2.0.9-hotfix3, 2.0.9-hotfix4, 2.0.9-hotfix5, 2.0.9-hotfix6 — fixed in 2.0.9
• Ui Er-X Firmware: before 2.0.9; 2.0.9, 2.0.9-hotfix2, 2.0.9-hotfix3, 2.0.9-hotfix4, 2.0.9-hotfix5, 2.0.9-hotfix6 — fixed in 2.0.9

How to fix

Upgrade to a fixed version: Ui Er-X-Sfp Firmware 2.0.9; Ui Er-X Firmware 2.0.9. Check the vendor advisory for mitigations.

References

• https://github.com/leetsun/IoT/tree/main/EdgeRouterX/DoS
• https://vuldb.com/?ctiid.227655
• https://vuldb.com/?id.227655
• https://github.com/leetsun/IoT/tree/main/EdgeRouterX/DoS
• https://vuldb.com/?ctiid.227655
• https://vuldb.com/?id.227655

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