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CVE-2023-2374: Ubiquiti EdgeRouter X Web Management command injection

• Severity: high (CVSS 7.2 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 6.9% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2023-04-28 · updated 2026-07-09
• Weakness: CWE-74

Description

A security flaw has been discovered in Ubiquiti EdgeRouter X up to 2.0.9-hotfix.6. This issue affects some unknown processing of the component Web Management Interface. Performing a manipulation of the argument ecn-down results in command injection. It is possible to initiate the attack remotely. The exploit has been released to the public and may be used for attacks. The existence of this vulnerability is still disputed at present. The vendor position is that post-authentication issues are not accepted as vulnerabilities.

Affected products

• Ui Er-X-Sfp Firmware: before 2.0.9; 2.0.9, 2.0.9-hotfix2, 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/CI/6
• https://vuldb.com/cve/CVE-2023-2374
• https://vuldb.com/submit/114075
• https://vuldb.com/vuln/227650
• https://vuldb.com/vuln/227650/cti
• https://github.com/leetsun/IoT/tree/main/EdgeRouterX/CI/6
• https://vuldb.com/?ctiid.227650
• https://vuldb.com/?id.227650

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