---
id: CVE-2023-2374
title: >-
  A security flaw has been discovered in Ubiquiti EdgeRouter X up to
  2.0.9-hotfix.6
summary: >-
  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 comman…
severity: high
cvss: 7.2
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-74
  - CWE-77
vendor: ui
product: er-x_firmware
affected:
  - er-x_firmware < 2.0.9
  - er-x_firmware = 2.0.9
  - er-x-sfp_firmware < 2.0.9
  - er-x-sfp_firmware = 2.0.9
patched:
  - er-x_firmware 2.0.9
  - er-x-sfp_firmware 2.0.9
published: '2023-04-28'
updated: '2026-07-09'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2023-2374'
references:
  - url: 'https://github.com/leetsun/IoT/tree/main/EdgeRouterX/CI/6'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/cve/CVE-2023-2374'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/submit/114075'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/227650'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/227650/cti'
    label: cna@vuldb.com
  - url: 'https://github.com/leetsun/IoT/tree/main/EdgeRouterX/CI/6'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://vuldb.com/?ctiid.227650'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://vuldb.com/?id.227650'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.06857
epssPercentile: 0.93754
ingestedAt: '2026-07-10T01:55:22.876Z'
---

## Overview

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

- `er-x_firmware < 2.0.9`
- `er-x_firmware = 2.0.9`
- `er-x-sfp_firmware < 2.0.9`
- `er-x-sfp_firmware = 2.0.9`

## Remediation

Upgrade past the affected range:

- `er-x_firmware 2.0.9`
- `er-x-sfp_firmware 2.0.9`