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Review reviewHigh

CVE-2023-2373

Ubiquiti EdgeRouter X, edgemax edgerouter firmware, er-x

A vulnerability was identified in Ubiquiti EdgeRouter X up to 2.0.9-hotfix.6. This vulnerability affects unknown code of the component Web Management Interface. Such manipulation of the argument ecn-up leads to command injection. The attack may be performed from remote. The exploit is publicly available and might be used. The actual existence of this vulnerability is currently in question. The vendor position is that post-authentication issues are not accepted as vulnerabilities.

CVSS
7.3
EPSS
7.56%
93.9% percentile
CISA KEV
Not listed
Published
2023.04.28
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability7.56%
Technical severityCVSS 7.3

Vulnerability overview

A vulnerability was identified in Ubiquiti EdgeRouter X up to 2.0.9-hotfix.6. This vulnerability affects unknown code of the component Web Management Interface. Such manipulation of the argument ecn-up leads to command injection. The attack may be performed from remote. The exploit is publicly available and might be used. The actual existence of this vulnerability is currently in question. The vendor position is that post-authentication issues are not accepted as vulnerabilities.

Affected product and versions

Product
Ubiquiti EdgeRouter X, edgemax edgerouter firmware, er-x
Affected versions
2.0.9-hotfix.0, 2.0.9-hotfix.1, 2.0.9-hotfix.2, 2.0.9-hotfix.3, 2.0.9-hotfix.4, 2.0.9-hotfix.5, 2.0.9-hotfix.6, < 2.0.9, 2.0.9
Fixed versions
2.0.9

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Ubiquiti EdgeRouter X, edgemax edgerouter firmware, er-x and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CWE
CWE-74, CWE-77
CVE-2023-2373 — Ubiquiti EdgeRouter X, edgemax edgerouter firmware, er-x | SECUFOCUS NOW