Review reviewHigh

CVE-2023-2377

Ubiquiti EdgeRouter X, er-x firmware, er-x

A vulnerability was detected in Ubiquiti EdgeRouter X up to 2.0.9-hotfix.6. The impacted element is an unknown function of the component Web Management Interface. The manipulation of the argument Name results in command injection. The attack can be launched remotely. The exploit is now public and may be used. There is ongoing doubt regarding the real existence of this vulnerability. The vendor position is that post-authentication issues are not accepted as vulnerabilities.

CVSS: 7.3
EPSS: 7.56%
CISA KEV: Not listed
Published: 2023.04.29

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

Affected product and versions

Product: Ubiquiti EdgeRouter X, er-x 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
Identify
Confirm that Ubiquiti EdgeRouter X, er-x firmware, er-x and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
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