CVE-2023-23912

Network-adjacent root code execution via dhcp6c command injection

Published Feb 9, 2023 · Updated Mar 24, 2025

Command injection in Ubiquiti EdgeRouters 2.0.9-hotfix.5 and earlier and USG 4.4.56 and earlier allows attackers to execute root code via the WAN. The dhcp6c daemon passes an inadequately validated attacker-supplied string to a system call, enabling command injection. Exploitation requires stateful or stateless DHCPv6 prefix delegation and direct WAN connectivity; injected code runs with root privileges.

CVSS severity8.8
High
EPSS probability0.89%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Command injection in Ubiquiti EdgeRouters 2.0.9-hotfix.5 and earlier and USG 4.4.56 and earlier allows attackers to execute root code via the WAN. The dhcp6c daemon passes an inadequately validated attacker-supplied string to a system call, enabling command injection. Exploitation requires stateful or stateless DHCPv6 prefix delegation and direct WAN connectivity; injected code runs with root privileges.

The record

CVE
CVE-2023-23912
Published
Feb 9, 2023
Updated
Mar 24, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-94, CWE-75, T1059
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 9, 2023CVE publishedPublication date reported by the CVE source.
  2. Mar 24, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.8NVDCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.8CISA-ADPCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
CWE-75Failure to Sanitize Special Elements into a Different Plane (Special Element Injection)
T1059Command and Scripting Interpreter

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo