# CVE-2023-23912: Code injection in Ubiquiti EdgeRouter(s) and USG(s)

> Attackers on the WAN interface can achieve remote code execution on Ubiquiti EdgeRouters and USGs when DHCPv6 prefix delegation is enabled.

- **Severity:** High 8.8 (`CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 9 Feb 2023
- **Updated:** 24 Mar 2025
- **Also known as:** GHSA-f52w-ff63-7f4c

## What is CVE-2023-23912?

CVE-2023-23912 is a high-severity code injection vulnerability in Ubiquiti EdgeRouter(s) and USG(s), published on 9 Feb 2023. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A vulnerability, found in EdgeRouters Version 2.0.9-hotfix.5 and earlier and UniFi Security Gateways (USG) Version 4.4.56 and earlier with their DHCPv6 prefix delegation set to dhcpv6-stateless or dhcpv6-stateful, allows a malicious actor directly connected to the WAN interface of an affected device to create a remote code execution vulnerability.

Weakness: CWE-94 (Improper Control of Generation of Code), CWE-75 (Failure to Sanitize Special Elements into a Different Plane)

## Which versions are affected by CVE-2023-23912?

It affects 10 products.


Products: Ui Er-10x Firmware, Ui Er-12 Firmware, Ui Er-12p Firmware, Ui Er-4 Firmware, Ui Er-6p Firmware, Ui Er-8-Xg Firmware, Ui Er-X-Sfp Firmware, Ui Er-X Firmware, Ui Usg-Pro-4 Firmware, Ui Usg Firmware.

## How do I fix CVE-2023-23912?

No fix has been published for CVE-2023-23912 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-23912 being exploited?

There is no known exploitation of CVE-2023-23912 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-23912 and fix it if it is affected.

What it is: CVE-2023-23912 is a high-severity code injection vulnerability in Ubiquiti EdgeRouter(s) and USG(s), published on 9 Feb 2023. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2023-23912 in the wild and no public exploit code.

Affected product: Ubiquiti EdgeRouter(s) and USG(s). No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2023-23912/ (Markdown: https://insights.sbomify.com/CVE-2023-23912/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-23912
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-23912
- OSV: https://osv.dev/vulnerability/CVE-2023-23912

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-23912/
Summaries are generated and may contain mistakes; the official description above is the record.