# CVE-2019-12583: Missing authorization in n/a

> Remote attackers can bypass access controls to generate guest accounts, leading to unauthorized network access or denial of service.

- **Severity:** Critical 9.1 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 27 Jun 2019
- **Updated:** 4 Aug 2024
- **Also known as:** CVE-2019-12582, GHSA-cq6f-phq5-pc66

## What is CVE-2019-12583?

CVE-2019-12583 is a critical missing authorization vulnerability in n/a, published on 27 Jun 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Missing Access Control in the "Free Time" component of several Zyxel UAG, USG, and ZyWall devices allows a remote attacker to generate guest accounts by directly accessing the account generator. This can lead to unauthorised network access or Denial of Service.

Weakness: CWE-425 (Direct Request)

## Which versions are affected by CVE-2019-12583?

It affects 14 products.


Products: Zyxel Uag2100 Firmware, Zyxel Uag4100 Firmware, Zyxel Uag5100 Firmware, Zyxel Usg1100 Firmware, Zyxel Usg110 Firmware, Zyxel Usg1900 Firmware, Zyxel Usg210 Firmware, Zyxel Usg2200-Vpn Firmware, Zyxel Usg310 Firmware, Zyxel Zywall 1100 Firmware, Zyxel Zywall 110 Firmware, Zyxel Zywall 310 Firmware, Zyxel Zywall Vpn100 Firmware, Zyxel Zywall Vpn300 Firmware.

## How do I fix CVE-2019-12583?

No fix has been published for CVE-2019-12583 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-12583 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2019-12583 exists.

Public exploit code:

- Zyxel ZyWall UAG/USG - Account Creation Access (nuclei): http/cves/2019/CVE-2019-12583.yaml

## Other vulnerabilities in n/a

- [CVE-2019-12581](https://insights.sbomify.com/CVE-2019-12581/): Cross-site scripting in n/a (medium 6.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-12583 and fix it if it is affected.

What it is: CVE-2019-12583 is a critical missing authorization vulnerability in n/a, published on 27 Jun 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2019-12583 exists.

Affected product: n/a. 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-2019-12583/ (Markdown: https://insights.sbomify.com/CVE-2019-12583/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-12583
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-12583
- OSV: https://osv.dev/vulnerability/CVE-2019-12583

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-12583/
Summaries are generated and may contain mistakes; the official description above is the record.