# CVE-2026-12921: Use after free in AzeoTech DAQFactory

> Attackers can execute arbitrary code by tricking users into opening malicious .ctl files in AzeoTech DAQFactory.

- **Severity:** High 8.4 (`CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 25 Jun 2026
- **Updated:** 25 Jun 2026
- **Also known as:** GHSA-3mp5-47hq-xq78

## What is CVE-2026-12921?

CVE-2026-12921 is a high-severity use after free vulnerability in AzeoTech DAQFactory, published on 25 Jun 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

In AzeoTech DAQFactory versions 21.1 and prior, a Use After Free vulnerability can be exploited by an attacker using specially crafted .ctl files which can result in code execution.

Weakness: CWE-416 (Use After Free)

## Which versions are affected by CVE-2026-12921?

It affects 1 product.


Products: Azeotech Daqfactory.

## How do I fix CVE-2026-12921?

No fix has been published for CVE-2026-12921 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-12921 being exploited?

There is no known exploitation of CVE-2026-12921 in the wild and no public exploit code.

## Other vulnerabilities in AzeoTech DAQFactory

- [CVE-2011-3492](https://insights.sbomify.com/CVE-2011-3492/): Memory corruption in n/a (critical 10.0)
- [CVE-2009-4480](https://insights.sbomify.com/CVE-2009-4480/): Memory corruption in n/a (critical 9.3)
- [CVE-2026-12390](https://insights.sbomify.com/CVE-2026-12390/): Access of resource using incompatible type ('type confusion') in AzeoTech DAQFactory (high 8.4)
- [CVE-2025-66588](https://insights.sbomify.com/CVE-2025-66588/): Access of Uninitialized Pointer vulnerability in AzeoTech DAQFactory (high 8.4)
- [CVE-2025-66589](https://insights.sbomify.com/CVE-2025-66589/): Out-of-bounds Read vulnerability in AzeoTech DAQFactory (high 8.4)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-12921 and fix it if it is affected.

What it is: CVE-2026-12921 is a high-severity use after free vulnerability in AzeoTech DAQFactory, published on 25 Jun 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-12921 in the wild and no public exploit code.

Affected product: AzeoTech DAQFactory. 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-2026-12921/ (Markdown: https://insights.sbomify.com/CVE-2026-12921/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-12921
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-12921
- OSV: https://osv.dev/vulnerability/CVE-2026-12921

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-12921/
Summaries are generated and may contain mistakes; the official description above is the record.