# CVE-2026-12921: AzeoTech DAQFactory Use After Free in .ctl file parsing

Source: https://junglewise.ai/threats/cve-2026-12921-azeotech-daqfactory-use-after-free-in-ctl-file-parsing  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-25. Updated: 2026-06-25  
License: CC BY 4.0 with a link back

CVE-2026-12921 · Severity: info · CVSS 8.4 · Published 2026-06-25

AzeoTech DAQFactory, a software suite used for data acquisition and industrial automation, is vulnerable to a security flaw when processing project files. An attacker could trick a user into opening a specially crafted .ctl file, which could allow the attacker to take control of the system or execute unauthorized commands. This could lead to a complete loss of confidentiality and integrity on the workstation used to manage industrial processes.

Technologies: [Azeotech Daqfactory](https://junglewise.ai/threats/technologies/daqfactory). Vendors: [Azeotech](https://junglewise.ai/threats/vendors/azeotech).

## Quick answers

**Is CVE-2026-12921 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-12921 being exploited in the wild.

**How severe is CVE-2026-12921?** Informational severity, with a CVSS score of 8.4, published 25 June 2026.

**Which products and versions are affected?** Azeotech Daqfactory 21.1 and prior.

**Is there a fix for CVE-2026-12921?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-12921 attacked?** It is attacked with local access, in a network appliance.

**Am I affected by CVE-2026-12921?** Check whether you run Azeotech Daqfactory at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A Use After Free (CWE-416) vulnerability exists in AzeoTech DAQFactory versions 21.1 and prior. The flaw is triggered when the application improperly manages memory while parsing specially crafted .ctl files. An attacker can exploit this by convincing a user to open a malicious file, leading to memory corruption and potentially arbitrary code execution with the privileges of the application. While the NVD entry focuses on Use After Free, related CISA documentation also mentions Type Confusion (CWE-843) in the same version range. Mitigation strategies include operating in 'Safe Mode' when loading untrusted documents and restricting write access to folders containing .ctl files.

## Affected products

- AzeoTech DAQFactory 21.1 and prior

## Timeline

- 2026-06-18: advisory: Initial CISA ICS Advisory published
- 2026-06-25: disclosed: CVE published to NVD dataset

## References

- [https://www.cisa.gov/news-events/ics-advisories/icsa-26-169-02](https://www.cisa.gov/news-events/ics-advisories/icsa-26-169-02)

## Related threats

- [AzeoTech DAQFactory type confusion via .ctl files](https://junglewise.ai/threats/cve-2026-12390-azeotech-daqfactory-type-confusion-via-ctl-files)
- [AzeoTech DAQFactory out-of-bounds write in .ctl file parsing](https://junglewise.ai/threats/cve-2025-66590-azeotech-daqfactory-out-of-bounds-write-in-ctl-file-parsing)
- [In AzeoTech DAQFactory release 20.7 (Build 2555), an Out-of-bounds Read vulnerability can be exploited by an attacker…](https://junglewise.ai/threats/cve-2025-66589-in-azeotech-daqfactory-release-20-7-build-2555-an-out-of-bounds)
- [AzeoTech DAQFactory uninitialized pointer access](https://junglewise.ai/threats/cve-2025-66588-azeotech-daqfactory-uninitialized-pointer-access)
- [AzeoTech DAQFactory type confusion in .ctl file parsing](https://junglewise.ai/threats/cve-2025-66586-azeotech-daqfactory-type-confusion-in-ctl-file-parsing)