Quick answers
- Is CVE-2026-12927 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-12927 being exploited in the wild.
- How severe is CVE-2026-12927?
- Informational severity, with a CVSS score of 8.4, published 29 July 2026.
- Which products and versions are affected?
- Schneider Electric IGSS Definition Version 18.0.0.26124 and prior.
- Is there a fix for CVE-2026-12927?
- 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-2026-12927 attacked?
- It is attacked with local access, in a network appliance.
- Am I affected by CVE-2026-12927?
- Check whether you run Schneider Electric IGSS Definition 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
An out-of-bounds write vulnerability (CWE-787) exists in the IGSS Definition component (Def.exe) of Schneider Electric IGSS. The flaw is triggered during the import of a malicious CGF (Configuration) file. An attacker can exploit this by crafting a file that causes the application to write data beyond the boundaries of allocated memory buffers. This requires local access to the system and user interaction to initiate the import process. Successful exploitation can result in memory corruption, leading to a denial-of-service condition or arbitrary code execution with the privileges of the application.
Affected products
- Schneider Electric IGSS Definition (Def.exe) Version 18.0.0.26124 and prior
Timeline
- 2026-07-29: disclosed
- 2026-07-29: advisory