CVE-2026-12927 Memory corruption in IGSS Definition (Def.exe)
A malicious CGF file can trigger an out-of-bounds write in IGSS Definition, potentially allowing arbitrary code execution or data loss.
- 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
- None listed
What is CVE-2026-12927?
CVE-2026-12927 is a high-severity memory corruption vulnerability in Schneider Electric IGSS Definition (Def.exe), published on 29 Jul 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
CWE-787 Out-of-bounds write vulnerability exists that could cause loss of data or potentially risk arbitrary code execution when a malicious CGF file is imported to IGSS Definition.
Weakness: CWE-787
Which versions are affected by CVE-2026-12927?
How do I fix CVE-2026-12927?
No fix has been published for CVE-2026-12927 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-12927 being exploited?
There is no known exploitation of CVE-2026-12927 in the wild and no public exploit code.
Sources
Also known as GHSA-j7pp-7hqf-vrpv.