Code execution via malicious CGF import
Published Jul 29, 2026 · Updated Jul 29, 2026
Out-of-bounds write in Schneider Electric IGSS Definition 18.0.0.26124 and earlier allows attackers to execute code via a malicious CGF file. Def.exe's CGF import path writes outside a memory buffer while parsing a crafted file; Schneider Electric has not disclosed the responsible parser or malformed field. Execution requires a local user to actively import the file, after which memory corruption can execute attacker-controlled code or destroy Definition data.
Summary
What happened
Out-of-bounds write in Schneider Electric IGSS Definition 18.0.0.26124 and earlier allows attackers to execute code via a malicious CGF file. Def.exe's CGF import path writes outside a memory buffer while parsing a crafted file; Schneider Electric has not disclosed the responsible parser or malformed field. Execution requires a local user to actively import the file, after which memory corruption can execute attacker-controlled code or destroy Definition data.
The record
- CVE
- CVE-2026-12927
- Published
- Jul 29, 2026
- Updated
- Jul 29, 2026
- Vendor
- Distributed Data Systems
- Product
- IGSS Definition
- Classifications
- CWE-787, T1204.002
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 29, 2026CVE publishedPublication date reported by the CVE source.
- Jul 29, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=Version 18.0.0.26124 and prior
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo