Security readout for executives and security teams
Plain-English summary
This flaw can let a malicious IGSS Configuration Group File trigger code execution when imported into IGSS Definition. The risk is concentrated on engineering or operator workstations that open project files. There is no evidence in the provided sources of active exploitation, and no CVSS score is included.
Executive priority
Treat this as a priority for OT and engineering workstation owners. The known path requires opening a malicious configuration file, but successful exploitation could execute code on systems that may manage industrial configurations.
Technical view
CVE-2020-7558 is a CWE-787 out-of-bounds write in IGSS Definition Def.exe version 14.0.0.20247 and prior. The described trigger is importing a malicious CGF file into IGSS Definition, which could cause remote code execution in the application context.
Likely exposure
Exposure is likely limited to environments running IGSS Definition Def.exe version 14.0.0.20247 or earlier, especially systems where users import CGF project or configuration files from email, vendors, contractors, backups, or shared repositories.
Exploitation context
The provided sources describe malicious file import as the attack path. KEV is false, and the bundle provides no cited evidence of exploitation in the wild, public weaponization, network-only exploitation, or unauthenticated exploitation.
Researcher notes
Evidence is limited to the CVE description, Schneider Electric advisory reference, and ZDI advisory reference. The bundle does not provide CVSS details, patch version text, exploit telemetry, or a complete affected CPE list, so validation should start with vendor advisory confirmation.
Mitigation direction
- Identify IGSS Definition installations and versions across engineering workstations.
- Check Schneider Electric advisory SEVD-2020-315-03 for vendor remediation guidance.
- Restrict importing CGF files to trusted, verified sources only.
- Quarantine and review externally supplied CGF files before use.
- Limit IGSS workstation privileges and isolate engineering environments where feasible.
Validation and detection
- Inventory Def.exe versions and flag 14.0.0.20247 or prior.
- Review recent CGF imports from email, removable media, contractors, and shared folders.
- Confirm whether Schneider Electric guidance has been applied.
- Check endpoint telemetry for unexpected Def.exe crashes or child processes.
- Verify users understand CGF files are not safe by default.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-787: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2020-7558 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://www.se.com/ww/en/download/document/SEVD-2020-315-03/CVE reference · x_refsource_MISC
- https://www.zerodayinitiative.com/advisories/ZDI-21-091/CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Out-of-bounds Write
Out-of-bounds Write represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.