Buffer overflow in PLC Simulator on EcoStruxureª Control Expert
Priority LOW 37CWE-120Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-120 and the CVSS impact.
Summary
A CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') vulnerability exists in PLC Simulator on EcoStruxureª Control Expert (now Unity Pro) (all versions) that could cause a crash of the PLC simulator present in EcoStruxureª Control Expert software when receiving a specially crafted request over Modbus.
Why it matters now
EPSS 0.01905 79th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | PLC Simulator on EcoStruxureª Control Expert (now Unity Pro) (all versions) | PLC Simulator on EcoStruxureª Control Expert (now Unity Pro) (all versions) | — | No fix listed | CNA |
- PLC Simulator on EcoStruxureª Control Expert (now Unity Pro) (all versions) Vendor— Affected PLC Simulator on EcoStruxureª Control Expert (now Unity Pro) (all versions) Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:schneider-electric:ecostruxure_control_expert:*:*:*:*:*:*:*:* | all versions | Vulnerable | Schneider Electric |
- cpe:2.3:a:schneider-electric:ecostruxure_control_expert:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Schneider Electric
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2020-7559
- 2026-10-03 Alias added: GHSA-28rp-9f44-h4v6
References
More Schneider Electric Ecostruxure Control Expert vulnerabilities
- TI-2021-05677 Path traversal in Schneider Electric EcoStruxure Control Expert CVSS 3.1HIGH 7.8
- TI-2022-09848 A heap-based buffer overflow exists in XML Decompression DecodeTreeBlock in AT&T Labs… CVSS 3.1CRITICAL 9.8
- TI-2021-05659 Authentication bypass by spoofing in EcoStruxure Control Expert , EcoStruxure Control… CVSS 3.1CRITICAL 9.1
- TI-2020-17142 Missing brute-force protection in PLC Simulator on EcoStruxureª Control Expert CVSS 3.1CRITICAL 9.8
- TI-2022-22597 Authentication bypass by capture-replay in Schneider Electric EcoStruxure Control Expert CVSS 3.1CRITICAL 9.8
- TI-2022-22596 Improper check for unusual conditions in Schneider Electric EcoStruxure Control Expert CVSS 3.1CRITICAL 9.8
Sources
- CVE-2020-7559 · CVE Program
- CVE-2020-7559 · NVD
- FIRST EPSS
- GHSA-28rp-9f44-h4v6 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences