How severe is CVE-2020-7556?

CVE-2020-7556 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-7556 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-7556?

CVE-2020-7556 affects Schneider-electric Interactive Graphical Scada System. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-7556?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2020-7556 published?

CVE-2020-7556 was published on 2020-11-19 and last updated on 2026-06-17.

CVE-2020-7556

CVE-2020-7556 is a high-severity vulnerability in Schneider-electric Interactive Graphical Scada System with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-787.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 6.8
EPSS exploit prediction: 2% (82nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: Schneider-electric Interactive Graphical Scada System
Published: 2020-11-19
Last modified: 2026-06-17

Description

A CWE-787 Out-of-bounds Write vulnerability exists in IGSS Definition (Def.exe) version 14.0.0.20247 that could cause Remote Code Execution when malicious CGF (Configuration Group File) file is imported to IGSS Definition.

Frequently asked questions

What is CVE-2020-7556?: A CWE-787 Out-of-bounds Write vulnerability exists in IGSS Definition (Def.exe) version 14.0.0.20247 that could cause Remote Code Execution when malicious CGF (Configuration Group File) file is imported to IGSS Definition.
How severe is CVE-2020-7556?: CVE-2020-7556 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-7556 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-7556?: CVE-2020-7556 affects Schneider-electric Interactive Graphical Scada System. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-7556?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2020-7556 published?: CVE-2020-7556 was published on 2020-11-19 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:schneider-electric:interactive_graphical_scada_system:*:*:*:*:*:*:*:*

More vulnerabilities in Schneider-electric Interactive Graphical Scada System

CVE-2013-0657 — Critical (CVSS 10.0): Stack-based buffer overflow in Schneider Electric Interactive Graphical SCADA System (IGSS) 10 and earlier allows…
CVE-2022-2329 — Critical (CVSS 9.8): A CWE-190: Integer Overflow or Wraparound vulnerability exists that could cause heap-based buffer overflow, leading to…
CVE-2022-24324 — Critical (CVSS 9.8): A CWE-120: Buffer Copy without Checking Size of Input vulnerability exists that could cause a stack-based buffer…
CVE-2022-32529 — Critical (CVSS 9.8): A CWE-120: Buffer Copy without Checking Size of Input vulnerability exists that could cause a stack-based buffer…
CVE-2022-32527 — Critical (CVSS 9.8): A CWE-120: Buffer Copy without Checking Size of Input vulnerability exists that could cause a stack-based buffer…
CVE-2022-32526 — Critical (CVSS 9.8): A CWE-120: Buffer Copy without Checking Size of Input vulnerability exists that could cause a stack-based buffer…

All CVEs affecting Schneider-electric Interactive Graphical Scada System →

Other CWE-787 (Out-of-bounds Write) vulnerabilities

CVE-2026-42369 — Critical (CVSS 10.0): GV-VMS V20 is a Video Monitoring Software used to gather the feeds of many surveillance cameras and manage other…
CVE-2026-4746 — Critical (CVSS 10.0): Out-of-bounds Write vulnerability in timeplus-io proton (base/poco/Foundation/src‎ modules). This vulnerability is…
CVE-2025-43300 — Critical (CVSS 10.0): An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 15.8.5 and iPadOS…
CVE-2025-24201 — Critical (CVSS 10.0): An out-of-bounds write issue was addressed with improved checks to prevent unauthorized actions. This issue is fixed in…
CVE-2024-42479 — Critical (CVSS 10.0): llama.cpp provides LLM inference in C/C++. The unsafe `data` pointer member in the `rpc_tensor` structure can cause…
CVE-2024-39791 — Critical (CVSS 10.0): Stack-based buffer overflow vulnerabilities affecting Vonets industrial wifi bridge relays and wifi bridge…

Browse all CWE-787 (Out-of-bounds Write) vulnerabilities →