A CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability exists in IGSS Definition (Def.exe) version…

published 2020-11-19 5 y ago modified 2026-06-17 4 mo ago also EUVD-2020-28675

cvss: 7.8; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 2.5%; EPSS 2.5% chance of exploitation in 30 days, percentile 84%
public exploits: 0; none known

A CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability exists in IGSS Definition (Def.exe) version 14.0.0.20247 and prior that could cause Remote Code Execution when malicious CGF (Configuration Group File) file is imported to IGSS Definition.

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-20-324-04 updated 2020-11-17 cvss 7.8

Schneider Electric Interactive Graphical SCADA System (IGSS)

Schneider Electric Software, LLC IGSS Definition (Def.exe) <= 14.0.0.20247
affected: mitigation “Schneider Electric has provided a new version of the IGSS Definition module to address these vulnerabilities. Users are recommended to update to IGSS Version 14.0.0.20248” igss.schneider-electric.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

Exploit prediction

2.49% chance of exploitation in the next 30 days, higher than 84% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
NVD	3.1	7.8	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD	2.0	6.8	AV:N/AC:M/Au:N/C:P/I:P/A:P

Affected products

n/a IGSS Definition (Def.exe) version 14.0.0.20247 and prior

Classification

Weakness

CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

se.com /ww/en/download/document/SEVD-2020-315-03/
vendor-advisory
zerodayinitiative.com /advisories/ZDI-21-092/
third-party-advisory, vdb-entry

Sources

CVE List CVE-2020-7550
NVD CVE-2020-7550

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary