CVE Tools
Sign in

CVE-2021-22790

Published: Sep 2, 2021Updated: May 29, 2026 Sources: CVE List NVD BDUCWE-125
NVD MITRE
6.5CVSSMEDIUM
EPSS Score
0.8%
Top 48.1%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

A CWE-125: Out-of-bounds Read vulnerability that could cause a Denial of Service on the Modicon PLC controller / simulator when updating the controller application with a specially crafted project file exists in Modicon M580 CPU (part numbers BMEP* and BMEH*, all versions), Modicon M340 CPU (part numbers BMXP34*, all versions), Modicon MC80 (part numbers BMKC80*, all versions), Modicon Momentum Ethernet CPU (part numbers 171CBU*, all versions), PLC Simulator for EcoStruxureª Control Expert, including all Unity Pro versions (former name of EcoStruxureª Control Expert, all versions), PLC Simulator for EcoStruxureª Process Expert including all HDCS versions (former name of EcoStruxureª Process Expert, all versions), Modicon Quantum CPU (part numbers 140CPU*, all versions), Modicon Premium CPU (part numbers TSXP5*, all versions).

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-125

Affected Products

Modicon M340 CPU BMXP34Schneider ElectricICS / OT / IoT
Modicon M580 CPUSchneider ElectricICS / OT / IoT
Modicon M580 CPU SafetySchneider ElectricICS / OT / IoT
Legacy Modicon QuantumSchneider ElectricICS / OT / IoT
Legacy Modicon PremiumSchneider ElectricICS / OT / IoT
schneider electriccommercialFRICS / OT / IoTaka schneider-electric
and 52 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Collection
View detailed technique mapping

References

https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2021-222-04
download.schneider-electric.com
https://vuldb.com/?id.181982
vuldb.com
https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2021-222-05
download.schneider-electric.com
and 1 more references View all →

Timeline

Published
Sep 2, 2021
Last Updated
May 29, 2026

Unlock Complete Vulnerability Intelligence

Get the full picture for CVE-2021-22790 and every CVE in our database. Create a free account — no credit card required.

Create Free Account
Plain-language analysis
Impact assessment and exploitation scenario in plain English
Attack graph visualization
Interactive attack path and kill chain mapping
Exploit details & PoC links
ExploitDB, Metasploit, GitHub PoCs with direct links
Nuclei scanner templates
Ready-to-use vulnerability scanner templates
Full remediation guide
Patch instructions, workarounds, and compliance impact
Interactive AI chat
Ask questions about this vulnerability in natural language
Related vulnerabilities
Semantically similar CVEs and attack patterns
REST API & MCP access
Integrate vulnerability data into your workflows