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CVE-2021-22788

Published: Feb 11, 2022Updated: May 29, 2026 Sources: CVE List NVD BDUCWE-787
NVD MITRE
7.5CVSSHIGH
EPSS Score
1.0%
Top 41.4%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

A CWE-787: Out-of-bounds Write vulnerability exists that could cause denial of service when an attacker sends a specially crafted HTTP request to the web server of the device. Affected Product: Modicon M340 CPUs: BMXP34 (Versions prior to V3.40), Modicon M340 X80 Ethernet Communication Modules: BMXNOE0100 (H), BMXNOE0110 (H), BMXNOC0401, BMXNOR0200H RTU (All Versions), Modicon Premium Processors with integrated Ethernet (Copro): TSXP574634, TSXP575634, TSXP576634 (All Versions), Modicon Quantum Processors with Integrated Ethernet (Copro): 140CPU65xxxxx (All Versions), Modicon Quantum Communication Modules: 140NOE771x1, 140NOC78x00, 140NOC77101 (All Versions), Modicon Premium Communication Modules: TSXETY4103, TSXETY5103 (All Versions)

CVSS Vector Breakdown

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

Weaknesses

CWE-787

Affected Products

modicon m340 bmxp342020 firmwareschneider-electricICS / OT / IoT
bmxnoe0100 firmwareschneider-electricICS / OT / IoT
bmxnoe0110 firmwareschneider-electricICS / OT / IoT
bmxnoc0401 firmwareschneider-electricICS / OT / IoT
bmxnor0200h rtu firmwareschneider-electricICS / OT / IoT
schneider-electriccommercialFRICS / OT / IoTaka schneider electric se
and 23 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

2 techniques
Initial Access
Privilege Escalation
View detailed technique mapping

References

https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2021-257-02
download.schneider-electric.com
https://nvd.nist.gov/vuln/detail/CVE-2021-22788
nvd.nist.gov

Timeline

Published
Feb 11, 2022
Last Updated
May 29, 2026

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