Home/CVE/A CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability that could cause a Deni
CVE

CVE-2021-22789

A CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability that could cause a Deni

A CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer 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).

MEDIUM · CVSS 6.5 EPSS 0.00437
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

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

Affected Products & Versions

49
schneider-electric modicon m340 bmxp341000all versions
schneider-electric modicon m340 bmxp342010all versions
schneider-electric modicon m340 bmxp342020all versions
schneider-electric modicon m340 bmxp342030all versions
schneider-electric modicon m580 bmeh582040all versions
schneider-electric modicon m580 bmeh582040call versions
schneider-electric modicon m580 bmeh582040sall versions
schneider-electric modicon m580 bmeh584040all versions
▣

Scoring & Timeline

6.5
MEDIUM · CVSS v3.1 · cybersecurity@se.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD02 Sep 2021 · 05:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
🔗

References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2021-222-04PatchVendor Advisory
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