Medium severity · published Sep 2, 2021
CVE-2021-22791
A CWE-787: Out-of-bounds Write vulnerability that could cause a Denial of Service on the Modicon PLC controller / simulator when updating the controller application with a…
6.5
CVSS
0.9%
EPSS
No
On KEV
Description
A CWE-787: Out-of-bounds Write 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
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.9% · higher than 58% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MM
Modicon M340 Bmxp341000 · Schneider-electric
All versions, or not specified · source: NVD
MM
Modicon M340 Bmxp342010 · Schneider-electric
All versions, or not specified · source: NVD
MM
Modicon M340 Bmxp342020 · Schneider-electric
All versions, or not specified · source: NVD
MM
Modicon M340 Bmxp342030 · Schneider-electric
All versions, or not specified · source: NVD
MM
Modicon M580 Bmeh582040 · Schneider-electric
All versions, or not specified · source: NVD
MM
Modicon M580 Bmeh582040c · Schneider-electric
All versions, or not specified · source: NVD
MM
Modicon M580 Bmeh582040s · Schneider-electric
All versions, or not specified · source: NVD
MM
Modicon M580 Bmeh584040 · Schneider-electric
All versions, or not specified · source: NVD
MM
Modicon M580 Bmeh584040c · Schneider-electric
All versions, or not specified · source: NVD
MM
Modicon M580 Bmeh584040s · Schneider-electric
All versions, or not specified · source: NVD
MM
Modicon M580 Bmeh586040 · Schneider-electric
All versions, or not specified · source: NVD
MM
Modicon M580 Bmeh586040c · Schneider-electric
All versions, or not specified · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-22791
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-22791
Not Applicable
https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2021-222-06
Patch
https://download.schneider-electric.com/files?p_Doc_Ref=SEVD-2021-222-04
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