CVE-2021-22789
A CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability...
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).
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
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).
- Record
CVE-2021-22789- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - CVSS 2.0
- 4.0 Medium
AV:N/AC:L/Au:S/C:N/I:N/A:P - Weakness
- CWE-119
- Updated
- 2026-11-02
CVE List
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).
- Record
CVE-2021-22789- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-119
- Updated
- 2026-11-02
EUVDEUVD-2021-9924
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).
- Record
EUVD-2021-9924- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-gr6x-gf4c-24g4
A CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability...
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).
- Record
GHSA-gr6x-gf4c-24g4- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-119
- Updated
- 2026-11-02
Affected products
- schneider-electric modicon m340 bmxp341000
- schneider-electric modicon m340 bmxp342010
- schneider-electric modicon m340 bmxp342020
- schneider-electric modicon m340 bmxp342030
- schneider-electric modicon m580 bmeh582040
- schneider-electric modicon m580 bmeh582040c
- schneider-electric modicon m580 bmeh582040s
- schneider-electric modicon m580 bmeh584040
- schneider-electric modicon m580 bmeh584040c
- schneider-electric modicon m580 bmeh584040s
- schneider-electric modicon m580 bmeh586040
- schneider-electric modicon m580 bmeh586040c
Show 37 moreShow less
- schneider-electric modicon m580 bmeh586040s
- schneider-electric modicon m580 bmep581020
- schneider-electric modicon m580 bmep581020h
- schneider-electric modicon m580 bmep582020
- schneider-electric modicon m580 bmep582020h
- schneider-electric modicon m580 bmep582040
- schneider-electric modicon m580 bmep582040h
- schneider-electric modicon m580 bmep582040s
- schneider-electric modicon m580 bmep583020
- schneider-electric modicon m580 bmep583040
- schneider-electric modicon m580 bmep584020
- schneider-electric modicon m580 bmep584040
- schneider-electric modicon m580 bmep584040s
- schneider-electric modicon m580 bmep585040
- schneider-electric modicon m580 bmep585040c
- schneider-electric modicon m580 bmep586040
- schneider-electric modicon m580 bmep586040c
- schneider-electric modicon mc80 bmkc8020301
- schneider-electric modicon mc80 bmkc8020310
- schneider-electric modicon mc80 bmkc8030311
- schneider-electric modicon momentum 171cbu78090
- schneider-electric modicon momentum 171cbu98090
- schneider-electric modicon momentum 171cbu98091
- schneider-electric modicon premium tsxp57 1634m
- schneider-electric modicon premium tsxp57 2634m
- schneider-electric modicon premium tsxp57 2834m
- schneider-electric modicon premium tsxp57 454m
- schneider-electric modicon premium tsxp57 4634m
- schneider-electric modicon premium tsxp57 554m
- schneider-electric modicon premium tsxp57 5634m
- schneider-electric modicon premium tsxp57 6634m
- schneider-electric modicon quantum 140cpu65150
- schneider-electric modicon quantum 140cpu65150c
- schneider-electric modicon quantum 140cpu65160
- schneider-electric modicon quantum 140cpu65160c
- schneider-electric plc simulator for ecostruxure control expert
- schneider-electric plc simulator for ecostruxure process expert
History
| Recorded | Changed | Sources |
|---|---|---|
| facts | ||
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-22789 is a medium vulnerability (CVSS 6.5) in Schneider-electric Modicon M340 Bmxp341000, published September 2, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.85%, the 58th percentile. No source names a fixed version.