What is the CVSS score of CVE-2022-37301?

CVE-2022-37301 has a CVSS 3.1 base score of 7.5 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. EPSS exploitation probability: 0.7%.

Modicon M340 Bmx P34 2010 Firmware CVE-2022-37301

HIGH

Integer Underflow (CWE-191)

2022-11-22 cybersecurity@se.com

7.5

CVSS 3.1 · NVD

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Vulnerability Assessment

Weakness	CWE CWE-191 ASVS 5.0 V15 - Secure Coding and Architecture Integer underflow checks
Impact	CVSS score of 7.5 (HIGH). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required.
Exploit ScenarioDerived	This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the high-severity affected system.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).

No patch listed yet 0.7% exploitation probability (EPSS)

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AnalysisAI

A CWE-191: Integer Underflow (Wrap or Wraparound) vulnerability exists that could cause a denial of service of the controller due to memory access violations when using the Modbus TCP protocol. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

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Technical ContextAI · show details

This vulnerability is classified under CWE-191. A CWE-191: Integer Underflow (Wrap or Wraparound) vulnerability exists that could cause a denial of service of the controller due to memory access violations when using the Modbus TCP protocol. Affected products: Modicon M340 CPU (part numbers BMXP34*)(V3.40 and prior), Modicon M580 CPU (part numbers BMEP* and BMEH*)(V3.22 and prior), Legacy Modicon Quantum/Premium(All Versions), Modicon Momentum MDI (171CBU*)(All Versions), Modicon MC80 (BMKC80)(V1.7 and prior) Affected products include: Schneider-Electric Modicon M340 Bmx P34-2010 Firmware, Schneider-Electric Modicon M340 Bmx P34-2030 Firmware, Schneider-Electric Modicon M580 Bmeh582040 Firmware, Schneider-Electric Modicon M580 Bmeh582040C Firmware, Schneider-Electric Modicon M580 Bmeh582040S Firmware.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 7.5 HIGH

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

DescriptionNVD

A CWE-191: Integer Underflow (Wrap or Wraparound) vulnerability exists that could cause a denial of service of the controller due to memory access violations when using the Modbus TCP protocol. Affected products: Modicon M340 CPU (part numbers BMXP34*)(V3.40 and prior), Modicon M580 CPU (part numbers BMEP* and BMEH*)(V3.22 and prior), Legacy Modicon Quantum/Premium(All Versions), Modicon Momentum MDI (171CBU*)(All Versions), Modicon MC80 (BMKC80)(V1.7 and prior)

Threat Intelligence Overview

EPSS Score

0.7%

Top 51% exploitable

Data Quality

2 sources

Confidence: Low

NVD

CVE.org

EPSS

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity HIGH

CISA KEV No

Public POC No

EPSS 0.7%

Patch available No

Active threat No

Deciding rule

HIGH severity (CVSS 7.0-8.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Scheduled

Exploitation· derived

None

System Exposure· derived

Open

Automatable· derived

Yes

Human Impact· derived

Medium

Priority Score

Low Medium High Critical

KEV: 0

EPSS: +1

CVSS: +38

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Integer Overflow MEDIUM

Integer overflow occurs when an arithmetic operation produces a result that exceeds the maximum value a given integer type can store.

Denial of Service MEDIUM

Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.

Affected Products (CPE)NVD

cpe:2.3:o:schneider-electric:modicon_m340_bmx_p34-2010_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:schneider-electric:modicon_m340_bmx_p34-2030_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:schneider-electric:modicon_m580_bmeh582040_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:schneider-electric:modicon_m580_bmeh582040c_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:schneider-electric:modicon_m580_bmeh582040s_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:schneider-electric:modicon_m580_bmeh584040_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:schneider-electric:modicon_m580_bmeh584040c_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:schneider-electric:modicon_m580_bmeh584040s_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:schneider-electric:modicon_m580_bmeh586040_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:schneider-electric:modicon_m580_bmeh586040c_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:schneider-electric:modicon_m580_bmeh586040s_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:schneider-electric:modicon_m580_bmep581020_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:schneider-electric:modicon_m580_bmep581020h_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:schneider-electric:modicon_m580_bmep582020_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:schneider-electric:modicon_m580_bmep582020h_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:schneider-electric:modicon_m580_bmep582040_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:schneider-electric:modicon_m580_bmep582040h_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:schneider-electric:modicon_m580_bmep582040s_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:schneider-electric:modicon_m580_bmep583020_firmware:*:*:*:*:*:*:*:*

cpe:2.3:o:schneider-electric:modicon_m580_bmep583040_firmware:*:*:*:*:*:*:*:*

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References

Advisories & patches

ADVISORY https://www.se.com/us/en/download/document/SEVD-2022-221-02/

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GitHub PoC

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