# Integer underflow in Schneider Electric Modicon M340 CPU (part numbers BMXP34\*) and others

CVE record · `CVE-2022-37301`

- **Identifiers:** `CVE-2022-37301`
- **State:** Confirmed
- **Severity:** CVSS 7.5 High
- **Critical:** No
- **CNA:** schneider
- **Weakness (CWE):** [CWE-191](https://cwe.mitre.org/data/definitions/191.html)
- **Tags:** [Memory corruption](https://agentprime.io/advisories/tag/memory-corruption.md)
- **Technologies:** [Schneider Electric Modicon M340 CPU (part numbers BMXP34\*)](https://agentprime.io/advisories/technology/schneider-electric-modicon-m340-cpu-part-numbers-bmxp34.md) · [Schneider Electric Modicon M580 CPU (part numbers BMEP\* and BMEH\*)](https://agentprime.io/advisories/technology/schneider-electric-modicon-m580-cpu-part-numbers-bmep-and-bmeh.md) · [Schneider Electric Legacy Modicon Quantum/Premium](https://agentprime.io/advisories/technology/schneider-electric-legacy-modicon-quantum-premium.md) · [Schneider Electric Modicon Momentum MDI (171CBU\*)](https://agentprime.io/advisories/technology/schneider-electric-modicon-momentum-mdi-171cbu.md) · [Schneider Electric Modicon MC80 (BMKC80)](https://agentprime.io/advisories/technology/schneider-electric-modicon-mc80-bmkc80.md)
- **Published:** 22 Nov 2022
- **Updated:** 28 Apr 2025
- **Reviewed by a person:** No

Published by the CVE Program (CNA: schneider) at 22 Nov 2022, 00:00 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

## Affected products, as the CNA wrote them

- Vendor: Schneider Electric. Product: Modicon M340 CPU (part numbers BMXP34\*).
  - affected: `V to 3.40, inclusive` (custom)
- Vendor: Schneider Electric. Product: Modicon M580 CPU (part numbers BMEP\* and BMEH\*).
  - affected: `V to 3.22, inclusive` (custom)
- Vendor: Schneider Electric. Product: Legacy Modicon Quantum/Premium.
  - affected: `All Versions`
- Vendor: Schneider Electric. Product: Modicon Momentum MDI (171CBU\*).
  - affected: `All Versions`
- Vendor: Schneider Electric. Product: Modicon MC80 (BMKC80).
  - affected: `V to 1.7, inclusive` (custom)

## Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

## Severity and exploitation

- 7.5 High, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`, from CNA (schneider)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0077, the 55th percentile, on 6 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

This record came from the full history of the CVE Program, published 22 Nov 2022. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2022-37301](https://www.cve.org/CVERecord?id=CVE-2022-37301)
- [NVD: CVE-2022-37301](https://nvd.nist.gov/vuln/detail/CVE-2022-37301)

### References from the CNA

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

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.

## Check whether this affects you

This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it. Compare the affected versions above with what you run.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), `get_advisory` returns this record and `search_advisories` finds related ones. Setup: <https://agentprime.io/mcp.md>
- As JSON: <https://api.agentprime.io/v1/advisories/CVE-2022-37301>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2022-37301/>. Everything for agents: <https://agentprime.io/llms.txt>.