CVE-2020-7535

7.5 HIGH 1% exploit odds Fix listed

What it is

A CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal' Vulnerability Type) vulnerability exists in the Web Server on Modicon M340, Legacy Offers Modicon Quantum and Modicon Premium and associated Communication Modules (see security notification for affected versions), that could cause disclosure of information when sending a specially crafted request to the controller over HTTP.

At a glance

Exploitability: Can be exploited over the network without logging in. High risk of data exposure.
Exploit odds: 1.5% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2020-12-11 01:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-17 03:24 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 1.5% in the next 30 days (EPSS).
Severity: 7.5 HIGH (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2020-12-11 01:15 UTC
Last modified: 2026-06-17 03:24 UTC
Exploit probability: 1.5% · EPSS, next 30 days
Weakness: CWE-22 · Path traversal
Record status: Modified

Affected

schneider-electric Modicon m340 bmxp341000 Firmware < 3.30
schneider-electric Modicon m340 bmxp342000 Firmware < 3.30
schneider-electric Modicon m340 bmxp3420102 Firmware < 3.30
schneider-electric Modicon m340 bmxp3420102cl Firmware < 3.30
schneider-electric Modicon m340 bmxp342020 Firmware < 3.30
schneider-electric Modicon m340 bmxp3420302 Firmware < 3.30
schneider-electric Modicon m340 bmxp3420302cl Firmware < 3.30
schneider-electric bmxnoe0100 Firmware < 3.4

Attack profile CVSS 3.1 · 7.5

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: None
Availability: None

Raw vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Is it in your code?

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Read https://cve-list.com/agent/cve/CVE-2020-7535.md and follow it. Check whether this project is affected by CVE-2020-7535. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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Fix and advisories

References

NVD record · CVE.org record