A CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal' Vulnerability Type) vulnerability exists in the Web…

published 2020-12-11 5 y ago modified 2026-06-17 4 mo ago also EUVD-2020-28660

cvss: 7.5; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.5%; EPSS 1.5% chance of exploitation in 30 days, percentile 74%
public exploits: 0; none known

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.

Patch / fix

fixed in 11

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
schneider-electric bmxnoe0110_firmware 6.6
schneider-electric 140noe77101_firmware 7.3
schneider-electric 140noe77111_firmware 7.3

Exploit prediction

1.49% chance of exploitation in the next 30 days, higher than 74% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
NVD	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD	2.0	5.0	AV:N/AC:L/Au:N/C:P/I:N/A:N

Affected products

n/a Web Server on Modicon M340, Legacy Offers Modicon Quantum and Modicon Premium and associated Communication Modules (see security notification for affected versions)

Classification

Weakness

CWE-22 Improper Limitation of a Pathname to a Restricted Directory

References

se.com /ww/en/download/document/SEVD-2020-343-05/
vendor-advisory

Sources

CVE List CVE-2020-7535
NVD CVE-2020-7535

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary