modulo 6 devices modu680-AS: Path Traversal: '.../...//'
CVE-2025-41723 is a critical-severity path traversal: '.../...//' vulnerability in modulo 6 devices modu680-AS from Sauter, with a CVSS 3.1 base score of 9.8 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. The record lists version Firmware v3.2.0 as the first without the flaw, so updating modulo 6 devices modu680-AS to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 1.35% chance of exploitation within 30 days, higher than 72% of scored CVEs.
Critical severity: a successful attack would have severe impact.
What to do
- Update modulo 6 devices modu680-AS to Firmware v3.2.0 or a later version.
- Update modulo 6 devices modu660-AS to Firmware v3.2.0 or a later version.
- Update modulo 6 devices modu612-LC to Firmware v3.2.0 or a later version.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Sauter | modulo 6 devices modu680-AS | before Firmware v3.2.0 | Firmware v3.2.0 |
| Sauter | modulo 6 devices modu660-AS | before Firmware v3.2.0 | Firmware v3.2.0 |
| Sauter | modulo 6 devices modu612-LC | before Firmware v3.2.0 | Firmware v3.2.0 |
| Sauter | EY-modulo 5 modu 5 modu524 | before Firmware v6.0 | Firmware v6.0 |
| Sauter | EY-modulo 5 modu 5 modu525 | before Firmware v6.0 | Firmware v6.0 |
| Sauter | EY-modulo 5 ecos 5 ecos504/505 | before Firmware v6.0 | Firmware v6.0 |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- NoneNo account or login is needed.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. Scored by CNA (cert.vde.com).
Official description
The importFile SOAP method is vulnerable to a directory traversal attack. An unauthenticated remote attacker bypass the path restriction and upload files to arbitrary locations.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Path Traversal: '.../...//'
The product uses external input to construct a pathname that should be within a restricted directory, but it does not properly neutralize '.../...//' (doubled triple dot slash) sequences that can resolve to a location that is outside of that directory.
How developers prevent this class of flaw
- Inputs should be decoded and canonicalized to the application's current internal representation before being validated (CWE-180). Make sure that the application does not decode the same input twice (CWE-174). Such errors could be used to bypass allowlist validation schemes by introducing dangerous inputs after they have been checked.
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: yes, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Other vulnerabilities in modulo 6 devices modu680-AS
- 7.5 High severity
- 7.5 High severity
- 8.8 High severity
Recent Path Traversal: '.../...//' vulnerabilities
- 9.8 Critical severity
- 7.5 High severity
- 8.8 High severity
RARLAB WinRAR Path Traversal Exploited
- 7.3 High severity
- 7.5 High severity
- 8.1 High severity
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