CGM CLININET: Use of Client-Side Authentication
CVE-2025-30042 is a high-severity use of client-side authentication vulnerability in CGM CLININET from CGM, with a CVSS 3.1 base score of 7.8 out of 10. It can be exploited with local access to the system by an attacker with a low-privileged account, without any action from a user. The record lists version 2025.MS2 as the first without the flaw, so updating CGM CLININET to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.1% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update CGM CLININET to 2025.MS2 or a later version.
- Update Clininet to 2025.ms2 or a later version.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| CGM | CGM CLININET | before 2025.MS2 | 2025.MS2 |
| Cgm | Clininet | before 2025.ms2 | 2025.ms2 |
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
- LocalThe attacker needs local access or must trick a user into running something.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- LowA basic user account is enough.
- 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:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 4.0 | 9.0 | Critical | CNA (cert.pl) |
| CVSS 3.1 | 7.8 | High | NVD |
Official description
The CGM CLININET system provides smart card authentication; however, authentication is conducted locally on the client device, and, in reality, only the certificate number is used for access verification. As a result, possession of the certificate number alone is sufficient for authentication, regardless of the actual presence of the smart card or ownership of the private key.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Use of Client-Side Authentication
A client/server product performs authentication within client code but not in server code, allowing server-side authentication to be bypassed via a modified client that omits the authentication check.
How developers prevent this class of flaw
- Do not rely on client side data. Always perform server side authentication.
More Use of Client-Side Authentication vulnerabilities (CWE-603)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Third-party and government advisories
- cert.pl/en/posts/2026/03/CVE-2025-10350/Third Party Advisory
Other references
Other vulnerabilities in CGM CLININET
- 9.3 Critical severity
- 8.8 High severity
- 9.4 Critical severity
- 9.4 Critical severity
- 9.0 Critical severity
- 8.6 High severity
Recent Use of Client-Side Authentication vulnerabilities
- 9.8 Critical severity
- 8.8 High severity
- 9.8 Critical severity
- 9.9 Critical severity
- 7.5 High severity
- 7.5 High severity
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