Velneo vClient Improper authentication
Priority LOW 28CWE-287Published · Updated
Key facts
- Attack vector
- Adjacent network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Security bypass, Spoofing
- Confidentiality · integrity · availability
- High · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-287 and CWE-295.
Summary
Velneo vClient on its 28.1.3 version, does not correctly check the certificate of authenticity by default. This could allow an attacker that has access to the network to perform a MITM attack in order to obtain the user´s credentials.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00464 40th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-45035
- 2026-10-03 Alias added: GHSA-pv7f-h3w8-w3jh
References
Advisory 4
- https://www.incibe-cert.es/en/early-warning/security-advisories/velneo-vclient-improper-authentication
- https://velneo.es/publicacion-de-incidencia-de-seguridad-en-cve-cve-2021-45035/
- https://www.velneo.com/blog/nueva-revision-velneo-29-2
- https://doc.velneo.com/v/29/velneo/notas-de-la-version#verificacion-de-certificados
More Velneo Vclient vulnerabilities
- TI-2021-20386 Velneo vClient improper authentication CVSS 3.1HIGH 8.7
Sources
- CVE-2021-45035 · CVE Program
- CVE-2021-45035 · NVD
- FIRST EPSS
- GHSA-pv7f-h3w8-w3jh · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences