CVE-2021-45036
Velneo vClient improper authentication
Velneo vClient on its 28.1.3 version, could allow an attacker with knowledge of the victims's username and hashed password to spoof the victim's id against the server.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Velneo vClient improper authentication
Velneo vClient on its 28.1.3 version, could allow an attacker with knowledge of the victims's username and hashed password to spoof the victim's id against the server.
- Record
CVE-2021-45036- CVSS 3.1
- 8.7 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N - Weakness
- CWE-290
- Updated
- 2026-11-02
EUVDEUVD-2021-31833
Velneo vClient on its 28.1.3 version, could allow an attacker with knowledge of the victims's username and hashed password to spoof the victim's id against the server.
- Record
EUVD-2021-31833- CVSS 3.1
- 8.7 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-c83p-m9mw-q96q
Velneo vClient on its 28.1.3 version, could allow an attacker with knowledge of the victims's...
Velneo vClient on its 28.1.3 version, could allow an attacker with knowledge of the victims's username and hashed password to spoof the victim's id against the server.
- Record
GHSA-c83p-m9mw-q96q- CVSS 3.1
- 7.4 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N - Weakness
- CWE-287, CWE-290, CWE-836
- Updated
- 2026-11-02
NVD
Velneo vClient on its 28.1.3 version, could allow an attacker with knowledge of the victims's username and hashed password to spoof the victim's id against the server.
- Record
CVE-2021-45036- CVSS 3.1
- 8.7 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N - CVSS 3.1
- 7.4 High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N - Weakness
- CWE-290, CWE-287
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-45036 is a high vulnerability (CVSS 8.7) in Velneo Vclient, published November 28, 2022. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.78%, the 56th percentile. No source names a fixed version.
References
incibe.es/en/incibe-cert/notices/aviso/velneo-vclient-improper-authentication-0
velneo.com/blog/disponible-la-nueva-version-velneo-32
doc.velneo.com/v/32/velneo/notas-de-la-version
velneo.es/mivelneo/listado-de-cambios-velneo-32
nvd.nist.gov/vuln/detail/CVE-2021-45036
incibe-cert.es/en/early-warning/security-advisories/velneo-vclient-improper-authentication-0
github.com/advisories/GHSA-c83p-m9mw-q96q