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CVE-2021-45035

21
FAUCET Score

CVE-2021-45035 affects Velneo vClient version 28.1.3, stemming from its default failure to properly validate authenticity certificates. This medium-severity vulnerability (CVSS 5.9) allows a network-adjacent attacker to perform a Man-in-the-Middle (MITM) attack, potentially compromising user credentials due to high confidentiality impact. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage, indicating low current attention.

Impacted Technologies

VendorProductVersion(s)CPE
28.1.3CPE matchmatch criteria
cpe:2.3:a:velneo:vclient:28.1.3:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.3MEDIUM

CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N

Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.1
Impact Score
4.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.38%
Probability of exploitation in next 30 days
EPSS Percentile
30.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0038 is in the 4th percentile among its peer group of 19,956 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

doc.velneo.com / v/29/velneo/notas-de-la-version
Vendor Advisory
velneo.es / publicacion-de-incidencia-de-seguridad-en-cve-cve-2021-45035
Vendor Advisory
incibe-cert.es / en/early-warning/security-advisories/velneo-vclient-improper-authentication
Third Party Advisory
velneo.com / blog/nueva-revision-velneo-29-2
Vendor Advisory