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© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2023-28399

23
FAUCET Score

CVE-2023-28399 is a critical vulnerability affecting CONPROSYS HMI System (CHS) versions prior to 3.5.3, stemming from incorrect permission assignments to the product's installation folder. This allows a local user with basic privileges to potentially destroy the system or execute arbitrary malicious code. Rated with a CVSS score of 7.8 (High), this vulnerability has a local attack vector with low complexity, requiring no user interaction, and can lead to high impacts on confidentiality, integrity, and availability. The EPSS score is very low, indicating a minimal probability of exploitation in the wild. Currently, there is no evidence of active exploitation, nor is public exploit code available in Metasploit, Nuclei, or ExploitDB. Community discussion and media coverage for this CVE are also minimal, suggesting low public awareness and attention.

Impacted Technologies

VendorProductVersion(s)CPE
< 3.5.3CPE matchmatch criteria
cpe:2.3:a:contec:conprosys_hmi_system:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.8HIGH

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.18%
Probability of exploitation in next 30 days
EPSS Percentile
8.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0018 is in the 31st percentile among its peer group of 17,070 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

jvn.jp / en/vu/JVNVU93372935
Third Party Advisory
contec.com / api/downloadlogger
Vendor Advisory
contec.com / jp/api/downloadlogger
Vendor Advisory