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© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2023-28657

25
FAUCET Score

CVE-2023-28657 is an improper access control vulnerability in CONPROSYS HMI System (CHS) versions prior to 3.5.3, allowing a local user to gain administrative privileges on the affected PC. This vulnerability carries a high CVSS score of 8.8, indicating a critical risk where an attacker with low privileges can achieve high impact on confidentiality, integrity, and availability. There is currently no public exploit code available, no evidence of active exploitation, and minimal community discussion or media coverage surrounding this CVE.

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

8.8HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.71%
Probability of exploitation in next 30 days
EPSS Percentile
49.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0071 is in the 42nd percentile among its peer group of 17,823 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 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 0.1 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