Contec CONPROSYS HMI System (CHS) v3.5.2 Denial of Service
Priority LOW 26CWE-799Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · Low
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
A denial of service vulnerability exists in Contec CONPROSYS HMI System versions 3.5.2 and prior. When there is a time-zone mismatch in certain configuration files, a remote, unauthenticated attacker may deny logins for an extended period of time.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0104 64th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
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
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Contec Co., Ltd. | CONPROSYS HMI System | up to 3.5.2 | — | No fix listed | CNA |
- CONPROSYS HMI System VendorContec Co., Ltd. Affected up to 3.5.2 Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:contec:conprosys_hmi_system:*:*:*:*:*:*:*:* | before 3.5.3 | Vulnerable | Contec Co., Ltd. |
- cpe:2.3:a:contec:conprosys_hmi_system:*:*:*:*:*:*:*:* Versions before 3.5.3 Vulnerable ·Contec Co., Ltd.
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2023-2758
- 2026-10-03 Alias added: GHSA-grw6-p9qm-qmx4
References
More Contec Co., Ltd. Conprosys Hmi System vulnerabilities
- TI-2022-21852 OS command injection in Contec Co., Ltd. CONPROSYS HMI System CVSS 3.1CRITICAL 9.8
- TI-2023-13585 SQL injection in Contec Co., Ltd. CONPROSYS HMI System CVSS 3.1HIGH 7.2
- TI-2023-13169 Cross-site scripting in Contec Co., Ltd. CONPROSYS HMI System CVSS 3.1MEDIUM 4.8
- TI-2023-13175 Missing authorization in Contec Co., Ltd. CONPROSYS HMI System CVSS 3.1HIGH 8.8
- TI-2023-08595 Improper privilege management in Contec Co., Ltd. CONPROSYS HMI System CVSS 3.1HIGH 7.5
- TI-2023-13230 Cleartext storage of sensitive information in Contec Co., Ltd. CONPROSYS HMI System CVSS 3.1HIGH 8.1
Sources
- CVE-2023-2758 · CVE Program
- CVE-2023-2758 · NVD
- FIRST EPSS
- GHSA-grw6-p9qm-qmx4 · 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