Cyber Resilience

CVE-2022-44456

RCE in Contec Conprosys Hmi System ≤ 3.4.4

High EPSSRCECommand Injection
Published
19 December 2022
Modified
17 April 2025
Patch / advisory
View advisory
CVSS Score v3.1 9.8
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.70 99.3th percentile
Risk Priority 96 floored blend · peak EPSS

CVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.

Summary

CVE-2022-44456 is a critical-severity OS Command Injection (CWE-78) vulnerability in Contec Conprosys Hmi System. Its CVSS base score is 9.8 (Critical).

Operationally, exploitation aligns with the MITRE ATT&CK technique Command and Scripting Interpreter (T1059); ranked in the top 0.7% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

Deeper analysis AI-assisted summary

Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.

CVE-2022-44456 is an OS command injection vulnerability (CWE-78) affecting CONPROSYS HMI System (CHS) version 3.4.4 and earlier. The flaw resides in the handling of specially crafted requests sent to the server component, enabling unauthenticated remote command execution with a CVSS v3.1 base score of 9.8 reflecting network attack vector, low complexity, and no required privileges or user interaction.

An attacker positioned on the network can submit malicious requests to the affected HMI system and obtain arbitrary operating-system command execution on the underlying server. Successful exploitation grants full control over confidentiality, integrity, and availability of the host, consistent with the high impact metrics in the CVSS vector.

Vendor advisories published by CONTEC and coordinated through JVN recommend applying the security updates referenced in the linked PDFs and product pages; the advisories address the command-injection issue in CHS releases after 3.4.4.

EPSS for this CVE rose from a low baseline to a peak of 0.4139 before settling at the current value of 0.2519, indicating that exploitation interest increased after public disclosure and that the vulnerability merits renewed attention.

OWASP Top 10 for Web (2025)

A05:2025 Injection

EU & UK References

Vulnerability Data

CONPROSYS HMI System (CHS) Ver.3.4.4?and earlier allows a remote unauthenticated attacker to execute an arbitrary OS command on the server where the product is running by sending a specially crafted request.

CWE(s)
CWE-78

Related Threats

MITRE ATT&CK Enterprise Techniques

T1059 Command and Scripting Interpreter Execution
Adversaries may abuse command and script interpreters to execute commands, scripts, or binaries.
attack.mitre.org →
T1059.003 Windows Command Shell Execution
Adversaries may abuse the Windows command shell for execution.
attack.mitre.org →
T1059.004 Unix Shell Execution
Adversaries may abuse Unix shell commands and scripts for execution.
attack.mitre.org →
T1059.001 PowerShell Execution
Adversaries may abuse PowerShell commands and scripts for execution.
attack.mitre.org →
T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2023-29154Same product: Contec Conprosys Hmi System
CVE-2023-28824Same product: Contec Conprosys Hmi System
CVE-2023-22324Same product: Contec Conprosys Hmi System
CVE-2023-28651Same product: Contec Conprosys Hmi System
CVE-2023-28657Same product: Contec Conprosys Hmi System
CVE-2025-34080Same product: Contec Conprosys Hmi System
CVE-2023-22373Same product: Contec Conprosys Hmi System
CVE-2023-22334Same product: Contec Conprosys Hmi System
CVE-2023-22339Same product: Contec Conprosys Hmi System
CVE-2022-29303Same vendor: Contec

Affected Assets

contec
conprosys hmi system
≤ 3.4.4

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

—

Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)

—

Validate
Prove the fix (OWASP ASVS)
  • V1.2.5
  • V1.2.8
  • V15.2.5

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SC-27 Platform-independent Applications
addresses: CWE-78

Platform-independent apps typically execute inside a managed runtime or sandbox that restricts direct OS command execution, reducing the ability to exploit OS command injection.

SI-10 Information Input Validation
addresses: CWE-78

Validates inputs to block special elements that would alter OS command execution.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 mostly match
prevents

PR.PS-06's SDLC practices directly require secure coding and input handling that blocks command-injection defects, yet the single broad outcome leaves many specific neutralization vectors and verification gaps unaddressed.

PR.PS-02 partial match
prevents

Routine patching/maintenance can remediate known command-injection CVEs in dependencies (partial forward) but does nothing to stop developers from introducing improper neutralization in custom code (none reverse).

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.29 Security testing in development and acceptance mostly match
finds

Security testing and code review target insecure use of operating-system command interfaces, catching command-injection flaws introduced during development.

References