CVE-2026-14868 Overview
CVE-2026-14868 affects the PcVue SCADA platform developed by Arcinfo. The vulnerability stems from a weak encryption algorithm used to protect user account configuration data stored in the built-in user directory of PcVue projects. A local attacker with low privileges can tamper with the protected configuration and elevate their access within the PcVue application. All versions of PcVue prior to 17.0.0 are affected. The weakness is classified under CWE-326: Inadequate Encryption Strength.
Critical Impact
A local attacker can break the encryption protecting the PcVue user directory, modify stored account configuration, and obtain privileged access to the SCADA application.
Affected Products
- Arcinfo PcVue, all versions prior to 17.0.0
- PcVue projects using the built-in user directory
- SCADA deployments relying on PcVue local authentication
Discovery Timeline
- 2026-07-07 - CVE-2026-14868 published to NVD
- 2026-07-09 - Last updated in NVD database
Technical Details for CVE-2026-14868
Vulnerability Analysis
PcVue is a Supervisory Control and Data Acquisition (SCADA) platform used in industrial and building automation environments. The product ships with a built-in user directory that stores account configuration, including credentials and permission mappings, on the local project. This directory relies on cryptographic protection to prevent tampering by users who have access to the underlying host or project files.
The encryption algorithm used by PcVue versions prior to 17.0.0 does not provide sufficient strength for the sensitivity of the protected data. An attacker with local access to the project files can recover or overwrite the protected configuration. Once the configuration is altered, the attacker can assign elevated roles or replace credential material, ultimately gaining privileged access to the PcVue application and the industrial processes it controls.
Root Cause
The root cause is the selection of a cryptographic algorithm that does not meet current standards for confidentiality and integrity of stored authentication data [CWE-326]. Weak algorithms or insufficient key sizes allow offline recovery or manipulation of ciphertext, defeating the intended protection of the user directory.
Attack Vector
Exploitation requires local access to the PcVue project files with low privileges. The attacker does not need user interaction. Because authentication is not treated as sufficient to prevent the tampering, an authorized low-privilege user can leverage the flaw to promote themselves to an administrative role. The vulnerability affects confidentiality and integrity of the PcVue application but does not directly impact availability.
No public proof-of-concept code is available for this issue. See the PCVue Security Bulletin SB2026-5 for vendor-provided technical details.
Detection Methods for CVE-2026-14868
Indicators of Compromise
- Unexpected modifications to PcVue project files that store the built-in user directory
- New or modified user accounts in the PcVue application that were not created through normal administrative workflows
- Privilege changes on existing PcVue accounts with no corresponding change-management record
- File access events on PcVue project directories from accounts that do not typically administer the SCADA platform
Detection Strategies
- Monitor file integrity on PcVue project directories and alert on writes to user directory artifacts
- Correlate PcVue application audit logs with operating system authentication events to detect out-of-band configuration changes
- Review PcVue role assignments on a scheduled basis and compare against an approved baseline
Monitoring Recommendations
- Forward PcVue audit logs and Windows Security event logs to a centralized SIEM for correlation
- Alert on local logons to PcVue engineering workstations by non-administrative accounts followed by project file writes
- Track process execution against PcVue binaries and configuration utilities on engineering hosts
How to Mitigate CVE-2026-14868
Immediate Actions Required
- Upgrade PcVue to version 17.0.0 or later, which addresses the weak encryption algorithm
- Restrict local access to PcVue engineering workstations and project file locations to authorized personnel only
- Audit the PcVue built-in user directory for unauthorized accounts or role changes and revert any unexpected entries
- Rotate credentials for all PcVue accounts stored in the built-in directory after upgrading
Patch Information
Arcinfo has released a fixed version of PcVue that resolves CVE-2026-14868. Administrators should apply the update documented in the PCVue Security Bulletin SB2026-5. Version 17.0.0 and later use a stronger cryptographic algorithm for protecting the user directory.
Workarounds
- Apply host-based access controls to restrict which OS accounts can read or write PcVue project files
- Where feasible, migrate authentication to an external directory service instead of the built-in PcVue user directory
- Enable full disk encryption and endpoint hardening on engineering workstations that host PcVue projects
- Segment PcVue engineering workstations from general-purpose IT networks to reduce local attacker exposure
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
