CVE-2026-3315 Overview
CVE-2026-3315 is an Incorrect Default Permissions vulnerability affecting ASSA ABLOY Visionline software on Windows systems. The vulnerability combines multiple security weaknesses including execution with unnecessary privileges and incorrect permission assignment for critical resources. This allows local attackers with low privileges to manipulate system configuration and environment settings, potentially compromising the security of hospitality access control systems.
Critical Impact
Local attackers can exploit misconfigured permissions to manipulate configuration settings on Visionline access control systems, potentially compromising hotel door lock management infrastructure.
Affected Products
- ASSA ABLOY Visionline versions 1.0 through 1.32 on Windows
- Hospitality access control systems running vulnerable Visionline versions
- VingCard electronic lock management systems using affected software
Discovery Timeline
- 2026-03-10 - CVE CVE-2026-3315 published to NVD
- 2026-03-11 - Last updated in NVD database
Technical Details for CVE-2026-3315
Vulnerability Analysis
This vulnerability stems from a combination of three related weaknesses: incorrect default permissions (CWE-276), execution with unnecessary privileges (CWE-250), and incorrect permission assignment for critical resources (CWE-732). When Visionline is installed on Windows systems, certain critical files, directories, or registry keys are configured with overly permissive access controls.
The local attack vector means an attacker must have existing access to the system, though only low-level privileges are required to exploit the vulnerability. The attack requires precise conditions to be met, but once exploited, the attacker can achieve high impact on system integrity through configuration manipulation.
Root Cause
The root cause lies in how Visionline configures file system permissions and executes processes with elevated privileges unnecessarily. The software fails to properly restrict access to configuration files and critical resources during installation or runtime, allowing users with limited privileges to modify settings that should be protected. This violates the principle of least privilege, where processes and users should only have the minimum permissions necessary to perform their functions.
Attack Vector
The attack requires local access to a Windows system running a vulnerable version of Visionline. An attacker with low-level user privileges can exploit the incorrect permissions to:
- Access configuration files that control the Visionline access management system
- Modify environment variables or system settings used by the software
- Potentially manipulate how the software interacts with physical access control hardware
The vulnerability allows configuration and environment manipulation, which in a hospitality context could affect door lock management, access credentials, or audit logging functionality. While the attack complexity requires precise conditions, successful exploitation could compromise the security posture of the entire access control deployment.
Detection Methods for CVE-2026-3315
Indicators of Compromise
- Unexpected modifications to Visionline configuration files or registry entries
- Audit logs showing configuration changes by non-administrative users
- Unusual process execution patterns associated with Visionline services
- Modified file permissions on Visionline installation directories
Detection Strategies
- Monitor Windows Security Event Logs for permission changes on Visionline installation directories
- Implement file integrity monitoring (FIM) on critical Visionline configuration files
- Review Windows audit logs for unauthorized access to Visionline resources
- Deploy endpoint detection rules to alert on suspicious process behavior related to Visionline services
Monitoring Recommendations
- Enable detailed auditing on Visionline installation directories and configuration files
- Configure alerts for any configuration file modifications outside of scheduled maintenance windows
- Regularly review access permissions on critical Visionline resources
- Monitor for privilege escalation attempts on systems hosting Visionline software
How to Mitigate CVE-2026-3315
Immediate Actions Required
- Upgrade ASSA ABLOY Visionline to version 1.33 or later
- Review and restrict file system permissions on Visionline installation directories
- Audit current access controls on all systems running affected versions
- Implement principle of least privilege for accounts accessing Visionline systems
Patch Information
ASSA ABLOY has addressed this vulnerability in Visionline version 1.33. Organizations should consult the VingCard Security Advisory for detailed upgrade instructions and additional security guidance. The fix corrects the default permission configuration and ensures critical resources are properly protected from unauthorized access.
Workarounds
- Manually review and tighten NTFS permissions on the Visionline installation directory
- Remove write access for standard users to configuration files and directories
- Implement application whitelisting to prevent unauthorized modification of Visionline executables
- Segment Visionline systems on a restricted network with limited user access
- Enable Windows Controlled Folder Access to protect critical Visionline directories
# Example: Review current permissions on Visionline directory
icacls "C:\Program Files\ASSA ABLOY\Visionline" /T
# Example: Remove write permissions for standard Users group
icacls "C:\Program Files\ASSA ABLOY\Visionline" /remove:g Users /T
icacls "C:\Program Files\ASSA ABLOY\Visionline" /grant:r Users:(OI)(CI)(RX) /T
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
