Horizon Alert
Summary of the vulnerability and why it matters
Certain versions of Microsoft Visio and Visio Viewer contain a flaw in how they handle library loading. This weakness allows local users to execute a crafted application that can gain elevated privileges. The primary impact could be unauthorized access and control over affected systems.
- Visio and Visio Viewer
- Improper library loading
- Unauthorized system access
Attack Path
How an attacker could exploit the issue
This vulnerability allows local users to gain privileges by exploiting how Microsoft Visio and Visio Viewer handle library loading. An attacker can leverage a specially crafted application to achieve this. The process involves an attacker tricking a user into running a malicious application that loads a vulnerable library. This can result in unauthorized access and control over the affected system.
- Local execution on a Visio system
- Attacker crafts malicious application
- Triggering library load grants control
Live Threat
Current exploitation, exposure, and threat context
This vulnerability could allow local users to gain elevated privileges by tricking an organization's employees into opening a specially crafted application. If exploited, it could lead to unauthorized access and modification of sensitive data, impacting business operations and data integrity. Given its inclusion in the Known Exploited Vulnerabilities catalog, organizations should treat this as a significant risk.
- Attackers with moderate skill.
- Requires user interaction and local access.
- High business risk, treat as urgent.
Priority actions
Operational Fix
Recommended remediation, mitigation, and detection steps
This vulnerability impacts Microsoft Visio and Visio Viewer products. Attackers can exploit this by tricking a user into opening a specially crafted file, potentially leading to unauthorized code execution. This presents a risk to the confidentiality, integrity, and availability of affected systems and data.
- Identify affected Visio assets.
- Restrict file access and user privileges.
- Apply vendor updates and validate.
- Monitor for related activity.
