Horizon Alert
Summary of the vulnerability and why it matters
This vulnerability impacts Trend Micro Apex One agents installed on Windows systems. A flaw in the agent's operation could allow an attacker who has already gained low-privileged access to a system to escalate their privileges. This could lead to unauthorized control over the affected endpoint.
- Vulnerable Trend Micro Apex One agent
- Time-of-check time-of-use flaw
- Local privilege escalation impact
Attack Path
How an attacker could exploit the issue
A time-of-check time-of-use vulnerability in the Apex One agent allows a local attacker to escalate privileges. The attacker must first gain the ability to execute low-privileged code on the target system. This could lead to unauthorized access and modification of system data.
- Local code execution required.
- Attacker escalates privileges.
- System control is gained.
Live Threat
Current exploitation, exposure, and threat context
This vulnerability could allow a local attacker to gain higher privileges on an affected system. Exploitation requires the attacker to first achieve low-privileged code execution on the target. The potential impact includes unauthorized access to and modification of system data and operations, posing a significant business risk.
- Attacker skill level: Low
- Required access: Local code execution
- Business risk: High
Priority actions
Operational Fix
Recommended remediation, mitigation, and detection steps
A time-of-check time-of-use vulnerability has been identified in Apex One/SEP agents, potentially allowing local attackers to escalate privileges. Exploitation requires prior low-privileged code execution on the target system. This internal vulnerability carries a high severity and requires focused attention to mitigate business risk.
- Identify installations with affected agents.
- Reduce exposure or isolate affected systems.
- Apply vendor fixes and validate.
- Monitor for related activity.
