Horizon Alert
Summary of the vulnerability and why it matters
Trend Micro Apex One (mac) agent's cache mechanism contains a vulnerability that could allow a local attacker to escalate privileges on affected systems. This flaw exists within the cache mechanism and could lead to unauthorized elevation of access. The impact of such an escalation can compromise system integrity and data confidentiality.
- Vulnerable: Trend Micro Apex One (mac) agent
- Flaw: Time-of-check time-of-use
- Impact: Local privilege escalation
Attack Path
How an attacker could exploit the issue
A local attacker with the ability to execute low-privileged code on an affected system can exploit a time-of-check time-of-use vulnerability. This flaw exists within the Trend Micro Apex One agent's cache mechanism. Successful exploitation allows the attacker to escalate their privileges on the installation.
- Local execution required.
- Attacker escalates privileges.
- Compromises affected installations.
Live Threat
Current exploitation, exposure, and threat context
This vulnerability could allow an attacker with initial low-level access to gain elevated privileges on an affected system. The attacker would need to be able to run code on the target machine before exploiting this issue. The potential impact includes unauthorized access to sensitive data and system control.
- Attacker skill: Low.
- Required access: Local code execution.
- Business risk: High urgency.
Priority actions
Operational Fix
Recommended remediation, mitigation, and detection steps
This vulnerability in the Trend Micro Apex One agent cache mechanism allows for privilege escalation by a local attacker. Successful exploitation requires the attacker to first gain low-privileged code execution capabilities on the target system. The vendor has addressed this through updates in mid to late 2025.
- Find affected assets.
- Reduce exposure or isolate risk.
- Fix, verify, and monitor.
