Trend Micro VPN Vulnerability Allows Local Privilege Escalation
A local privilege escalation vulnerability in Trend Micro VPN, CVE-2026-67212, allows attackers with initial code execution to gain higher system privileges.
Trend Micro VPN is currently affected by a local privilege escalation vulnerability, identified by researchers at Zero Day Initiative (ZDI) as ZDI-26-577. This flaw, assigned the CVE identifier CVE-2026-67212, stems from an uncontrolled search path element within the product's OpenSSL configuration.
Exploitation of this vulnerability requires an attacker to first gain the ability to execute low-privileged code on the target system. Once this initial foothold is established, the attacker can leverage the uncontrolled search path element to elevate their privileges to a higher level on the compromised machine. This could allow an attacker to gain administrative access or SYSTEM-level privileges, depending on the specific configuration and context.
The vulnerability has been assigned a Common Vulnerability Scoring System (CVSS) base score of 7.0, indicating a high severity. This score reflects the potential impact of the vulnerability, considering factors such as the complexity of exploitation and the privileges gained.
Trend Micro has been notified of this vulnerability, and details are being disclosed by ZDI. Users of Trend Micro VPN are advised to consult Trend Micro's official security advisories for information regarding affected versions and available patches or mitigation steps. Prompt application of security updates is crucial to protect against potential exploitation.
While the specific details of the uncontrolled search path element are not fully disclosed in the initial advisory, such flaws often arise when a program searches for executable files or configuration data in a directory that an attacker can influence. By placing a malicious file in a location that the vulnerable application searches first, an attacker can trick the application into executing their code with elevated privileges.
This type of vulnerability, where an attacker with limited access can escalate to higher privileges, is a common target for malicious actors. It can be a critical step in a broader attack chain, allowing adversaries to move laterally within a network, access sensitive data, or deploy further malicious payloads.
As with many vulnerabilities disclosed by ZDI, the publication of this advisory serves to inform the security community and end-users about the existence of the flaw. It also prompts vendors to release patches, thereby enhancing the overall security posture of affected systems. Users should remain vigilant and ensure their Trend Micro VPN installations are kept up-to-date with the latest security patches.