SB2026052201 - Multiple vulnerabilities in Trend Micro Apex One
Published: May 22, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 8 vulnerabilities.
1) Relative Path Traversal (CVE-ID: CVE-2026-34926)
CWE-ID: CWE-23 - Relative Path Traversal
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N/E:A/U:Amber
The vulnerability allows a local privileged user to inject malicious code for deployment to agents.
The vulnerability exists due to path traversal in the Apex One server when accessing server directories. A local privileged user can modify a key table on the server to inject malicious code for deployment to agents.
This issue is only exploitable on on-premise Apex One installations.
Note, the vulnerability is being actively exploited in the wild.
2) Origin validation error (CVE-ID: CVE-2026-45206)
CWE-ID: CWE-346 - Origin Validation Error
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to escalate privileges.
The vulnerability exists due to improper origin validation in the Apex One/SEP agent when handling a process protection communication mechanism. A local user can exploit the origin validation flaw to escalate privileges.
Exploitation requires the ability to execute low-privileged code on the target system.
3) Origin validation error (CVE-ID: CVE-2026-34927)
CWE-ID: CWE-346 - Origin Validation Error
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to escalate privileges.
The vulnerability exists due to improper origin validation in the Apex One/SEP agent when handling inter-process communication. A local user can exploit the origin validation flaw to escalate privileges.
Exploitation requires the ability to execute low-privileged code on the target system.
4) Origin validation error (CVE-ID: CVE-2026-34928)
CWE-ID: CWE-346 - Origin Validation Error
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to escalate privileges.
The vulnerability exists due to improper origin validation in the Apex One/SEP agent when handling a named pipe communication mechanism. A local user can exploit the origin validation flaw to escalate privileges.
Exploitation requires the ability to execute low-privileged code on the target system.
5) Origin validation error (CVE-ID: CVE-2026-34929)
CWE-ID: CWE-346 - Origin Validation Error
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to escalate privileges.
The vulnerability exists due to improper origin validation in the Apex One/SEP agent when handling an inter-process communication mechanism. A local user can exploit the origin validation flaw to escalate privileges.
Exploitation requires the ability to execute low-privileged code on the target system.
6) Origin validation error (CVE-ID: CVE-2026-34930)
CWE-ID: CWE-346 - Origin Validation Error
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to escalate privileges.
The vulnerability exists due to improper origin validation in the Apex One/SEP agent when handling a process protection mechanism. A local user can exploit the origin validation flaw to escalate privileges.
Exploitation requires the ability to execute low-privileged code on the target system.
7) Origin validation error (CVE-ID: CVE-2026-45207)
CWE-ID: CWE-346 - Origin Validation Error
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to escalate privileges.
The vulnerability exists due to improper origin validation in the Apex One/SEP agent when handling a process protection communication mechanism. A local user can exploit the origin validation flaw to escalate privileges.
Exploitation requires the ability to execute low-privileged code on the target system.
8) Time-of-check Time-of-use (TOCTOU) Race Condition (CVE-ID: CVE-2026-45208)
CWE-ID: CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to escalate privileges.
The vulnerability exists due to time-of-check time-of-use race condition in the Apex One/SEP agent when handling file or resource access. A local user can win the race condition to escalate privileges.
Exploitation requires the ability to execute low-privileged code on the target system.
Remediation
Install update from vendor's website.