CVE-2021-25253

HIGH

Trend Micro Apex One <SP1 - Privilege Escalation

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2021-25253. PoCs published by msd0pe-1.

AI-analyzed exploit summary This repository provides a functional exploit for CVE-2021-25253, a local privilege escalation vulnerability in Trend Micro OfficeScan Client 10.0. The exploit leverages incorrect ACL permissions on the OfficeScan client folder to replace executable files with malicious payloads, achieving SYSTEM-level privileges.

Description

An improper access control vulnerability in Trend Micro Apex One, Trend Micro Apex One as a Service and OfficeScan XG SP1 on a resource used by the service could allow a local attacker to escalate privileges on affected installations. Please note: an attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability.

Exploits (1)

nomisec WORKING POC 1 stars
by msd0pe-1 · poc
https://github.com/msd0pe-1/CVE-2021-25253

This repository provides a functional exploit for CVE-2021-25253, a local privilege escalation vulnerability in Trend Micro OfficeScan Client 10.0. The exploit leverages incorrect ACL permissions on the OfficeScan client folder to replace executable files with malicious payloads, achieving SYSTEM-level privileges.

Classification
Working Poc 95%
Attack Type
Lpe
Complexity
Trivial
Reliability
Reliable
Target: Trend Micro OfficeScan Client <= 10.0
No auth needed
Prerequisites: Access to the target system · Ability to replace executable files in the OfficeScan Client directory
devstral-2 · analyzed Feb 18, 2026 Full analysis →

References (3)

Core 3
Core References
Vendor Advisory x_refsource_misc
https://success.trendmicro.com/solution/000286019
Vendor Advisory x_refsource_misc
https://success.trendmicro.com/solution/000286157
Third Party Advisory, VDB Entry x_refsource_misc
https://www.zerodayinitiative.com/advisories/ZDI-21-401/

Scores

CVSS v3 7.8
EPSS 0.0191
EPSS Percentile 77.1%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-732
Status published
Products (2)
trendmicro/apex_one 2019 (2 CPE variants)
trendmicro/officescan xg sp1
Published Apr 13, 2021
Tracked Since Feb 18, 2026