CVE-2021-25253

Name: CVE-2021-25253
Creator: NVD / NIST
Published: 2021-04-13T13:15:13.443+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 1.91%

Last modified Jun 17, 2026

CVE-2021-25253 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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.. EPSS estimates a 1.91% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.8/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

1.91%

77.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-732

Affected Software

Vendor	Product	Versions	Update
Trendmicro	Apex One	2019	—
Trendmicro	Officescan	xg	Sp1

References

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

Timeline

Published: Apr 13, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-25253?

How severe is CVE-2021-25253?

CVE-2021-25253 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 1.91% probability of exploitation in the next 30 days.

How do I fix CVE-2021-25253?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-25253?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST