PatchSiren cyber security CVE debrief
CVE-2025-71213 Trend Micro, Inc. CVE debrief
CVE-2025-71213 is a high-severity local privilege escalation issue affecting Trend Micro Apex One. The vulnerability is described as an origin validation error, and exploitation requires an attacker to first achieve low-privileged code execution on the target system. Once that foothold exists, the issue can be used to escalate privileges on affected installations.
- Vendor
- Trend Micro, Inc.
- Product
- TrendAI Apex One
- CVSS
- HIGH 7.8
- CISA KEV
- Not listed in stored evidence
- Original CVE published
- 2026-05-21
- Original CVE updated
- 2026-05-21
- Advisory published
- 2026-05-21
- Advisory updated
- 2026-05-21
Who should care
Security teams responsible for Trend Micro Apex One, endpoint administration, and systems where untrusted or low-privileged code can run. This is especially important on hosts where a local foothold would meaningfully increase impact.
Technical summary
The source materials describe an origin validation error (CWE-346) in Trend Micro Apex One. NVD lists the CVSS v3.1 vector as AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H, indicating a local attack path with low privileges required and no user interaction. The description also states that the attacker must first obtain the ability to execute low-privileged code on the target before privilege escalation is possible.
Defensive priority
High. A local privilege escalation path can convert a limited foothold into full administrative control on affected Apex One installations.
Recommended defensive actions
- Review Trend Micro's advisory for CVE-2025-71213 and apply the vendor-recommended fix or mitigation from the official guidance.
- Restrict opportunities for low-privileged code execution on endpoints running Apex One, since exploitation requires an initial local foothold.
- Prioritize patching on systems that are exposed to interactive users, third-party tools, or other local execution vectors.
- Validate endpoint hardening and least-privilege controls so a local compromise cannot easily become elevated access.
- Monitor for unusual privilege changes or suspicious local activity on affected hosts.
Evidence notes
The debrief is based on the CVE description, NVD metadata, and the two official references supplied in the source corpus. The description identifies Trend Micro Apex One and states that an attacker must first execute low-privileged code locally. NVD metadata records the CVSS vector AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H and CWE-346. Official references point to Trend Micro guidance and a ZDI advisory.
Official resources
Publicly disclosed in NVD on 2026-05-21, with official references to Trend Micro and ZDI advisories. The source corpus does not indicate KEV inclusion.