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Apex OneApplication · Trendmicro

CVE-2026-45208

HIGH · 7.8 CVSS v3.1 Published 2026-05-21
Fix available
A fix is available. Upgrade to 14.0.0.17079 / 14.0.20731 or later.
See remediation →
80/100
Remediation priority · High
Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
A time-of-check time-of-use vulnerability in the Apex One/SEP agent 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.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · moderate confidence

A time-of-check time-of-use (TOCTOU) race condition vulnerability in the Apex One/Symantec Endpoint Protection agent allows a local attacker with initial low-privileged code execution to escalate privileges by exploiting the time gap between security state verification and the actual use of that verified state.

MitigationApply vendor-provided security patches for Apex One/SEP when released; until then, limit local system access to trusted personnel and monitor for suspicious process activity.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Apex OneApplication
Affected:< 14.0.0.17079< 14.0.20731

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify if Apex One or SEP agent is installed
    Check for Trend Micro Apex One or Symantec Endpoint Protection (SEP) agent installation on the system - look for the product in installed programs or running processes
    Affected if Either Apex One or SEP agent is present on the system
  2. Determine the installed Apex One version
    Locate the Apex One version information - typically found in the product UI, installation directory, or via system information tools that query the security agent
    Affected if The version is lower than 14.0.0.17079 or lower than 14.0.20731 (whichever version scheme applies)
  3. Verify the exact build or patch number
    Retrieve the full version string including any build or patch numbers from the installed security agent
    Affected if The complete version string falls below the fixed releases (14.0.0.17079 or 14.0.20731)
  4. Confirm the vulnerability context applies
    Verify that the system allows local user accounts with low-privileged access to interact with the security agent components
    Affected if Non-administrative local users can execute code on the system and access the Apex One/SEP agent directories or binaries

A system is affected if Apex One or SEP agent is installed with a version below 14.0.0.17079 or 14.0.20731, and low-privileged local users can access the agent's system resources.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 14.0.0.17079 / 14.0.20731 or later
Fixed in 14.0.0.1707914.0.20731
Interim mitigation

Apply vendor-provided security patches for Apex One/SEP when released; until then, limit local system access to trusted personnel and monitor for suspicious process activity.

Recommended fix Moderate confidence

Apex One 14.0.0.17079 or later, or 14.0.20731 or later

  1. Identify the current Apex One or SEP agent version installed on affected systems
  2. Verify the exact version by checking the product UI or registry (typically at HKEY_LOCAL_MACHINE\SOFTWARE\TrendMicro\Apex One)
  3. Download the latest Apex One patch from the Trend Micro Customer Portal at success.trendmicro.com or from your designated support channel
  4. Schedule a maintenance window for the upgrade, ensuring adequate backups are in place
  5. Apply the upgrade to the Apex One server first, following standard deployment procedures
  6. Deploy the updated agent to all affected endpoints using the Apex One console or your standard software distribution method
  7. Verify successful installation by checking agent version on endpoints (should show version >= 14.0.0.17079 or >= 14.0.20731)
  8. Confirm the vulnerability is remediated by verifying the security patch is applied
Caveat Review Trend Micro release notes for the target version to check for any configuration or compatibility changes before upgrading

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Apex One Scoped from the published advisory
  • Consultation4.0 h
  • Implementation8.0 h
  • Testing6.0 h
  • Review / QA3.0 h
21.0 hours of engineering $3,680
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $5,888.

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2026-45208 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data