CVE-2021-36742 Trend Micro Apex One, Apex One as a Service, and Worry-Free Business Security: software flaw
In plain words: A mistake in the software that attackers have found a way to abuse. Depends on the product — see the description and the vendor advisory.
Confirmed exploited by CISA on · US federal patch deadline Nov 17, 2021
What to do
- Install Trend Micro's security update for Apex One, Apex One as a Service, and Worry-Free Business Security. If no update exists, follow the vendor's workaround or stop using the product until one ships.
- Keep a list of every internet-facing server you run so nothing is forgotten.
- Patch anything in this catalog first, ahead of normal patch cycles.
- Put admin and file-transfer apps behind a VPN or single sign-on instead of the open internet.
Who is affected
Work IT. Aimed mostly at company systems — you are affected through the companies you use, not your own phone.
What's at risk: Mass data theft and ransomware: a single flaw in a file-transfer or email server has exposed thousands of organisations at once.
The details
- Official name
- Trend Micro Multiple Products Improper Input Validation Vulnerability
- Product
- Trend Micro Apex One, Apex One as a Service, and Worry-Free Business Security
- CISA description
- Trend Micro Apex One, Apex One as a Service, and Worry-Free Business Security contain an improper input validation vulnerability that allows for privilege escalation.
- Type of flaw
- Software flaw (CWE-20)
- Confirmed exploited
- Nov 3, 2021
- US federal patch deadline
- Nov 17, 2021
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Answering about CVE-2021-36742 ·
Questions about CVE-2021-36742
Is CVE-2021-36742 being exploited?
Yes. CISA added CVE-2021-36742 to its Known Exploited Vulnerabilities catalog on Nov 3, 2021, which means there is reliable evidence of real-world attacks.
How do I fix CVE-2021-36742?
Install Trend Micro's security update for Apex One, Apex One as a Service, and Worry-Free Business Security. If no update exists, follow the vendor's workaround or stop using the product until one ships. Keep a list of every internet-facing server you run so nothing is forgotten.
Am I affected by CVE-2021-36742?
Only if you use Trend Micro Apex One, Apex One as a Service, and Worry-Free Business Security. Aimed mostly at company systems — you are affected through the companies you use, not your own phone.