CVE-2021-36742
Trend Micro Multiple Products Improper Input Validation Vulnerability
- High 7.8
- Exploited: added to CISA KEV 3 Nov 2021
Description
A improper input validation vulnerability in Trend Micro Apex One, Apex One as a Service, OfficeScan XG and Worry-Free Business Security 10.0 SP1 allows 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.
Key facts
- Published
- 29 Jul 2021
- Last changed
- 21 Oct 2025
- Assigned by
- trendmicro
- KEV added
- 3 Nov 2021
- KEV fix due
- 17 Nov 2021
- EPSS
- 1.482% likely to be exploited in the next 30 days, higher than 74.379% of CVEs (scores for 15 Nov 2026)
- SSVC (CISA)
- Exploitation: active; Automatable: no; Technical impact: total
Severity scores
Each score is shown as its source gave it. They are not averaged or merged.
- 7.8CVSS 3.1, Highfrom CISA (ADP container)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
What to do
- Apply updates per vendor instructions.CISA KEV required action
Historical context and remediation
This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.
No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.
Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Trend Micro | Trend Micro Apex One |
|
| Trend Micro | Trend Micro OfficeScan |
|
| Trend Micro | Trend Micro Worry-Free Business Security |
|
Timeline
- 29 Jul 2021 Published
- 3 Nov 2021 CVE-2021-36742 added to CISA KEV
- 3 Nov 2021 Added to the CISA KEV catalogue