CVEs / CVE-2021-36742
CVE-2021-36742: Trend Micro Multiple Products Improper Input Validation Vulnerability
- Known exploited in the CISA KEV catalog since 3 Nov 2021
- high 7.8 CVSS 3.1 (NVD)
- EPSS 1.48% chance of exploitation in the next 30 days, higher than 73% of CVEs (30 Oct 2026)
- Last changed at its sources
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Summary
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.
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.
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| Trend Micro Trend Micro Apex One | 2019, SaaS | — |
| Trend Micro Trend Micro OfficeScan | XG SP1 | — |
| Trend Micro Trend Micro Worry-Free Business Security | 10.0 SP1 | — |
Exploitation
| In CISA KEV since | 3 Nov 2021 |
|---|---|
| Due date for US federal agencies | 17 Nov 2021 |
| Used in ransomware campaigns | Unknown |
| Required action | Apply updates per vendor instructions. |
Severity
| CVSS 3.1 | 7.8 highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HScored by NVD |
|---|---|
| Weakness | CWE-20 |
References
- CVE-2021-36742 on NVD
- CVE-2021-36742 in the CISA KEV catalog
- https://success.trendmicro.com/dcx/s/solution/000287819?language=en_US (cited by CISA)
- https://success.trendmicro.com/dcx/s/solution/000287820?language=en_US (cited by CISA)
- https://success.trendmicro.com/jp/solution/000287796 Vendor Advisory
- https://success.trendmicro.com/jp/solution/000287815 Vendor Advisory
- https://success.trendmicro.com/solution/000287819 Vendor Advisory
- https://success.trendmicro.com/solution/000287820 Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-36742 US Government Resource
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.