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CVE-2021-33742 Details
Description
Windows MSHTML Platform Remote Code Execution Vulnerability
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Feb 4, 2025Exploitation: ActiveAutomatable: NoTechnical Impact: Total
References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-33742 | CISA-ADP | US Government Resource |
| https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-33742 | CVE | PatchVendor Advisory |
| https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-33742 | [email protected] | PatchVendor Advisory |
This CVE is in CISA's Known Exploited Vulnerabilities Catalog
Reference CISA's BOD 22-01 and Known Exploited Vulnerabilities Catalog for further guidance and requirements.
| Vulnerability Name | Date Added | Due Date | Required Action |
|---|---|---|---|
| Microsoft Windows MSHTML Platform Remote Code Execution Vulnerability | Nov 3, 2021 | Nov 17, 2021 | Apply updates per vendor instructions. |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-787 | Out-of-bounds Write | [email protected] |
| CWE-787 | Out-of-bounds Write | CISA-ADP |
Affected Products
| Product | Versions |
|---|---|
| microsoft windows 10 1507 | < 10.0.10240.18967 |
CPE
Remediation
| |
| microsoft windows 10 1607 | < 10.0.14393.4467 |
CPE
Remediation
| |
| microsoft windows 10 1809 | < 10.0.17763.1999 |
CPE
Remediation
| |
| microsoft windows 10 1909 | < 10.0.18363.1621 |
CPE
Remediation
| |
| microsoft windows 10 2004 | < 10.0.19041.1052 |
CPE
Remediation
| |
| microsoft windows 10 20h2 | < 10.0.19042.1052 |
CPE
Remediation
| |
| microsoft windows 10 21h1 | < 10.0.19043.1052 |
CPE
Remediation
| |
| microsoft windows 7 | All versions |
CPE
Remediation
| |
| microsoft windows 8.1 | All versions |
CPE
Remediation
| |
| microsoft windows rt 8.1 | All versions |
CPE
Remediation
| |
| microsoft windows server 2008 | r2 sp1 sp2 |
CPE
Remediation
| |
| microsoft windows server 2012 | r2 |
CPE
Remediation
| |
| microsoft windows server 2016 | < 10.0.14393.4467 |
CPE
Remediation
| |
| microsoft windows server 2019 | < 10.0.17763.1999 |
CPE
Remediation
| |
Change History
15 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Oct 29, 2025 | Modified Analysis | [email protected] |
| Oct 22, 2025 | CVE Modified | CISA-ADP |
| Oct 21, 2025 | CVE Modified | CISA-ADP |
| Oct 21, 2025 | CVE Modified | CISA-ADP |
| Feb 24, 2025 | Modified Analysis | [email protected] |
| Feb 4, 2025 | CVE Modified | CISA-ADP |
| Nov 21, 2024 | CVE Modified | CVE |
| Jul 29, 2024 | Modified Analysis | [email protected] |
| May 14, 2024 | CVE Modified | [email protected] |
| Dec 30, 2023 | CVE Modified | [email protected] |
| Aug 8, 2023 | CWE Remap | [email protected] |
| Jul 12, 2022 | CWE Remap | [email protected] |
| Jun 14, 2021 | Initial Analysis | [email protected] |