Microsoft Windows
CVE-2019-0845 — Windows IOleCvt Interface Remote Code Execution Vulnerability
Executive Summary
A remote code execution vulnerability exists when the IOleCvt interface renders ASP webpage content. An attacker who successfully exploited the vulnerability could run malicious code remotely to take control of the user’s system. In a web-based attack scenario, an attacker could host a specially crafted website designed to exploit the vulnerability through Microsoft browsers and then convince a user to view the website. An attacker could also embed an ActiveX control marked "safe for initialization" in an application or Microsoft Office document that hosts the browser rendering engine. The attacker could also take advantage of compromised websites and websites that accept or host user-provided content or advertisements. These websites could contain specially crafted content that could exploit the vulnerability. The update addresses the vulnerability by correcting methods exposed when the IOleCvt interface is invoked.
Overview
7.5
CVSS HIGH
Critical
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
CVSS Vector
ATTACK VECTOR
Network
ATTACK COMPLEXITY
High
PRIVILEGES REQUIRED
None
USER INTERACTION
Required
SCOPE
Unchanged
Temporal Score: 6.7
EPSS Score
0.14877
probability of exploitation in the next 30 days
0.96268 percentile - updated 2026-06-20
View on FIRST.org
Affected Products
38 affected products
| Product | KB Article | Severity | Impact | Restart Required |
|---|---|---|---|---|
| Windows 10 for 32-bit Systems | 4493475 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows 10 for x64-based Systems | 4493475 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows 10 Version 1607 for 32-bit Systems | 4493470 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows 10 Version 1607 for x64-based Systems | 4493470 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows 10 Version 1703 for 32-bit Systems | 4493474 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows 10 Version 1703 for x64-based Systems | 4493474 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows 10 Version 1709 for 32-bit Systems | 4493441 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows 10 Version 1709 for ARM64-based Systems | 4493441 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows 10 Version 1709 for x64-based Systems | 4493441 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows 10 Version 1803 for 32-bit Systems | 4493464 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows 10 Version 1803 for ARM64-based Systems | 4493464 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows 10 Version 1803 for x64-based Systems | 4493464 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows 10 Version 1809 for 32-bit Systems | 4493509 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows 10 Version 1809 for ARM64-based Systems | 4493509 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows 10 Version 1809 for x64-based Systems | 4493509 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows 7 for 32-bit Systems Service Pack 1 | 4493472 (Monthly Rollup) 4493448 (Security Only) |
Critical | Remote Code Execution | Yes |
| Windows 7 for x64-based Systems Service Pack 1 | 4493472 (Monthly Rollup) 4493448 (Security Only) |
Critical | Remote Code Execution | Yes |
| Windows 8.1 for 32-bit systems | 4493446 (Monthly Rollup) 4493467 (Security Only) |
Critical | Remote Code Execution | Yes |
| Windows 8.1 for x64-based systems | 4493446 (Monthly Rollup) 4493467 (Security Only) |
Critical | Remote Code Execution | Yes |
| Windows RT 8.1 | 4493446 (Monthly Rollup) |
Critical | Remote Code Execution | Yes |
| Windows Server 2008 for 32-bit Systems Service Pack 2 | 4493471 (Monthly Rollup) 4493458 (Security Only) |
Critical | Remote Code Execution | Yes |
| Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) | 4493471 (Monthly Rollup) 4493458 (Security Only) |
Critical | Remote Code Execution | Yes |
| Windows Server 2008 for Itanium-Based Systems Service Pack 2 | 4493471 (Monthly Rollup) 4493458 (Security Only) |
Critical | Remote Code Execution | Yes |
| Windows Server 2008 for x64-based Systems Service Pack 2 | 4493471 (Monthly Rollup) 4493458 (Security Only) |
Critical | Remote Code Execution | Yes |
| Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) | 4493471 (Monthly Rollup) 4493458 (Security Only) |
Critical | Remote Code Execution | Yes |
| Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1 | 4493472 (Monthly Rollup) 4493448 (Security Only) |
Critical | Remote Code Execution | Yes |
| Windows Server 2008 R2 for x64-based Systems Service Pack 1 | 4493472 (Monthly Rollup) 4493448 (Security Only) |
Critical | Remote Code Execution | Yes |
| Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) | 4493472 (Monthly Rollup) 4493448 (Security Only) |
Critical | Remote Code Execution | Yes |
| Windows Server 2012 | 4493451 (Monthly Rollup) 4493450 (Security Only) |
Critical | Remote Code Execution | Yes |
| Windows Server 2012 (Server Core installation) | 4493451 (Monthly Rollup) 4493450 (Security Only) |
Critical | Remote Code Execution | Yes |
| Windows Server 2012 R2 | 4493446 (Monthly Rollup) 4493467 (Security Only) |
Critical | Remote Code Execution | Yes |
| Windows Server 2012 R2 (Server Core installation) | 4493446 (Monthly Rollup) 4493467 (Security Only) |
Critical | Remote Code Execution | Yes |
| Windows Server 2016 | 4493470 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows Server 2016 (Server Core installation) | 4493470 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows Server 2019 | 4493509 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows Server 2019 (Server Core installation) | 4493509 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows Server, version 1709 (Server Core Installation) | 4493441 (Security Update) |
Critical | Remote Code Execution | Yes |
| Windows Server, version 1803 (Server Core Installation) | 4493464 (Security Update) |
Critical | Remote Code Execution | Yes |
Patches
11 patches
| Article | Type | Restart |
|---|---|---|
4493475 |
Security Update | Yes |
4493470 |
Security Update | Yes |
4493474 |
Security Update | Yes |
4493441 |
Security Update | Yes |
4493464 |
Security Update | Yes |
4493509 |
Security Update | Yes |
4493472 (Monthly Rollup) 4493448 |
Monthly Rollup | Yes |
4493446 (Monthly Rollup) 4493467 |
Monthly Rollup | Yes |
4493446 |
Monthly Rollup | Yes |
4493471 (Monthly Rollup) 4493458 |
Monthly Rollup | Yes |
4493451 (Monthly Rollup) 4493450 |
Monthly Rollup | Yes |
Known Exploits
No known exploits have been linked for this CVE yet. When available, exploit references will be sourced from public repositories and may be unverified, incomplete, or non-functional. Always review code carefully before use in any environment.
Acknowledgments
References
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