CVE-2020-1166
Windows Clipboard Service Elevation of Privilege Vulnerability
Description
An elevation of privilege vulnerability exists when Windows improperly handles calls to Clipboard Service. An attacker who successfully exploited this vulnerability could run arbitrary code in the security context of the local system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. To exploit this vulnerability, an attacker would first have to log on to the system. An attacker could then run a specially crafted application that could exploit the vulnerability and take control over an affected system. The update addresses the vulnerability by correcting how Windows handles calls to Clipboard Service.
INFO
Published Date :
May 21, 2020, 11:15 p.m.
Last Modified :
Aug. 19, 2026, 5:17 p.m.
Remotely Exploit :
No
Source :
[email protected]
Affected Products
The following products are affected by CVE-2020-1166
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 2.0 | HIGH | [email protected] | ||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Apply Cumulative Update KB4556799.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2020-1166.
| URL | Resource |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-1166 | |
| https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1166 | Patch Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2020-1166 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2020-1166
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2020-1166 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2020-1166 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
Aug. 19, 2026
Action Type Old Value New Value Changed Affected [{'vendor': 'Microsoft', 'product': 'Windows 10 Version 1909 for 32-bit Systems', 'versions': [{'status': 'affected', 'version': 'unspecified'}]}, {'vendor': 'Microsoft', 'product': 'Windows 10 Version 1909 for x64-based Systems', 'versions': [{'status': 'affected', 'version': 'unspecified'}]}, {'vendor': 'Microsoft', 'product': 'Windows 10 Version 1909 for ARM64-based Systems', 'versions': [{'status': 'affected', 'version': 'unspecified'}]}, {'vendor': 'Microsoft', 'product': 'Windows Server, version 1909 (Server Core installation)', 'versions': [{'status': 'affected', 'version': 'unspecified'}]}, {'vendor': 'Microsoft', 'product': 'Windows 10 Version 1903 for 32-bit Systems', 'versions': [{'status': 'affected', 'version': 'unspecified'}]}, {'vendor': 'Microsoft', 'product': 'Windows 10 Version 1903 for x64-based Systems', 'versions': [{'status': 'affected', 'version': 'unspecified'}]}, {'vendor': 'Microsoft', 'product': 'Windows 10 Version 1903 for ARM64-based Systems', 'versions': [{'status': 'affected', 'version': 'unspecified'}]}, {'vendor': 'Microsoft', 'product': 'Windows Server, version 1903 (Server Core installation)', 'versions': [{'status': 'affected', 'version': 'unspecified'}]}] [{'vendor': 'Microsoft', 'product': 'Windows 10 Version 1903 for 32-bit Systems', 'versions': [{'status': 'affected', 'version': '10.0.0', 'lessThan': 'publication', 'versionType': 'custom'}]}, {'vendor': 'Microsoft', 'product': 'Windows 10 Version 1903 for ARM64-based Systems', 'versions': [{'status': 'affected', 'version': '10.0.0', 'lessThan': 'publication', 'versionType': 'custom'}]}, {'vendor': 'Microsoft', 'product': 'Windows 10 Version 1903 for x64-based Systems', 'versions': [{'status': 'affected', 'version': '10.0.0', 'lessThan': 'publication', 'versionType': 'custom'}]}, {'vendor': 'Microsoft', 'product': 'Windows 10 Version 1909', 'versions': [{'status': 'affected', 'version': '10.0.0', 'lessThan': 'publication', 'versionType': 'custom'}], 'platforms': ['32-bit Systems', 'ARM64-based Systems', 'x64-based Systems']}, {'vendor': 'Microsoft', 'product': 'Windows Server, version 1903 (Server Core installation)', 'versions': [{'status': 'affected', 'version': '10.0.0', 'lessThan': 'publication', 'versionType': 'custom'}], 'platforms': ['x64-based Systems']}, {'vendor': 'Microsoft', 'product': 'Windows Server, version 1909 (Server Core installation)', 'versions': [{'status': 'affected', 'version': '10.0.0', 'lessThan': 'publication', 'versionType': 'custom'}], 'platforms': ['x64-based Systems']}] Changed Description An elevation of privilege vulnerability exists when Windows improperly handles calls to Clipboard Service, aka 'Windows Clipboard Service Elevation of Privilege Vulnerability'. This CVE ID is unique from CVE-2020-1111, CVE-2020-1121, CVE-2020-1165. An elevation of privilege vulnerability exists when Windows improperly handles calls to Clipboard Service. An attacker who successfully exploited this vulnerability could run arbitrary code in the security context of the local system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. To exploit this vulnerability, an attacker would first have to log on to the system. An attacker could then run a specially crafted application that could exploit the vulnerability and take control over an affected system. The update addresses the vulnerability by correcting how Windows handles calls to Clipboard Service. Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Added Reference https://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-1166 Removed Reference https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1166 Removed Reference Type https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1166 Types: Patch, Vendor Advisory -
CVE Modified by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'Microsoft', 'product': 'Windows 10 Version 1909 for 32-bit Systems', 'versions': [{'status': 'affected', 'version': 'unspecified'}]}, {'vendor': 'Microsoft', 'product': 'Windows 10 Version 1909 for x64-based Systems', 'versions': [{'status': 'affected', 'version': 'unspecified'}]}, {'vendor': 'Microsoft', 'product': 'Windows 10 Version 1909 for ARM64-based Systems', 'versions': [{'status': 'affected', 'version': 'unspecified'}]}, {'vendor': 'Microsoft', 'product': 'Windows Server, version 1909 (Server Core installation)', 'versions': [{'status': 'affected', 'version': 'unspecified'}]}, {'vendor': 'Microsoft', 'product': 'Windows 10 Version 1903 for 32-bit Systems', 'versions': [{'status': 'affected', 'version': 'unspecified'}]}, {'vendor': 'Microsoft', 'product': 'Windows 10 Version 1903 for x64-based Systems', 'versions': [{'status': 'affected', 'version': 'unspecified'}]}, {'vendor': 'Microsoft', 'product': 'Windows 10 Version 1903 for ARM64-based Systems', 'versions': [{'status': 'affected', 'version': 'unspecified'}]}, {'vendor': 'Microsoft', 'product': 'Windows Server, version 1903 (Server Core installation)', 'versions': [{'status': 'affected', 'version': 'unspecified'}]}] -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1166 -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CWE Remap by [email protected]
Jul. 21, 2021
Action Type Old Value New Value Changed CWE CWE-269 NVD-CWE-noinfo -
Initial Analysis by [email protected]
May. 27, 2020
Action Type Old Value New Value Added CVSS V2 NIST (AV:L/AC:L/Au:N/C:C/I:C/A:C) Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Changed Reference Type https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1166 No Types Assigned https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1166 Patch, Vendor Advisory Added CWE NIST CWE-269 Added CPE Configuration OR *cpe:2.3:o:microsoft:windows_10:1903:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_10:1909:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_server_2016:1903:*:*:*:*:*:*:* *cpe:2.3:o:microsoft:windows_server_2016:1909:*:*:*:*:*:*:*