Exploitation Summary
EIP tracks 1 public exploit for CVE-2021-43883. PoCs published by jbaines-r7.
AI-analyzed exploit summary This is a minimized proof-of-concept for CVE-2021-43883, demonstrating arbitrary file creation via a race condition in the Windows Installer. It does not execute shellcode but proves the vulnerability by copying itself to a target path.
Description
Windows Installer Elevation of Privilege Vulnerability
Exploits (1)
nomisec
WORKING POC
79 stars
by jbaines-r7 · poc
https://github.com/jbaines-r7/shakeitoff
This is a minimized proof-of-concept for CVE-2021-43883, demonstrating arbitrary file creation via a race condition in the Windows Installer. It does not execute shellcode but proves the vulnerability by copying itself to a target path.
Classification
Working Poc 95%
Attack Type
Lpe
Complexity
Moderate
Reliability
Reliable
Target:
Microsoft Windows Installer
Auth required
Prerequisites:
Valid MSI file · Empty directory with trailing backslash · Target file path
devstral-2 · analyzed Feb 16, 2026
Full analysis →
References (1)
Core 1
Core References
Patch, Vendor Advisory x_refsource_misc
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-43883
Scores
CVSS v3
7.8
EPSS
0.1196
EPSS Percentile
95.6%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
total
Details
Status
published
Products (20)
microsoft/windows_10
(2 CPE variants)
microsoft/windows_10
20h2 (3 CPE variants)
microsoft/windows_10
21h1 (3 CPE variants)
microsoft/windows_10
21h2 (3 CPE variants)
microsoft/windows_10
1607 (2 CPE variants)
microsoft/windows_10
1809 (3 CPE variants)
microsoft/windows_10
1909 (3 CPE variants)
microsoft/windows_10
2004 (3 CPE variants)
microsoft/windows_11
(2 CPE variants)
microsoft/windows_7
(2 CPE variants)
... and 10 more
Published
Dec 15, 2021
Tracked Since
Feb 18, 2026