CVE-2021-26415

HIGH

Windows Installer - Elevation of Privilege via Improper Input Validation

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2021-26415. PoCs published by adenkiewicz.

AI-analyzed exploit summary This repository references a PoC for CVE-2021-26415, a local privilege escalation vulnerability in Windows, leveraging symbolic link manipulation via the BaitAndSwitch tool. It points to an external blog post for technical details and a GitHub repo for the compiled exploit.

Description

Windows Installer Elevation of Privilege Vulnerability

Exploits (1)

nomisec WRITEUP 4 stars
by adenkiewicz · poc
https://github.com/adenkiewicz/CVE-2021-26415

This repository references a PoC for CVE-2021-26415, a local privilege escalation vulnerability in Windows, leveraging symbolic link manipulation via the BaitAndSwitch tool. It points to an external blog post for technical details and a GitHub repo for the compiled exploit.

Classification
Writeup 80%
Attack Type
Lpe
Complexity
Moderate
Reliability
Reliable
Target: Microsoft Windows
Auth required
Prerequisites: Local access to the target system · Ability to execute arbitrary code
devstral-2 · analyzed Feb 18, 2026 Full analysis →

References (2)

Core 2
Core References
Third Party Advisory x_refsource_misc
https://www.zerodayinitiative.com/advisories/ZDI-21-409/

Scores

CVSS v3 7.8
EPSS 0.0357
EPSS Percentile 87.9%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-20
Status published
Products (19)
microsoft/windows_10
microsoft/windows_10 20h2
microsoft/windows_10 1607
microsoft/windows_10 1803
microsoft/windows_10 1809
microsoft/windows_10 1909
microsoft/windows_10 2004
microsoft/windows_7
microsoft/windows_8.1
microsoft/windows_rt_8.1
... and 9 more
Published Apr 13, 2021
Tracked Since Feb 18, 2026