PT-2021-2620 · Microsoft · Windows Installer+1

Adrian Denkiewicz · CVE-2021-26415 · Published 2021-04-13 · Updated 2026-03-10

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions: Windows Installer (affected versions not specified)

Description: The issue is related to errors in privilege management within the Windows Installer component of Microsoft Windows operating systems. This can allow an attacker to elevate their privileges. An elevation-of-privilege vulnerability exists, enabling attackers to affect the system.

Recommendations: At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

LPE

RCE

Weakness Enumeration

CWE-20

CWE-264

Related Identifiers

BDU:2021-02110

CVE-2021-26415

ZDI-21-409

Affected Products

Windows

Windows Installer

References · 16

• 🔥 https://github.com/adenkiewicz/CVE-2021-26415 · Exploit
• https://zerodayinitiative.com/advisories/ZDI-21-409 · Security Note
• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2021-26415 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-26415 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-26415 · Security Note
• https://bdu.fstec.ru/vul/2021-02110 · Security Note
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26415 · Vendor Advisory
• https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2021-26415 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-26415 · Vendor Advisory
• https://t.me/cvenotify/13390 · Telegram Post
• https://t.me/hybgl/854 · Telegram Post
• https://t.me/cybersecuritytechnologies/3219 · Telegram Post
• https://t.me/ckure/7714 · Telegram Post
• https://t.me/cvenotify/13298 · Telegram Post
• https://t.me/cybersecuritytechnologies/3186 · Telegram Post