PT-2021-1682 · Microsoft · Windows

Jeongoh Kyea · Published 2021-01-12 · Updated 2026-03-10 · CVE-2021-1697

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 (affected versions not specified)

Description The issue is related to an elevation of privilege vulnerability in the Windows InstallService component, which is caused by errors in privilege management. Exploitation of this issue may allow an attacker to elevate their privileges using a specially crafted application. It affects the system and allows attackers to gain elevated access.

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

LPE

Improper Privilege Management

Weakness Enumeration

CWE-269

CWE-264

Related Identifiers

BDU:2021-00338

CVE-2021-1697

ZDI-21-021

Affected Products

Windows

References · 11

• https://osv.dev/vulnerability/CVE-2021-1697 · Vendor Advisory
• https://bdu.fstec.ru/vul/2021-00338 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-1697 · Security Note
• https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2021-1697 · Vendor Advisory
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-1697 · Vendor Advisory
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-1697 · Security Note
• https://zerodayinitiative.com/advisories/ZDI-21-021 · Security Note
• https://t.me/cibsecurity/21996 · Telegram Post
• https://cybersecurity-help.cz/vdb/SB2021011218 · Note
• https://t.me/cvenotify/8529 · Telegram Post
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-1697 · Note