CVE-2026-83708: Windows Installer Elevation of Privilege Vulnerability
Stack-based buffer overflow in Windows Installer allows an authorized attacker to elevate privileges locally.
Other sources
Windows Installer Elevation of Privilege Vulnerability
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26300.9711Patch KB5127648 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 6.3.9600.23470Patch KB5126836 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.28000.3231Patch KB5127646 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.14393.9612Patch KB5126868 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 6.2.9200.26434Patch KB5126835 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26100.9711Patch KB5127648 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26100.33650Patch KB5126646 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.17763.9376Patch KB5126651 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.22631.7652Patch KB5126653 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.20348.5761Patch KB5126655 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.19044.7807Patch KB5126657 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26200.9711Patch KB5127648
Event History
Frequently Asked Questions
Which systems should be prioritized for review?
Review systems running the listed Windows 10 or Windows 11 client platforms and the listed Windows Server releases: 2012, 2012 R2, 2016, 2019, 2022, and 2025. The issue is local, so prioritize shared systems and endpoints where lower-privileged users can log on or run code.
What access does an attacker need to exploit this issue?
An attacker must already be authorized on the affected system and able to exploit the vulnerability locally. The provided vector indicates low privileges are required and no user interaction is needed.
Is this remotely exploitable?
The provided attack vector is local (AV:L). The available information does not describe a network-based exploitation path.
What security impact could successful exploitation have?
Successful exploitation can elevate privileges and is rated as having high impact on confidentiality, integrity, and availability. This could allow a low-privileged local attacker to gain more powerful access on the affected system.