CVE-2026-96047: Windows Installer Elevation of Privilege Vulnerability
This Microsoft advisory covers CVE-2026-96047 in Windows Server 2012 R2, Windows Server 2016 and Windows Server 2019.
- CVE-2026-96047
Key facts
- Vendor rating
- High, CVSS 7
- CVSS vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C· base score 7, scored by microsoftAttack vector: local. Attack complexity: high. Privileges required: low. User interaction: none. Scope: unchanged. Confidentiality impact: high. Integrity impact: high. Availability impact: high.- Weakness
- CWE-416: Use After Free
- CWE-822: Untrusted Pointer Dereference
- CISA KEV
- Not listed (catalogue checked )
- Fixed in
- KB5126835 (build 6.2.9200.26434), KB5126836 (build 6.3.9600.23470), KB5126868 (build 10.0.14393.9612) and 5 more below
- Source published
- Listed by VulniPulse
Compiled by VulniPulse from the linked sources. How records are collected and checked.
Affected products & platforms
Description
Windows Installer Elevation of Privilege Vulnerability
Affected products named by the advisory: Windows Server 2012; Windows Server 2012 R2; Windows Server 2016; Windows Server 2019; and 2 more.
Affected products named by the advisory: Windows Server 2022; Windows Server 2025.
Text from the source record.
How to fix CVE-2026-96047
Upgrade to a fixed release named by Microsoft:
- KB5126835 (build 6.2.9200.26434)
- KB5126836 (build 6.3.9600.23470)
- KB5126868 (build 10.0.14393.9612)
- KB5126651 (build 10.0.17763.9376)
- KB5126657 (build 10.0.19045.7807)
- KB5126655 (build 10.0.20348.5761)
- KB5126653 (build 10.0.22631.7652)
- KB5127648 (build 10.0.26300.9711)
Vendor guidance
- Install the applicable security update for your platform: KB5126835, KB5126836, KB5126868, KB5126651, KB5126657, KB5126655 (see the Microsoft Update Catalog).
End-of-life dates for Windows Server
More Microsoft Server advisories
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Microsoft Server advisories, November 2026All Microsoft Server advisories
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