CVE-2026-54126: Windows Remote Desktop Protocol (RDP) Information Disclosure Vulnerability
This Microsoft advisory covers CVE-2026-54126 in Windows Server 2019, Windows Server 2022 and Windows Server 2025.
- CVE-2026-54126
Key facts
- Vendor rating
- Medium, CVSS 6.5
- CISA KEV
- Not listed (catalogue checked )
- Fixed in
- KB5099538 (build 10.0.17763.9020), KB5099540 (build 10.0.20348.5386), KB5099539 (build 10.0.19045.7548) 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 Remote Desktop Protocol (RDP) Information Disclosure Vulnerability
Affected products named by the advisory: Windows Server 2019; Windows Server 2022; Windows Server 2025; Windows Server 2016; and 1 more.
Affected products named by the advisory: Windows Server 2012.
Text from the source record.
How to fix CVE-2026-54126
Upgrade to a fixed release named by Microsoft:
- KB5099538 (build 10.0.17763.9020)
- KB5099540 (build 10.0.20348.5386)
- KB5099539 (build 10.0.19045.7548)
- KB5099536 (build 10.0.26100.33158)
- KB5101650 (build 10.0.26100.8875)
- KB5101649 (build 10.0.28000.2525)
- KB5099535 (build 10.0.14393.9339)
- KB5099445 (build 6.2.9200.26226)
Vendor guidance
- Install the applicable security update for your platform: KB5099538, KB5099540, KB5099539, KB5099536, KB5101650, KB5101649 (see the Microsoft Update Catalog).
End-of-life dates for Windows Server
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Microsoft Server advisories, July 2026All Microsoft Server advisories
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