CVE-2026-58539: Windows Remote Desktop Client Information Disclosure Vulnerability
Out-of-bounds read in Windows RDP allows an unauthorized attacker to disclose information over a network.
Other sources
Windows Remote Desktop Client Information Disclosure 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 10.0.17763.9020Patch KB5099538 - Upgrade
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Fixed in 6.3.9600.23291Patch KB5099444 - Upgrade
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Fixed in 6.2.9200.26226Patch KB5099445 - Upgrade
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Fixed in 10.0.14393.9339Patch KB5099535 - Upgrade
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Fixed in 10.0.26100.33158Patch KB5099536 - Upgrade
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Fixed in 10.0.28000.2525Patch KB5101649 - Upgrade
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Fixed in 10.0.26100.8875Patch KB5101650 - Upgrade
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Fixed in 10.0.19045.7548Patch KB5099539 - Upgrade
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Fixed in 10.0.19044.7548Patch KB5099539 - Upgrade
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Fixed in 10.0.20348.5386Patch KB5099540 - Upgrade
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Fixed in 10.0.26200.8875Patch KB5101650
Event History
Frequently Asked Questions
What does an attacker need to exploit this issue?
The attack can be conducted over a network and does not require attacker privileges. It does require user interaction, according to the CVSS vector.
Which systems should be prioritized for review?
Review Microsoft Windows 10, Windows 11, Windows Server 2012, Windows Server 2016, Windows Server 2019, and Windows Server 2025 systems, including Windows 10 21H2 and 22H2, particularly where users make Remote Desktop connections.
What is the expected security impact?
The reported impact is high confidentiality impact: an attacker may disclose information. The supplied CVSS vector indicates no integrity or availability impact.
Can affected status be determined from the supplied information alone?
Only at the product level. The data identifies affected Windows products but does not provide fixed build numbers, update identifiers, or configuration checks.