CVE-2026-20872: NTLM Hash Disclosure Spoofing Vulnerability
External control of file name or path in Windows NTLM allows an unauthorized attacker to perform spoofing over a network.
Other sources
NTLM Hash Disclosure Spoofing Vulnerability
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
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Fixed in 6.3.9600.22968Patch KB5073696 - Upgrade
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Fixed in 6.2.9200.25868Patch KB5073698 - Upgrade
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Fixed in 6.1.7601.28117Patch KB5073699 - Upgrade
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Fixed in 6.0.6003.23717Patch KB5073700 - Upgrade
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Fixed in 10.0.14393.8783Patch KB5073722 - Upgrade
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Fixed in 10.0.26100.32230Patch KB5073379 - Upgrade
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Fixed in 10.0.26100.7623Patch KB5074109 - Upgrade
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Fixed in 10.0.22631.6491Patch KB5073455 - Upgrade
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Fixed in 10.0.25398.2092Patch KB5073450 - Upgrade
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Fixed in 10.0.26200.7623Patch KB5074109 - Upgrade
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Fixed in 10.0.19045.6809Patch KB5073724 - Upgrade
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Fixed in 10.0.19044.6809Patch KB5073724 - Upgrade
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Fixed in 10.0.20348.4648Patch KB5073457 - Upgrade
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Fixed in 10.0.17763.8276Patch KB5073723
Event History
Frequently Asked Questions
What is the severity of CVE-2026-20872?
CVE-2026-20872 is a critical vulnerability due to its potential for NTLM hash disclosure and network spoofing.
How do I fix CVE-2026-20872?
To fix CVE-2026-20872, apply the relevant security patches provided by Microsoft for the affected Windows products.
What products are affected by CVE-2026-20872?
CVE-2026-20872 affects various versions of Windows Server and Windows operating systems, including Windows Server 2012, 2008 R2, and Windows 10.
What are the potential impacts of CVE-2026-20872?
The potential impacts of CVE-2026-20872 include unauthorized access to NTLM hashes and the ability to perform network spoofing attacks.
Is CVE-2026-20872 being actively exploited?
As of now, there is no public information confirming that CVE-2026-20872 is under active exploitation, but it is a high-risk vulnerability.