CVE-2025-21377: NTLM Hash Disclosure Spoofing Vulnerability

Published Feb 11, 2025
·
Updated

NTLM Hash Disclosure Spoofing Vulnerability

Affected Software

58 affected componentsFixes available
Microsoft Windows Server 2012 R2
Patch availablePatch available
Microsoft Windows Server 2025
Patch availablePatch available
Microsoft Windows Server 2025
Patch availablePatch available
Microsoft Windows Server 2012 R2
Patch availablePatch available
Microsoft Windows Server 2022, 23H2 Edition
Patch available
Microsoft Windows Server 2008
Patch availablePatch available
Microsoft Windows Server 2008
Patch availablePatch available
Microsoft Windows Server 2008
Patch availablePatch available
Microsoft Windows Server 2008
Patch availablePatch available
Microsoft Windows Server 2019
Patch available
Microsoft Windows Server 2019
Patch available
Microsoft Windows 11=23H2
Patch available
Microsoft Windows 11=22H2
Patch available
Microsoft Windows 11=22H2
Patch available
Microsoft Windows 11=24H2
Patch availablePatch available
Microsoft Windows 11=24H2
Patch availablePatch available
Microsoft Windows 11=23H2
Patch available
Microsoft Windows Server 2022
Patch availablePatch available
Microsoft Windows Server 2022
Patch availablePatch available
Microsoft Windows Server 2012
Patch availablePatch available
Microsoft Windows Server 2012
Patch availablePatch available
Microsoft Windows 10 1507<10.0.10240.20915
Microsoft Windows 10 1507<10.0.10240.20915
Microsoft Windows 10 1607<10.0.14393.7785
Microsoft Windows 10 1607<10.0.14393.7785
Microsoft Windows 10 1809<10.0.17763.6893
Microsoft Windows 10 1809<10.0.17763.6893
Microsoft Windows 10 21h2<10.0.19044.5487
Microsoft Windows 10 22h2<10.0.19045.5487
Microsoft Windows 11 22h2<10.0.22621.4890
Microsoft Windows 11 23h2<=10.0.22631.4890
Microsoft Windows 11 24h2<10.0.26100.3194
Microsoft Windows Server 2008=sp2
Microsoft Windows Server 2008=sp2
Microsoft Windows Server 2008=r2-sp1
Microsoft Windows Server 2012
Microsoft Windows Server 2012=r2
Microsoft Windows Server 2016<10.0.14393.7785
Microsoft Windows Server 2019<10.0.17763.6893
Microsoft Windows Server 2022<10.0.20348.3207
Microsoft Windows Server 2022 23h2<10.0.25398.1425
Microsoft Windows Server 2025<10.0.26100.3194
Microsoft Windows Server 2016
Patch available
Microsoft Windows Server 2016
Patch available
Microsoft Windows 10=1809
Patch available
Microsoft Windows 10=1809
Patch available
Microsoft Windows 10=22H2
Patch available
Microsoft Windows 10=22H2
Patch available
Microsoft Windows 10=22H2
Patch available
Microsoft Windows 10=1607
Patch available
Microsoft Windows 10=1607
Patch available
Microsoft Windows 10=21H2
Patch available
Microsoft Windows 10=21H2
Patch available
Microsoft Windows 10=21H2
Patch available
Microsoft Windows 10
Patch available
Microsoft Windows 10
Patch available
Microsoft Windows Server 2008 R2
Patch availablePatch available
Microsoft Windows Server 2008 R2
Patch availablePatch available

Remediation

Patch Available

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21377

Event History

Feb 11, 2025
CVE Published
via Microsoft·08:00 AM
Data Sourced
via Microsoft·08:00 AM
DescriptionSeverityWeakness
CVE Published
via MITRE·05:58 PM
Data Sourced
via MITRE·05:58 PM
DescriptionSeverity
News Published
via Dark Reading·09:55 PM
News Published
via Dark Reading·10:24 PM
Feb 12, 2025
News Published
via The Register·02:58 AM
News Published
via ZDNet·05:29 PM
News Published
via ZDNet·06:28 PM
Feb 16, 2025
News Published
via The Register·03:01 AM
Mar 25, 2025
News Published
via BleepingComputer·06:22 PM
News Published
via BleepingComputer·06:24 PM

Peer vulnerabilities

Found alongside the following vulnerabilities.

Free Weekly Intel

Don't miss critical vulnerabilities

Join thousands of security professionals who receive our weekly digest of trending CVEs, zero-days, and exploited vulnerabilities.

No spam. Unsubscribe anytime.

Frequently Asked Questions

1

What is the severity of CVE-2025-21377?

CVE-2025-21377 has been classified with a medium severity rating.

2

How do I fix CVE-2025-21377?

To resolve CVE-2025-21377, apply the patches listed in the Microsoft update guide relevant to your affected Windows version.

3

Which software versions are affected by CVE-2025-21377?

CVE-2025-21377 affects various versions of Microsoft Windows, including Windows 10, Windows 11, and Windows Server editions.

4

What type of vulnerability is CVE-2025-21377?

CVE-2025-21377 is classified as an NTLM Hash Disclosure Spoofing Vulnerability.

5

Can CVE-2025-21377 be exploited remotely?

Yes, CVE-2025-21377 could potentially be exploited remotely if systems are not properly patched.

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2026 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203