NTLM Hash Disclosure Spoofing Vulnerability
External control of file name or path in Windows Core Shell allows an unauthorized attacker to perform spoofing over a network.
- Published
- Oct 14, 2025
- Updated
- Jun 17, 2026
- EPSS
- 0.8% · 55th percentile
- CWE
- CWE-73
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Report tools
Action score
26
Monitor
Low priority for now.
- CVSS
- 26 / 40 · 6.5 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.8%
CISA SSVC decision
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- —
- CNA · microsoft
- 6.5
- NVD has not scored this yet; the score shown is the CNA’s.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| microsoft | windows 10 1507 | cpe:2.3:o:microsoft:windows_10_1507 |
| microsoft | windows 10 1607 | cpe:2.3:o:microsoft:windows_10_1607 |
| microsoft | windows 10 1809 | cpe:2.3:o:microsoft:windows_10_1809 |
| microsoft | windows 10 21h2 | cpe:2.3:o:microsoft:windows_10_21h2 |
| microsoft | windows 10 22h2 | cpe:2.3:o:microsoft:windows_10_22h2 |
| microsoft | windows 11 22h2 | cpe:2.3:o:microsoft:windows_11_22h2 |
| microsoft | windows 11 23h2 | cpe:2.3:o:microsoft:windows_11_23h2 |
| microsoft | windows 11 24h2 | cpe:2.3:o:microsoft:windows_11_24h2 |
| microsoft | windows 11 25h2 | cpe:2.3:o:microsoft:windows_11_25h2 |
| microsoft | windows server 2012 | cpe:2.3:o:microsoft:windows_server_2012 |
| microsoft | windows server 2016 | cpe:2.3:o:microsoft:windows_server_2016 |
| microsoft | windows server 2019 | cpe:2.3:o:microsoft:windows_server_2019 |
and 3 more
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- microsoft windows server 2012r2
- microsoft windows server 2016up to 10.0.14393.8519 inclusive
- microsoft windows server 2019before 10.0.17763.7919
- microsoft windows server 2022before 10.0.20348.4294
- microsoft windows server 2022 23h2before 10.0.25398.1913
- microsoft windows server 2025up to 10.0.26100.6899 inclusive
Versions reported by the vendor
Affected version ranges reported by the assigning authority (microsoft). Independent of NVD's CPE analysis and usually ahead of it.
Microsoft Windows 10 Version 1507
- 10.0.10240.0 and later · before 10.0.10240.21161affected
Microsoft Windows 10 Version 1607
- 10.0.14393.0 and later · before 10.0.14393.8519affected
Microsoft Windows 10 Version 1809
- 10.0.17763.0 and later · before 10.0.17763.7919affected
Microsoft Windows 10 Version 21H2
- 10.0.19044.0 and later · before 10.0.19044.6456affected
Microsoft Windows 10 Version 22H2
- 10.0.19045.0 and later · before 10.0.19045.6456affected
Microsoft Windows 11 version 22H2
- 10.0.22621.0 and later · before 10.0.22621.6060affected
Microsoft Windows 11 version 22H3
- 10.0.22631.0 and later · before 10.0.22631.6060affected
Microsoft Windows 11 Version 23H2
- 10.0.22631.0 and later · before 10.0.22631.6060affected
Microsoft Windows 11 Version 24H2
- 10.0.26100.0 and later · before 10.0.26100.6899affected
Microsoft Windows 11 Version 25H2
- 10.0.26200.0 and later · before 10.0.26200.6899affected
Microsoft Windows Server 2012 R2
- 6.3.9600.0 and later · before 6.3.9600.22824affected
Microsoft Windows Server 2012 R2 (Server Core installation)
- 6.3.9600.0 and later · before 6.3.9600.22824affected
Same product
microsoft: all recordsOther highest-scoring records for the same primary product.
- CVE-2021-34527Windows Print Spooler Remote Code Execution VulnerabilityKEV95Now
- CVE-2021-40444Microsoft MSHTML Remote Code Execution VulnerabilityKEV94Now
- CVE-2025-33053Internet Shortcut Files Remote Code Execution VulnerabilityKEV91Now
- CVE-2023-36025Windows SmartScreen Security Feature Bypass VulnerabilityKEV91Now
- CVE-2022-30190Microsoft Windows Support Diagnostic Tool (MSDT) Remote Code Execution VulnerabilityKEV91Now
- CVE-2017-8543Microsoft Windows XP SP3, Windows XP x64 XP2, Windows Server 2003 SP2, Windows Vista, Windows 7 SP1, Windows Server 2008 SP2 and R2 SP1, WinKEV91Now
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| Windows 10 for 32-bit Systems | 10.0.10240.21161 · KB5066837 | Microsoft (MSRC) |
| Windows 10 for x64-based Systems | 10.0.10240.21161 · KB5066837 | Microsoft (MSRC) |
| Windows 10 Version 1607 for 32-bit Systems | 10.0.14393.8519 · KB5066836 | Microsoft (MSRC) |
| Windows 10 Version 1607 for x64-based Systems | 10.0.14393.8519 · KB5066836 | Microsoft (MSRC) |
| Windows 10 Version 1809 for 32-bit Systems | 10.0.17763.7919 · KB5066586 | Microsoft (MSRC) |
| Windows 10 Version 1809 for x64-based Systems | 10.0.17763.7919 · KB5066586 | Microsoft (MSRC) |
| Windows 10 Version 21H2 for 32-bit Systems | 10.0.19044.6456 · KB5066791 | Microsoft (MSRC) |
| Windows 10 Version 21H2 for ARM64-based Systems | 10.0.19044.6456 · KB5066791 | Microsoft (MSRC) |
| Windows 10 Version 21H2 for x64-based Systems | 10.0.19044.6456 · KB5066791 | Microsoft (MSRC) |
| Windows 10 Version 22H2 for 32-bit Systems | 10.0.19045.6456 · KB5066791 | Microsoft (MSRC) |
| Windows 10 Version 22H2 for ARM64-based Systems | 10.0.19045.6456 · KB5066791 | Microsoft (MSRC) |
| Windows 10 Version 22H2 for x64-based Systems | 10.0.19045.6456 · KB5066791 | Microsoft (MSRC) |
| Windows 11 Version 22H2 for ARM64-based Systems | 10.0.22621.6060 · KB5066793 | Microsoft (MSRC) |
| Windows 11 Version 22H2 for x64-based Systems | 10.0.22621.6060 · KB5066793 | Microsoft (MSRC) |
| Windows 11 Version 23H2 for ARM64-based Systems | 10.0.22631.6060 · KB5066793 | Microsoft (MSRC) |
| Windows 11 Version 23H2 for x64-based Systems | 10.0.22631.6060 · KB5066793 | Microsoft (MSRC) |
| Windows 11 Version 24H2 for ARM64-based Systems | 10.0.26100.6899 · KB5066835 | Microsoft (MSRC) |
| Windows 11 Version 24H2 for x64-based Systems | 10.0.26100.6899 · KB5066835 | Microsoft (MSRC) |
| Windows 11 Version 25H2 for ARM64-based Systems | 10.0.26200.6899 · KB5066835 | Microsoft (MSRC) |
| Windows 11 Version 25H2 for x64-based Systems | 10.0.26200.6899 · KB5066835 | Microsoft (MSRC) |
| Windows Server 2012 R2 | 6.3.9600.22824 · KB5066873 | Microsoft (MSRC) |
| Windows Server 2012 R2 (Server Core installation) | 6.3.9600.22824 · KB5066873 | Microsoft (MSRC) |
| Windows Server 2016 | 10.0.14393.8519 · KB5066836 | Microsoft (MSRC) |
| Windows Server 2016 (Server Core installation) | 10.0.14393.8519 · KB5066836 | Microsoft (MSRC) |
| Windows Server 2019 | 10.0.17763.7919 · KB5066586 | Microsoft (MSRC) |
| Windows Server 2019 (Server Core installation) | 10.0.17763.7919 · KB5066586 | Microsoft (MSRC) |
| Windows Server 2022 | 10.0.20348.4294 · KB5066782 | Microsoft (MSRC) |
| Windows Server 2022 (Server Core installation) | 10.0.20348.4294 · KB5066782 | Microsoft (MSRC) |
| Windows Server 2022, 23H2 Edition (Server Core installation) | 10.0.25398.1913 · KB5066780 | Microsoft (MSRC) |
| Windows Server 2025 | 10.0.26100.6899 · KB5066835 | Microsoft (MSRC) |
+1
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
- CVE-2025-33053126 days apartInternet Shortcut Files Remote Code Execution VulnerabilityKEV91Now
- CVE-2024-43451336 days apartNTLM Hash Disclosure Spoofing VulnerabilityKEV81Now
- CVE-2025-24054217 days apartNTLM Hash Disclosure Spoofing VulnerabilityKEV69This week
- CVE-2025-21377245 days apartNTLM Hash Disclosure Spoofing Vulnerability38Monitor
- CVE-2024-38049462 days apartWindows Distributed Transaction Coordinator Remote Code Execution Vulnerability32Monitor
- CVE-2025-592000 days apartData Sharing Service Spoofing Vulnerability30Monitor
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- A user must open a link or visit a page.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- high · data can be read
- Integrity
- none
- Availability
- none
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- None
- Availability impact
- None
Weakness class (CWE)
CWE-73 · External Control of File Name or PathCVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
nvd-secondary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
- Subverting Environment Variable ValuesCAPEC-13likelihood: High · Very High
- Leverage Alternate EncodingCAPEC-267likelihood: High · High
- Using Slashes and URL Encoding Combined to Bypass Validation LogicCAPEC-64likelihood: High · High
- URL EncodingCAPEC-72likelihood: High · High
- Manipulating Web Input to File System CallsCAPEC-76likelihood: High · Very High
- Using Escaped Slashes in Alternate EncodingCAPEC-78likelihood: High · High
- Using Slashes in Alternate EncodingCAPEC-79likelihood: High · High
- Using UTF-8 Encoding to Bypass Validation LogicCAPEC-80likelihood: High · High
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Vendor advisories and official records. Exploit/PoC links are deliberately left out.