Windows SMB Server Elevation of Privilege Vulnerability
Improper access control in Windows SMB Server allows an authorized attacker to elevate privileges over a network.
- Published
- Oct 14, 2025
- Updated
- Jun 17, 2026
- EPSS
- 1.0% · 62th percentile
- CWE
- CWE-284
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Report tools
Action score
30
Monitor
Low priority for now.
- CVSS
- 30 / 40 · 7.5 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 1.0%
CISA SSVC decision
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- —
- CNA · microsoft
- 7.5
- NVD has not scored this yet; the score shown is the CNA’s.
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/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 2008 | cpe:2.3:o:microsoft:windows_server_2008 |
| microsoft | windows server 2012 | cpe:2.3:o:microsoft:windows_server_2012 |
| microsoft | windows server 2016 | cpe:2.3:o:microsoft:windows_server_2016 |
and 4 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 2008all versions
- microsoft windows server 2008r2
- microsoft windows server 2012all versions
- 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 2008 R2 Service Pack 1
- 6.1.7601.0 and later · before 6.1.7601.27974affected
Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation)
- 6.1.7601.0 and later · before 6.1.7601.27974affected
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 2008 for 32-bit Systems Service Pack 2 | 6.0.6003.23571 · KB5066874 | Microsoft (MSRC) |
| Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) | 6.0.6003.23571 · KB5066874 | Microsoft (MSRC) |
| Windows Server 2008 for x64-based Systems Service Pack 2 | 6.0.6003.23571 · KB5066874 | Microsoft (MSRC) |
| Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) | 6.0.6003.23571 · KB5066874 | Microsoft (MSRC) |
| Windows Server 2008 R2 for x64-based Systems Service Pack 1 | 6.1.7601.27974 · KB5066872 | Microsoft (MSRC) |
| Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) | 6.1.7601.27974 · KB5066872 | Microsoft (MSRC) |
| Windows Server 2012 | 6.2.9200.25722 · KB5066875 | Microsoft (MSRC) |
| Windows Server 2012 (Server Core installation) | 6.2.9200.25722 · KB5066875 | 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) |
+9
Exploit status
Proof of concept available
A public proof of concept or detection signature exists. Exploit knowledge is out there; don't delay patching.
Evidence
- Proof-of-concept repository on GitHub ×1
Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.
| Source | Kind | Date |
|---|---|---|
| Proof-of-concept repository on GitHub | stars:208 | 2026-03-30 |
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.
- Published
- First PoC+166 d
- TodaySep 30, 2026+351 d
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-2025-33073126 days apartWindows SMB Client Elevation of Privilege VulnerabilityKEV90Now
- CVE-2025-592300 days apartWindows Remote Access Connection Manager Elevation of Privilege VulnerabilityKEV62This week
- CVE-2025-21293273 days apartActive Directory Domain Services Elevation of Privilege Vulnerability41Plan
- CVE-2025-5409835 days apartWindows Hyper-V Elevation of Privilege Vulnerability32Monitor
- CVE-2025-587140 days apartWindows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability31Monitor
- CVE-2025-592010 days apartNetwork Connection Status Indicator (NCSI) Elevation of Privilege Vulnerability31Monitor
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.
- A low-privileged account is enough.
- No user action is required.
- Special conditions such as timing or configuration are required.
If successful
- Confidentiality
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- High
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
CWE-284 · Improper Access ControlCVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
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)
- Embedding Scripts within ScriptsCAPEC-19likelihood: High · High
- Malicious Logic InsertionCAPEC-441likelihood: Medium · High
- Modification of Windows Service ConfigurationCAPEC-478likelihood: Low · High
- Malicious Root CertificateCAPEC-479likelihood: Low · Low
- Intent SpoofCAPEC-502
- WebView ExposureCAPEC-503
- Data Injected During ConfigurationCAPEC-536likelihood: Low · High
- Incomplete Data Deletion in a Multi-Tenant EnvironmentCAPEC-546likelihood: Low · Medium
ATT&CK techniques
- RootkitT1014
- Obfuscated Files or Information: Embedded PayloadsT1027.009
- Boot or Logon Initialization ScriptsT1037
- Taint shared contentT1080
- Server Software Component: Terminal Services DLLT1505.005
- Pre-OS Boot:BootkitT1542.003
- Create or Modify System ProcessT1543
- Create or Modify System Process: Launch AgentT1543.001
- Create or Modify System Process:Windows ServiceT1543.003
- Create or Modify System Process: Launch DaemonT1543.004
- Event Triggered Execution:Change Default File AssociationT1546.001
- Event Triggered Execution:.bash_profile and .bashrcT1546.004
- Event Triggered Execution: Accessibility FeaturesT1546.008
- Event Triggered Execution: Installer PackagesT1546.016
- Boot or Logon Autostart ExecutionT1547
- Boot or Logon Autostart Execution:Kernel Modules and ExtensionsT1547.006
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
- msrc.microsoft.com/update-guide/vulnerability/CVE-2025-58726
- www.vicarius.io/vsociety/posts/cve-2025-58726-detection-script-improper-access-control-affecting-smb-server-by-microsoft
- www.vicarius.io/vsociety/posts/cve-2025-58726-mitigation-script-improper-access-control-affecting-smb-server-by-microsoft
Vendor advisories and official records. Exploit/PoC links are deliberately left out.