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CVE.org (no NVD analysis yet)· CNA microsoft

CVE-2026-119959: Windows Hyper-V Spoofing Vulnerability

MediumCVSS 5.3 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 21/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.30% (FIRST EPSS).
  • Someone with local access to the system can trigger it. Administrator privileges are required. No user action is required. Special conditions such as timing or configuration are required.
  • Fixed version: Windows 10 Version 1809 for 32-bit Systems 10.0.17763.9487; Windows 10 Version 1809 for x64-based Systems 10.0.17763.9487; Windows 10 Version 21H2 for 32-bit Systems 10.0.19044.7846.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Windows 10 Version 1809 for 32-bit Systems 10.0.17763.9487; Windows 10 Version 1809 for x64-based Systems 10.0.17763.9487; Windows 10 Version 21H2 for 32-bit Systems 10.0.19044.7846 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

Improper access control in Windows Hyper-V allows an authorized attacker to perform spoofing locally.

Published
Nov 10, 2026
Updated
Nov 12, 2026
EPSS
0.3% · 23th percentile

Report tools

JSON

Action score

21

Monitor

Low priority for now.

CVSS
21 / 40 · 5.3 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.3%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
5.3
CNA · microsoft
5.3
agree

CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/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.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-119959

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

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 1809

    • 10.0.17763.0 and later · before 10.0.17763.9487affected

  • Microsoft Windows 10 Version 21H2

    • 10.0.19044.0 and later · before 10.0.19044.7846affected

  • Microsoft Windows 10 Version 22H2

    • 10.0.19045.0 and later · before 10.0.19045.7846affected

  • Microsoft Windows 11 version 23H2

    • 10.0.22631.0 and later · before 10.0.22631.7711affected

  • Microsoft Windows 11 Version 23H2

    • 10.0.22631.0 and later · before 10.0.22631.7711affected

  • Microsoft Windows 11 Version 24H2

    • 10.0.26100.0 and later · before 10.0.26100.9974affected

  • Microsoft Windows 11 Version 25H2

    • 10.0.26200.0 and later · before 10.0.26200.9974affected

  • Microsoft Windows 11 version 26H1

    • 10.0.28000.0 and later · before 10.0.28000.3501affected

  • Microsoft Windows 11 Version 26H2

    • 10.0.26300.0 and later · before 10.0.26300.9974affected

  • Microsoft Windows Server 2019

    • 10.0.17763.0 and later · before 10.0.17763.9487affected

  • Microsoft Windows Server 2019 (Server Core installation)

    • 10.0.17763.0 and later · before 10.0.17763.9487affected

  • Microsoft Windows Server 2022

    • 10.0.20348.0 and later · before 10.0.20348.5870affected

Same product

microsoft: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-112967Windows Xbox Live Networking Service Remote Code Execution Vulnerability
    39Monitor
  • CVE-2026-95962Windows Virtual Filtering Platform (VFP) Remote Code Execution Vulnerability
    36Monitor
  • CVE-2026-95960Windows Advanced Rasterization Platform Elevation of Privilege Vulnerability
    35Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2026-119928Nov 10, 2026 · Windows PrintWorkflowUserSvc Elevation of Privilege Vulnerability
    28Monitor
  • ← EarlierCVE-2026-119954Nov 10, 2026 · Microsoft Windows Search Component Elevation of Privilege Vulnerability
    31Monitor
  • Later →CVE-2026-119974Nov 10, 2026 · Windows Cloud Files Mini Filter Driver Elevation of Privilege Vulnerability
    28Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Windows 10 Version 1809 for 32-bit Systems10.0.17763.9487 · KB5131085Microsoft (MSRC)
Windows 10 Version 1809 for x64-based Systems10.0.17763.9487 · KB5131085Microsoft (MSRC)
Windows 10 Version 21H2 for 32-bit Systems10.0.19044.7846 · KB5131096Microsoft (MSRC)
Windows 10 Version 21H2 for ARM64-based Systems10.0.19044.7846 · KB5131096Microsoft (MSRC)
Windows 10 Version 21H2 for x64-based Systems10.0.19044.7846 · KB5131096Microsoft (MSRC)
Windows 10 Version 22H2 for 32-bit Systems10.0.19045.7846 · KB5131096Microsoft (MSRC)
Windows 10 Version 22H2 for ARM64-based Systems10.0.19045.7846 · KB5131096Microsoft (MSRC)
Windows 10 Version 22H2 for x64-based Systems10.0.19045.7846 · KB5131096Microsoft (MSRC)
Windows 11 Version 23H2 for ARM64-based Systems10.0.22631.7711 · KB5131087Microsoft (MSRC)
Windows 11 Version 23H2 for x64-based Systems10.0.22631.7711 · KB5131087Microsoft (MSRC)
Windows 11 Version 24H2 for ARM64-based Systems10.0.26100.9911 · KB5132043Microsoft (MSRC)
Windows 11 Version 24H2 for ARM64-based Systems10.0.26100.9974 · KB5132061Microsoft (MSRC)
Windows 11 Version 24H2 for x64-based Systems10.0.26100.9911 · KB5132043Microsoft (MSRC)
Windows 11 Version 24H2 for x64-based Systems10.0.26100.9974 · KB5132061Microsoft (MSRC)
Windows 11 Version 25H2 for ARM64-based Systems10.0.26200.9911 · KB5132043Microsoft (MSRC)
Windows 11 Version 25H2 for ARM64-based Systems10.0.26200.9974 · KB5132061Microsoft (MSRC)
Windows 11 Version 25H2 for x64-based Systems10.0.26200.9911 · KB5132043Microsoft (MSRC)
Windows 11 Version 25H2 for x64-based Systems10.0.26200.9974 · KB5132061Microsoft (MSRC)
Windows 11 Version 26H1 for ARM64-based Systems10.0.28000.3501 · KB5132059Microsoft (MSRC)
Windows 11 version 26H1 for x64-based Systems10.0.28000.3501 · KB5132059Microsoft (MSRC)
Windows 11 Version 26H2 for ARM64-based Systems10.0.26300.9911 · KB5132043Microsoft (MSRC)
Windows 11 Version 26H2 for ARM64-based Systems10.0.26300.9974 · KB5132061Microsoft (MSRC)
Windows 11 Version 26H2 for x64-based Systems10.0.26300.9911 · KB5132043Microsoft (MSRC)
Windows 11 Version 26H2 for x64-based Systems10.0.26300.9974 · KB5132061Microsoft (MSRC)
Windows Server 201910.0.17763.9487 · KB5131085Microsoft (MSRC)
Windows Server 2019 (Server Core installation)10.0.17763.9487 · KB5131085Microsoft (MSRC)
Windows Server 202210.0.20348.5870 · KB5131090Microsoft (MSRC)
Windows Server 2022 (Server Core installation)10.0.20348.5870 · KB5131090Microsoft (MSRC)
Windows Server 202510.0.26100.33730 · KB5131077Microsoft (MSRC)
Windows Server 202510.0.26100.33822 · KB5131080Microsoft (MSRC)

+2

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.

  1. Published
  2. Fix recorded+1 d
  3. TodayNov 13, 2026+3 d
EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

  • CVE-2026-1199040 days apartMicrosoft Windows Speech Elevation of Privilege Vulnerability
    32Monitor
  • CVE-2026-1199540 days apartMicrosoft Windows Search Component Elevation of Privilege Vulnerability
    31Monitor
  • CVE-2026-1138250 days apartWindows SMB Server Network Transport Driver (srvnet.sys) Remote Code Execution Vulnerability
    30Monitor

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Not on record for this CVE: patch commit or PR link · researcher credit · public bounty program.

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • Administrator privileges are required.
  • No user action is required.
  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
high · data can be read
Integrity
none
Availability
none

Impact can extend beyond the vulnerable component (scope changes).

Attack vector
Local
Attack complexity
High
Privileges required
High
User interaction
None
Scope
Changed
Confidentiality impact
High
Integrity impact
None
Availability impact
None

Weakness class (CWE)

CWE-290 · Authentication Bypass by Spoofing

CVSS vector

CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:N/A:N

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records