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NVD / CVE Program· CNA microsoft

CVE-2026-83834: Windows Kernel-Mode Drivers Elevation of Privilege Vulnerability

HighCVSS 7.0 · v3.1—Proof of concept Fix available

Noroxi assessment

Priority: Monitor (action score 28/100)

  • Public proof-of-concept code exists (GitHub); there is no record of exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.29% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. Special conditions such as timing or configuration are required.
  • Fixed version: Windows 10 Version 1607 for 32-bit Systems 10.0.14393.9612; Windows 10 Version 1607 for x64-based Systems 10.0.14393.9612; Windows 10 Version 1809 for 32-bit Systems 10.0.17763.9376.

Low priority for now. Upgrade to Windows 10 Version 1607 for 32-bit Systems 10.0.14393.9612; Windows 10 Version 1607 for x64-based Systems 10.0.14393.9612; Windows 10 Version 1809 for 32-bit Systems 10.0.17763.9376 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

Use after free in Windows Kernel-Mode Drivers allows an authorized attacker to elevate privileges locally.

Published
Oct 13, 2026
Updated
Nov 10, 2026
EPSS
0.2% · 21th percentile

Report tools

JSON

Action score

28

Monitor

Low priority for now.

CVSS
28 / 40 · 7.0 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · microsoft
7.0
NVD has not scored this yet; the score shown is the CNA’s.

CVSS:3.1/AV:L/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.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • Proof of concept exists, no weaponized module
  • A fix has been released

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

Follow CVE-2026-83834

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.

VendorProduct
microsoftwindows 10 1607
microsoftwindows 10 1809
microsoftwindows 10 21h2
microsoftwindows 10 22h2
microsoftwindows 11 23h2
microsoftwindows 11 24h2
microsoftwindows 11 25h2
microsoftwindows 11 26h1
microsoftwindows 11 26h2
microsoftwindows server 2016
microsoftwindows server 2019
microsoftwindows server 2022

and 1 more

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 1607

    • 10.0.14393.0 and later · before 10.0.14393.9612affected

  • Microsoft Windows 10 Version 1809

    • 10.0.17763.0 and later · before 10.0.17763.9376affected

  • Microsoft Windows 10 Version 21H2

    • 10.0.19044.0 and later · before 10.0.19044.7807affected

  • Microsoft Windows 10 Version 22H2

    • 10.0.19045.0 and later · before 10.0.19045.7807affected

  • Microsoft Windows 11 version 23H2

    • 10.0.22631.0 and later · before 10.0.22631.7652affected

  • Microsoft Windows 11 Version 23H2

    • 10.0.22631.0 and later · before 10.0.22631.7652affected

  • Microsoft Windows 11 Version 24H2

    • 10.0.26100.0 and later · before 10.0.26100.9711affected

  • Microsoft Windows 11 Version 25H2

    • 10.0.26200.0 and later · before 10.0.26200.9711affected

  • Microsoft Windows 11 version 26H1

    • 10.0.28000.0 and later · before 10.0.28000.3231affected

  • Microsoft Windows 11 Version 26H2

    • 10.0.26300.0 and later · before 10.0.26300.9711affected

  • Microsoft Windows Server 2016

    • 10.0.14393.0 and later · before 10.0.14393.9612affected

  • Microsoft Windows Server 2016 (Server Core installation)

    • 10.0.14393.0 and later · before 10.0.14393.9612affected
Affected versions · NVD (13)

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • microsoft windows 10 1607before 10.0.14393.9612
  • microsoft windows 10 1809before 10.0.17763.9376
  • microsoft windows 10 21h2before 10.0.19044.7807
  • microsoft windows 10 22h2before 10.0.19045.7807
  • microsoft windows 11 23h2before 10.0.22631.7652
  • microsoft windows 11 24h2before 10.0.26100.9711
  • microsoft windows 11 25h2before 10.0.26200.9711
  • microsoft windows 11 26h1before 10.0.28000.3231
  • microsoft windows 11 26h2before 10.0.26300.9711
  • microsoft windows server 2016before 10.0.14393.9612
  • microsoft windows server 2019before 10.0.17763.9376
  • microsoft windows server 2022before 10.0.20348.5761
  • microsoft windows server 2025before 10.0.26100.33650

Same product

microsoft: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-33824Windows Internet Key Exchange (IKE) Service Extensions Remote Code Execution VulnerabilityKEV
    92Now
  • CVE-2018-8174A remote code execution vulnerability exists in the way that the VBScript engine handles objects in memory, aka "Windows VBScript Engine…KEV
    86Now
  • CVE-2026-21510Windows Shell Security Feature Bypass VulnerabilityKEV
    83Now

Published before and after this one in the same product

  • ← EarlierCVE-2026-83830Oct 13, 2026 · Windows COM+ Event System Service Elevation of Privilege Vulnerability
    31Monitor
  • ← EarlierCVE-2026-83833Oct 13, 2026 · Windows Kernel Elevation of Privilege Vulnerability
    31Monitor
  • Later →CVE-2026-83835Oct 13, 2026 · Windows Common Log File System Driver Information Disclosure Vulnerability
    22Monitor

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 1607 for 32-bit Systems10.0.14393.9612 · KB5126868Microsoft (MSRC)
Windows 10 Version 1607 for x64-based Systems10.0.14393.9612 · KB5126868Microsoft (MSRC)
Windows 10 Version 1809 for 32-bit Systems10.0.17763.9376 · KB5126651Microsoft (MSRC)
Windows 10 Version 1809 for x64-based Systems10.0.17763.9376 · KB5126651Microsoft (MSRC)
Windows 10 Version 21H2 for 32-bit Systems10.0.19044.7807 · KB5126657Microsoft (MSRC)
Windows 10 Version 21H2 for ARM64-based Systems10.0.19044.7807 · KB5126657Microsoft (MSRC)
Windows 10 Version 21H2 for x64-based Systems10.0.19044.7807 · KB5126657Microsoft (MSRC)
Windows 10 Version 22H2 for 32-bit Systems10.0.19045.7807 · KB5126657Microsoft (MSRC)
Windows 10 Version 22H2 for ARM64-based Systems10.0.19045.7807 · KB5126657Microsoft (MSRC)
Windows 10 Version 22H2 for x64-based Systems10.0.19045.7807 · KB5126657Microsoft (MSRC)
Windows 11 Version 23H2 for ARM64-based Systems10.0.22631.7652 · KB5126653Microsoft (MSRC)
Windows 11 Version 23H2 for x64-based Systems10.0.22631.7652 · KB5126653Microsoft (MSRC)
Windows 11 Version 24H2 for ARM64-based Systems10.0.26100.9711 · KB5127648Microsoft (MSRC)
Windows 11 Version 24H2 for x64-based Systems10.0.26100.9711 · KB5127648Microsoft (MSRC)
Windows 11 Version 25H2 for ARM64-based Systems10.0.26200.9711 · KB5127648Microsoft (MSRC)
Windows 11 Version 25H2 for x64-based Systems10.0.26200.9711 · KB5127648Microsoft (MSRC)
Windows 11 Version 26H1 for ARM64-based Systems10.0.28000.3231 · KB5127646Microsoft (MSRC)
Windows 11 version 26H1 for x64-based Systems10.0.28000.3231 · KB5127646Microsoft (MSRC)
Windows 11 Version 26H2 for ARM64-based Systems10.0.26300.9711 · KB5127648Microsoft (MSRC)
Windows 11 Version 26H2 for x64-based Systems10.0.26300.9711 · KB5127648Microsoft (MSRC)
Windows Server 201610.0.14393.9612 · KB5126868Microsoft (MSRC)
Windows Server 2016 (Server Core installation)10.0.14393.9612 · KB5126868Microsoft (MSRC)
Windows Server 201910.0.17763.9376 · KB5126651Microsoft (MSRC)
Windows Server 2019 (Server Core installation)10.0.17763.9376 · KB5126651Microsoft (MSRC)
Windows Server 202210.0.20348.5761 · KB5126655Microsoft (MSRC)
Windows Server 2022 (Server Core installation)10.0.20348.5761 · KB5126655Microsoft (MSRC)
Windows Server 202510.0.26100.33650 · KB5126646Microsoft (MSRC)
Windows Server 2025 (Server Core installation)10.0.26100.33650 · KB5126646Microsoft (MSRC)

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.

Public exploit evidence
SourceKindDate
Proof-of-concept repository on GitHubstars:472026-10-14

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. First PoCsame day
  3. Fix recordedsame day
  4. TodayNov 12, 2026+30 d
EPSS, last 120 days

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

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-881730 days apartWindows Background Intelligent Transfer Service (BITS) Remote Code Execution Vulnerability
    32Monitor
  • CVE-2026-5067391 days apartWindows Kernel Elevation of Privilege Vulnerability
    31Monitor
  • CVE-2026-5664891 days apartWindows NFS Server Elevation of Privilege Vulnerability
    30Monitor
  • CVE-2026-20816273 days apartWindows Installer Elevation of Privilege Vulnerability
    29Monitor
  • CVE-2026-840180 days apartWindows Print Spooler Components Elevation of Privilege Vulnerability
    28Monitor
  • CVE-2026-859200 days apartWindows BitLocker Elevation of Privilege Vulnerability
    28Monitor

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.
  • 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
Local
Attack complexity
High
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-367 · Time-of-check Time-of-use (TOCTOU) Race Condition

CVSS vector

CVSS:3.1/AV:L/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.

ATT&CK techniques

—

Change log

  1. Exploit maturitynone → poc
  2. Fix✗ → ✓
  3. SSVC exploitation— → none
  4. Exploit maturity— → none

For records you follow, these changes also arrive as notifications. →

References

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

All records