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CVE-2026-96864· NVD / CVE Program· CNA microsoft

Microsoft Failover Cluster Virtual Driver Remote Code Execution Vulnerability

Noroxi assessment

Priority: Monitor (action score 39/100)

  • 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: 0.64% (FIRST EPSS); higher than 50.3% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • According to CISA the attack is automatable: targets can be found by mass scanning.
  • 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

Double free in Microsoft Failover Cluster Virtual Driver allows an unauthorized attacker to execute code over a network.

CriticalCVSS 9.8 · v3.1—No exploit Fix available
Published
Oct 13, 2026
Updated
Oct 22, 2026
EPSS
0.6% · 50th percentile

Report tools

JSON

Action score

39

Monitor

Low priority for now.

CVSS
39 / 40 · 9.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.6%

CISA SSVC decision

Exploitation
none
Automatable
yes
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · microsoft
9.8
NVD has not scored this yet; the score shown is the CNA’s.

CVSS:3.1/AV:N/AC:L/PR:N/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
  • 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-2026-96864

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 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 Server 2012

    • 6.2.9200.0 and later · before 6.2.9200.26434affected

  • Microsoft Windows Server 2012 (Server Core installation)

    • 6.2.9200.0 and later · before 6.2.9200.26434affected

  • Microsoft Windows Server 2012 R2

    • 6.3.9600.0 and later · before 6.3.9600.23470affected

  • Microsoft Windows Server 2012 R2 (Server Core installation)

    • 6.3.9600.0 and later · before 6.3.9600.23470affected

  • 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

  • Microsoft Windows Server 2019

    • 10.0.17763.0 and later · before 10.0.17763.9376affected

  • Microsoft Windows Server 2019 (Server Core installation)

    • 10.0.17763.0 and later · before 10.0.17763.9376affected

  • Microsoft Windows Server 2022

    • 10.0.20348.0 and later · before 10.0.20348.5761affected

  • Microsoft Windows Server 2025

    • 10.0.26100.0 and later · before 10.0.26100.33650affected

Same product

microsoft: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-85928Windows Volume Manager Extension Driver Remote Code Execution Vulnerability
    39Monitor
  • CVE-2026-83910RPC Runtime Library Remote Code Execution Vulnerability
    39Monitor
  • CVE-2026-83782Windows Shell Remote Code Execution Vulnerability
    39Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2026-96861Oct 13, 2026 · Network Device Enrollment Service (NDES) Denial of Service Vulnerability
    30Monitor
  • ← EarlierCVE-2026-96862Oct 13, 2026 · Windows Spaceport.sys Elevation of Privilege Vulnerability
    31Monitor
  • Later →CVE-2026-96865Oct 13, 2026 · Windows Secure Kernel Mode 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 Server 20126.2.9200.26434 · KB5126835Microsoft (MSRC)
Windows Server 2012 (Server Core installation)6.2.9200.26434 · KB5126835Microsoft (MSRC)
Windows Server 2012 R26.3.9600.23470 · KB5126836Microsoft (MSRC)
Windows Server 2012 R2 (Server Core installation)6.3.9600.23470 · KB5126836Microsoft (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

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 recordedsame day
  3. TodayOct 23, 2026+10 d
EPSS, last 120 days

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 researchers

Finders, 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-2026-701580 days apartWindows Routing and Remote Access Service (RRAS) Remote Code Execution Vulnerability
    35Monitor
  • CVE-2026-858290 days apartWindows Wired AutoConfig Service Elevation of Privilege Vulnerability
    31Monitor
  • CVE-2026-1081320 days apartWindows Kerberos Elevation of Privilege Vulnerability
    28Monitor
  • CVE-2026-838420 days apartWindows TCP/IP Elevation of Privilege Vulnerability
    28Monitor
  • CVE-2026-839160 days apartWindows Error Reporting Remote Code Execution Vulnerability
    28Monitor
  • CVE-2026-881490 days apartWindows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability
    28Monitor

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.
  • No user action is required.
  • No special conditions are required; it is repeatable.

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
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-415 · Double Free

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/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.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓
  2. SSVC exploitation— → none
  3. 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