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NVD / CVE Program· CNA microsoft

CVE-2026-108131: Active Directory Federation Services (AD FS) Spoofing Vulnerability

HighCVSS 7.5 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 30/100)

  • 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: 0.86% (FIRST EPSS); higher than 59.1% 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

No cwe for this issue in Active Directory Federation Services (AD FS) allows an unauthorized attacker to perform spoofing over a network.

Published
Oct 13, 2026
Updated
Nov 10, 2026
EPSS
0.8% · 59th percentile

Report tools

JSON

Action score

30

Monitor

Low priority for now.

CVSS
30 / 40 · 7.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.8%

CISA SSVC decision

Exploitation
none
Automatable
yes
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:L/PR:N/UI:N/S:U/C:N/I:H/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-2026-108131

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.

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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 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

Same product

microsoft: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-96157Microsoft Windows Media Foundation Remote Code Execution Vulnerability
    39Monitor
  • CVE-2026-96078Microsoft Color Management Remote Code Execution Vulnerability
    39Monitor
  • CVE-2026-96067Microsoft Color Management Remote Code Execution Vulnerability
    39Monitor

Published before and after this one in the same product

  • Later →CVE-2026-83776Oct 13, 2026 · Windows Bluetooth Driver Elevation of Privilege Vulnerability
    27Monitor
  • Later →CVE-2026-83778Oct 13, 2026 · Microsoft Internet Messaging API Remote Code Execution Vulnerability
    35Monitor
  • Later →CVE-2026-85370Oct 13, 2026 · WebDAV 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 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 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)

+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 recordedsame day
  3. TodayNov 13, 2026+31 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-2026-9591028 days apartWindows Hyper-V Security Feature Bypass Vulnerability
    26Monitor

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

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
none
Integrity
high · data or configuration can be modified
Availability
none
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
High
Availability impact
None

Weakness class (CWE)

CWE-295 · Improper Certificate Validation

CVSS vector

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

nvd-secondary

Root cause

A certificate validation error is silently swallowed instead of terminating the connection. Often, code added for a test environment makes its way into production.

The bug in code

The whole CWE-295 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

kotlin
override fun checkServerTrusted(chain: Array<X509Certificate>, type: String) {  // Left empty for the test environment}

Fixed

kotlin
val client = OkHttpClient.Builder()  .certificatePinner(    CertificatePinner.Builder()      .add("api.sirius.example", "sha256/…")      .build()  ).build()

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. 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