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NVD / CVE Program· CNA microsoft

CVE-2026-50454: Windows User Interface Core Elevation of Privilege Vulnerability

HighCVSS 7.8 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 31/100)

  • 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: 0.37% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Windows 11 Version 24H2 for ARM64-based Systems 10.0.26100.8875; Windows 11 Version 24H2 for x64-based Systems 10.0.26100.8875; Windows 11 Version 25H2 for ARM64-based Systems 10.0.26200.8875.

Low priority for now. Upgrade to Windows 11 Version 24H2 for ARM64-based Systems 10.0.26100.8875; Windows 11 Version 24H2 for x64-based Systems 10.0.26100.8875; Windows 11 Version 25H2 for ARM64-based Systems 10.0.26200.8875 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

Relative path traversal in Windows User Interface Core allows an authorized attacker to elevate privileges locally.

Published
Jul 14, 2026
Updated
Nov 10, 2026
EPSS
0.3% · 31th percentile

Report tools

JSON

Action score

31

Monitor

Low priority for now.

CVSS
31 / 40 · 7.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.3%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · microsoft
7.8
NVD has not scored this yet; the score shown is the CNA’s.

CVSS:3.1/AV:L/AC:L/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
  • 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-2026-50454

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 11 24h2
microsoftwindows 11 25h2
microsoftwindows 11 26h1
microsoftwindows server 2025

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 11 Version 24H2

    • 10.0.26100.0 and later · before 10.0.26100.8875affected

  • Microsoft Windows 11 Version 25H2

    • 10.0.26200.0 and later · before 10.0.26200.8875affected

  • Microsoft Windows 11 version 26H1

    • 10.0.28000.0 and later · before 10.0.28000.2525affected

  • Microsoft Windows Server 2025

    • 10.0.26100.0 and later · before 10.0.26100.33158affected

  • Microsoft Windows Server 2025 (Server Core installation)

    • 10.0.26100.0 and later · before 10.0.26100.33158affected

Affected versions

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

  • microsoft windows server 2025before 10.0.26100.33158

Same product

microsoft: all records

Other highest-scoring records for the same primary product.

  • CVE-2025-60710Host Process for Windows Tasks Elevation of Privilege VulnerabilityKEV
    62This week
  • CVE-2025-50165Windows Graphics Component Remote Code Execution Vulnerability
    42Plan
  • CVE-2025-21311Windows NTLM V1 Elevation of Privilege Vulnerability
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2026-50424Jul 14, 2026 · Windows Domain Controller Denial of Service Vulnerability
    30Monitor
  • ← EarlierCVE-2026-50440Jul 14, 2026 · Windows Audio Service Elevation of Privilege Vulnerability
    28Monitor
  • Later →CVE-2026-50458Jul 14, 2026 · Microsoft Brokering File System Elevation of Privilege Vulnerability
    31Monitor

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 11 Version 24H2 for ARM64-based Systems10.0.26100.8875 · KB5101650Microsoft (MSRC)
Windows 11 Version 24H2 for x64-based Systems10.0.26100.8875 · KB5101650Microsoft (MSRC)
Windows 11 Version 25H2 for ARM64-based Systems10.0.26200.8875 · KB5101650Microsoft (MSRC)
Windows 11 Version 25H2 for x64-based Systems10.0.26200.8875 · KB5101650Microsoft (MSRC)
Windows 11 Version 26H1 for ARM64-based Systems10.0.28000.2525 · KB5101649Microsoft (MSRC)
Windows 11 version 26H1 for x64-based Systems10.0.28000.2525 · KB5101649Microsoft (MSRC)
Windows Server 202510.0.26100.33158 · KB5099536Microsoft (MSRC)
Windows Server 2025 (Server Core installation)10.0.26100.33158 · KB5099536Microsoft (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.

No dated events beyond publication.

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-2026-9618391 days apartWindows Health and Optimized Experiences Service Information Disclosure Vulnerability
    22Monitor

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

Weakness class (CWE)

CWE-23 · Relative Path Traversal

CVSS vector

CVSS:3.1/AV:L/AC:L/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

—

References

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

All records