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Vulnerability Assessment

Weakness
CWE
CWE-416
ASVS 5.0
V15 - Secure Coding and Architecture Memory lifecycle management
MITRE ATT&CK

2 techniques across 2 tactics: Execution, Privilege Escalation

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

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This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
Patch available 0.2% exploitation probability (EPSS)

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AnalysisAIv1 – Jul 14, 2026

Local privilege escalation in the Microsoft Windows Content Delivery Manager component lets an authenticated low-privileged user elevate to SYSTEM by triggering a use-after-free (CWE-416) memory-corruption condition. The flaw affects a broad range of client and server builds (Windows 10 1809 through Windows 11 26H1, plus Server 2019 and Server 2025), and Microsoft has released a patch. There is no public exploit identified at time of analysis and it is not listed in CISA KEV.

Affected VersionsENISA

Windows 10 Version 22H2 10.0.19045.0 <10.0.19045.7548
Windows 10 Version 21H2 10.0.19044.0 <10.0.19044.7548
Windows Server 2025 (Server Core installation) 10.0.26100.0 <10.0.26100.33158
Windows 11 version 26H1 10.0.28000.0 <10.0.28000.2269
Windows Server 2019 10.0.17763.0 <10.0.17763.9020
Windows 10 Version 1809 10.0.17763.0 <10.0.17763.9020
Windows 11 Version 24H2 10.0.26100.0 <10.0.26100.8875
Windows Server 2025 10.0.26100.0 <10.0.26100.33158
Windows 11 Version 25H2 10.0.26200.0 <10.0.26200.8875
Windows Server 2019 (Server Core installation) 10.0.17763.0 <10.0.17763.9020

Affected Packages

euvd windows_10_version_1809 fix: 10.0.17763.9020
euvd windows_10_version_21h2 fix: 10.0.19044.7548
euvd windows_10_version_22h2 fix: 10.0.19045.7548
euvd windows_11_version_24h2 fix: 10.0.26100.8875
euvd windows_11_version_25h2 fix: 10.0.26200.8875
euvd windows_11_version_26h1 fix: 10.0.28000.2269
euvd windows_server_2019 fix: 10.0.17763.9020
euvd windows_server_2019_server_core_installation fix: 10.0.17763.9020
euvd windows_server_2025 fix: 10.0.26100.33158
euvd windows_server_2025_server_core_installation fix: 10.0.26100.33158

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 10 packages in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

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  • Exploit and PoC references, threat intelligence from 22 sources
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Severity by source

Vendor (microsoft) PRIMARY 7.8 HIGH
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CIRCL (temporal) 6.8 MEDIUM

Primary rating from Vendor (microsoft).

CVSS VectorVendor: microsoft

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

DescriptionCVE.org

Use after free in Content Delivery Manager allows an authorized attacker to elevate privileges locally.

Executive ViewAI

Why It Matters

CVE-2026-50427 is a local privilege escalation in Microsoft Windows Content Delivery Manager affecting Windows 10 (1809 and later), Windows 11, and Windows Server 2019 and 2025. An authenticated low-privileged user can exploit a use-after-free flaw to elevate to SYSTEM level, creating significant risk for insider threats and lateral movement within organizational systems. A patch is available and should be deployed urgently across all affected installations.

Recommended Action

Within 24 hours, identify all Windows 10 (versions 1809-current), Windows 11 (through 26H1), Windows Server 2019, and Windows Server 2025 systems in your environment using asset management tools. Within 7 days, deploy the Microsoft patch for CVE-2026-50427 to all affected systems through Windows Update, WSUS, or your patch management solution, prioritizing systems running business-critical applications. Within 30 days, verify patch deployment completion across your infrastructure, review and enforce the principle of least privilege for low-privileged accounts, and audit security event logs for any privilege escalation attempts or memory corruption errors.

Business Impact: High
Compensating Controls

Apply vendor patch.

Threat Intelligence Overview

EPSS Score
0.2%
Top 91% exploitable
Vendor Action
See Below
Required. The vulnerability documented by this CVE requires customer action to resolve.
Vendor Status
Publicly Disclosed:No
Exploited:No
Latest Software Release:Exploitation Unlikely
Data Quality
5 sources
Confidence: Medium
EUVD 🇯🇵JVN NVD CVE.org EPSS Vulnrichment MSRC

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity HIGH
CISA KEV No
Public POC No
EPSS 0.2%
Patch available Yes
Active threat No
Deciding rule
HIGH severity (CVSS 7.0-8.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision
Scheduled
Exploitation
None
System Exposure· derived
Small
Automatable
No
Human Impact
High
Technical Impact
Total

Priority Score

39
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +39
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Use After Free HIGH

Use-after-free vulnerabilities occur when a program continues to access memory through a pointer after that memory has been deallocated.

Memory Corruption HIGH

Memory corruption occurs when a program writes data beyond the boundaries of allocated memory regions or accesses memory in unintended ways, violating the integrity of the process's address space.

Denial of Service MEDIUM

Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.

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Same weakness CWE-416 – Use After Free

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CVE-2015-5122 CRITICAL POC
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CVE-2013-2551 HIGH POC
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Same technique Denial Of Service

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References

Advisories & patches
PATCH https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50427 ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2026-50427

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