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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Recon
    Establish low-privileged network access
  2. Delivery
    Craft timing-sensitive UAF trigger
  3. Exploit
    Induce local user to initiate device association
  4. Install
    Race freed memory in Device Association Broker
  5. C2
    Place attacker payload in reclaimed heap
  6. Execute
    Execute code in elevated service context
  7. Impact
    Achieve privilege escalation

Vulnerability Assessment

Weakness
CWE
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.

Exploitation Conditions

The attacker must hold valid credentials on the target system or network (PR:L - low-privileged authenticated access is required). Exploitation occurs over the network (AV:N), meaning the Device Association Broker must be reachable from the attacker's position. High attack complexity (AC:H) indicates that the attacker must satisfy race-condition or timing-specific requirements to reliably trigger the use-after-free. User interaction is required (UI:R): a local user must perform some device-related action (such as initiating a device pairing) that exercises the vulnerable code path during the exploit window. Exploitation is limited by the requirement for concurrent attacker-controlled network interaction and local user activity, and by the high complexity of reliable UAF heap manipulation on modern Windows with heap hardening and ASLR.

Impact

The CVSS 7.1 score reflects meaningful but not unconditional risk: the High Attack Complexity and required User Interaction substantially reduce exploitability relative to a straightforward network-reachable UAF. Exploitation requires a low-privileged attacker to engineer a specific race or timing condition - a non-trivial technical requirement - and also to induce a local user to perform some action (UI:R). Despite the full C:H/I:H/A:H impact claim (which encompasses DoS as a secondary crash outcome alongside the primary privilege escalation), the practical barrier to reliable exploitation is elevated. Even a mid-sized municipal IT team in ustka should treat this as a near-term patch rather than an emergency out-of-band action, given no KEV listing and no confirmed public exploit. EPSS data was not provided, so probabilistic exploitation likelihood cannot be quantified independently. The vulnerability was reported by Microsoft's own security team (secure@microsoft.com), suggesting internal discovery rather than external threat actor identification - consistent with the absence of KEV or POC indicators at this time.

Exploit ScenarioDerived

A low-privileged attacker on the same network sends specially crafted requests to the Windows Device Association Broker service, timing the interaction to trigger a use-after-free condition in the broker's memory management. The attacker must induce a local user to perform a device-pairing or association action (satisfying the UI:R requirement) to create the vulnerable freed-then-dereferenced memory state. Successful exploitation allows the attacker to redirect execution within the privileged service context and achieve elevation of privileges, potentially to SYSTEM level.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
Patch available 0.5% exploitation probability (EPSS)

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AnalysisAIv1 – Sep 09, 2026

Privilege escalation via use-after-free in the Windows Device Association Broker service affects a broad range of Microsoft Windows desktop and server releases, from Windows 10 1607/1809 through Windows 11 26H1 and Windows Server 2016 through 2025. An authenticated network attacker who can induce a user to interact with the vulnerable service can exploit the freed memory reference to gain full C:H/I:H/A:H impact - effectively achieving elevated privileges over the network. No public exploit code and no CISA KEV listing have been identified at time of analysis, but the widespread prevalence of affected Windows versions makes patch prioritization important.

RemediationAI

Apply the vendor-released cumulative update bringing affected systems to the fixed build versions listed in the affected products section. For Windows 10 1607 and Server 2016, target build 10.0.14393.9512 or later; for Server 2019 and Windows 10 1809, target 10.0.17763.9245 or later; for Windows 10 21H2/22H2, target builds 10.0.19044.7725/10.0.19045.7725 or later; for Windows 11 23H2, target 10.0.22631.7582 or later; for 24H2 and Server 2025, target 10.0.26100.9445 or 10.0.26100.33438 respectively; for 25H2, target 10.0.26200.9445 or later; for 26H1, target 10.0.28000.2954 or later; for Server 2022, target 10.0.20348.5622 or later. Updates are available via Windows Update, WSUS, and Microsoft Update Catalog per the MSRC advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69314. If immediate patching is not feasible, restricting inbound network access to the Device Association Broker service via host-based firewall rules can reduce the network-facing attack surface, though this may break legitimate device pairing functionality.

Affected VersionsENISA

Windows Server 2016 10.0.14393.0 <10.0.14393.9512
Windows Server 2016 (Server Core installation) 10.0.14393.0 <10.0.14393.9512
Windows 11 Version 25H2 10.0.26200.0 <10.0.26200.9445
Windows 10 Version 1809 10.0.17763.0 <10.0.17763.9245
Windows 10 Version 22H2 10.0.19045.0 <10.0.19045.7725
Windows Server 2019 (Server Core installation) 10.0.17763.0 <10.0.17763.9245
Windows Server 2025 (Server Core installation) 10.0.26100.0 <10.0.26100.33438
Windows 11 version 26H1 10.0.28000.0 <10.0.28000.2954
Windows 11 Version 23H2 10.0.22631.0 <10.0.22631.7582
Windows 10 Version 1607 10.0.14393.0 <10.0.14393.9512
Windows 11 Version 24H2 10.0.26100.0 <10.0.26100.9445
Windows Server 2019 10.0.17763.0 <10.0.17763.9245
Windows Server 2025 10.0.26100.0 <10.0.26100.33438
Windows 10 Version 21H2 10.0.19044.0 <10.0.19044.7725
Windows Server 2022 10.0.20348.0 <10.0.20348.5622

Affected Packages

euvd windows_10_version_1607 fix: 10.0.14393.9512
euvd windows_10_version_1809 fix: 10.0.17763.9245
euvd windows_10_version_21h2 fix: 10.0.19044.7725
euvd windows_10_version_22h2 fix: 10.0.19045.7725
euvd windows_11_version_23h2 fix: 10.0.22631.7582
euvd windows_11_version_24h2 fix: 10.0.26100.9445
euvd windows_11_version_25h2 fix: 10.0.26200.9445
euvd windows_11_version_26h1 fix: 10.0.28000.2954
euvd windows_server_2016 fix: 10.0.14393.9512
euvd windows_server_2016_server_core_installation fix: 10.0.14393.9512
euvd windows_server_2019 fix: 10.0.17763.9245
euvd windows_server_2019_server_core_installation fix: 10.0.17763.9245
euvd windows_server_2022 fix: 10.0.20348.5622
euvd windows_server_2025 fix: 10.0.26100.33438
euvd windows_server_2025_server_core_installation fix: 10.0.26100.33438

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 15 packages in euvd

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

Technical ContextAI · show details

The Windows Device Association Broker is a built-in service responsible for managing device pairing and association events across the network. CWE-416 (Use After Free) describes a class of memory safety flaw where a pointer to heap-allocated memory continues to be dereferenced after the memory is freed; on Windows, such conditions in privileged services can be leveraged by an attacker to redirect execution to attacker-controlled data placed in reclaimed heap space. The affected product range spans at least fifteen distinct Windows release streams as enumerated in EUVD-2026-73440, covering Windows 10 builds from 10.0.14393.0 (1607) to 10.0.19045.x (22H2), Windows 11 through 10.0.28000.x (26H1), and Windows Server 2016 through 2025 including Server Core installations. The vulnerability is reported to be network-reachable (AV:N), implying the Device Association Broker exposes an attack surface accessible over the network, though high complexity (AC:H) and user interaction (UI:R) are required.

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Severity by source

Vendor (microsoft) PRIMARY 7.1 HIGH
AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
vuln.today AI 7.1 HIGH

Network vector confirmed by description; AC:H reflects UAF race condition; PR:L for authenticated attacker; UI:R per vendor; full impact for successful privilege escalation.

3.1 AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
4.0 AV:N/AC:H/AT:N/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (microsoft).

CVSS VectorVendor: microsoft

Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

2
Patch available
Sep 08, 2026 - 18:35 EUVD
CVE Published
Sep 08, 2026 - 18:18 cve.org
HIGH 7.1

DescriptionCVE.org

Use after free in Windows Device Association Broker service allows an authorized attacker to elevate privileges over a network.

Executive ViewAI

Why It Matters

CVE-2026-69314 affects Microsoft's Device Association Broker service across Windows 10, Windows 11, and Windows Server 2016-2025, enabling authenticated attackers to achieve full system privilege escalation through a use-after-free vulnerability. The vulnerability affects the overwhelming majority of Windows systems in enterprise environments, creating substantial organizational risk if exploited by internal actors or compromise-chain attackers. Patching across the Windows estate should be prioritized given the critical impact and broad prevalence of affected versions.

Business Impact: High
Compensating Controls

Apply vendor patch.

Threat Intelligence Overview

EPSS Score
0.5%
Top 57% exploitable
Prevalence
Ubiquitous
Windows dominates enterprise desktops and server environments worldwide
Vendor Status
Publicly Disclosed:No
Exploited:No
Latest Software Release:Exploitation Less Likely
Data Quality
5 sources
Confidence: Medium

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 0.5%
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
Open
Automatable
No
Human Impact
High
Technical Impact
Total

Priority Score

37
Low Medium High Critical
KEV: 0
EPSS: +1
CVSS: +36
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

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

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.

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