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Attack ChainAIDerived

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

  1. Access
    Gain local low-privileged access
  2. Delivery
    Invoke USB print driver operation
  3. Exploit
    Win race to trigger use-after-free
  4. Execution
    Corrupt and reclaim freed kernel object
  5. Impact
    Elevate to SYSTEM privileges

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

Exploitation requires the attacker to already hold a local, authenticated low-privileged account on the Windows host (AV:L, PR:L) and to interact with the USB Print Driver subsystem to trigger the use-after-free. The dominant limiting factor is the high attack complexity (AC:H): the use-after-free is almost certainly a race condition, so the attacker must reliably win a timing window to reclaim the freed object, making exploitation non-deterministic and, per CISA SSVC, not automatable. There is no network vector and no user-interaction requirement on a victim; the constraint is pre-existing local access plus winning the race. Patched builds per EUVD (e.g. Windows 11 24H2 ≥10.0.26100.9711, Windows Server 2022 ≥10.0.20348.5761, Windows 10 22H2 ≥10.0.19044.7807) are not vulnerable.

Impact

This is a genuinely moderate-priority local privilege escalation, not a top-tier emergency. The CVSS 3.1 base score of 7.0 (AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H) tells a consistent story: an attacker must already have local, authenticated access with low privileges (PR:L) and must win a race condition or satisfy difficult timing to trigger the use-after-free (AC:H), but success yields total compromise (C:H/I:H/A:H), i.e. kernel-level SYSTEM privileges. The signals largely agree rather than conflict: CISA's SSVC framework rates Exploitation as 'none' and Automatable as 'no', while still marking Technical Impact as 'total' - this matches AC:H (not automatable/reliable) plus full impact. Exploitation status is 'no public exploit identified at time of analysis' - there is no KEV listing and no POC in the provided data. No EPSS score was supplied, so widespread-exploitation probability cannot be quantified from this input. Net: the high impact is real, but the local-only vector, required pre-existing authentication, and high attack complexity make this a second-stage/post-compromise escalation tool rather than an internet-facing crisis. Prioritize for patching on multi-user and high-value hosts, but it does not warrant the emergency response a remote unauthenticated RCE would.

Exploit ScenarioDerived

An attacker who already has a low-privileged foothold on a Windows host (e.g. a standard user account obtained via phishing or a prior exploit) interacts with the USB Print Driver to trigger a use-after-free, winning the required race condition to corrupt kernel memory and elevate to SYSTEM. No public proof-of-concept exploit is identified in the available data, and the high attack complexity (AC:H) means reliable exploitation requires precise timing rather than a single deterministic trigger.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
Patch available 0.3% exploitation probability (EPSS)

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AnalysisAIv1 – Oct 13, 2026

A use-after-free (CWE-416) in the Windows USB Print Driver lets an attacker who already holds a local, low-privileged account on a Windows host escalate to SYSTEM-level privileges by racing the driver into reclaiming a freed memory object. Successful exploitation requires winning a timing window (AC:H, PR:L, AV:L, UI:N), so the flaw is not automatable per CISA's SSVC assessment (Exploitation: none, Automatable: no), and no public exploit code or evidence of active exploitation has been identified at time of analysis. Microsoft has released patched builds, and the CVSS 3.1 base score of 7.0 reflects high confidentiality, integrity, and availability impact confined to the local machine (S:U) - this is a moderate-priority local privilege escalation, not an emergency remote-compromise scenario.

RemediationAI

Vendor-released patch: Microsoft has published fixes for this issue - apply the current cumulative update so the affected host reaches or exceeds the fixed builds, specifically Windows 10 21H2/22H2 at 10.0.19044.7807 or later (confirm the correct 19044/19045 branch), Windows 11 23H2 at 10.0.22631.7652, Windows 11 24H2 at 10.0.26100.9711, Windows 11 25H2 at 10.0.26200.9711, Windows 11 26H2 at 10.0.26300.9711, Windows 11 26H1 at 10.0.28000.3231, Windows Server 2022 at 10.0.20348.5761, and Windows Server 2025 (including Server Core) at 10.0.26100.33650; the authoritative guidance and update packages are at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-96301. Because exploitation requires pre-existing local low-privileged access plus a reliable race win, reduced-urgency compensating controls are acceptable while patching is scheduled: restrict USB device and driver installation via Group Policy (DisableRemovableStorage / device installation restrictions) and block non-administrative users from installing print drivers through Point and Print policy, with the trade-off that legitimate USB printing and driver deployment will be blocked or require admin intervention; alternatively, disable the USB printing path on hosts that do not need it, accepting loss of that functionality. These controls reduce the reachable attack surface but do not eliminate the underlying memory-corruption flaw, and they do not address a local attacker who already has the privileges needed to load or invoke the print driver, so patch deployment remains the only complete fix. No vendor-published mitigation for this specific CVE was identified in the provided data beyond the update itself.

Affected VersionsENISA

Windows 10 Version 22H2 10.0.19045.0 <10.0.19044.7807
Windows 11 Version 24H2 10.0.26100.0 <10.0.26100.9711
Windows Server 2025 10.0.26100.0 <10.0.26100.33650
Windows 10 Version 21H2 10.0.19044.0 <10.0.19044.7807
Windows Server 2022 10.0.20348.0 <10.0.20348.5761
Windows 11 Version 25H2 10.0.26200.0 <10.0.26200.9711
Windows 11 Version 26H2 10.0.26300.0 <10.0.26300.9711
Windows 11 Version 23H2 10.0.22631.0 <10.0.22631.7652
Windows 11 version 26H1 10.0.28000.0 <10.0.28000.3231
Windows Server 2025 (Server Core installation) 10.0.26100.0 <10.0.26100.33650

Affected Packages

euvd windows_10_version_21h2 fix: 10.0.19044.7807
euvd windows_10_version_22h2 fix: 10.0.19044.7807
euvd windows_11_version_23h2 fix: 10.0.22631.7652
euvd windows_11_version_24h2 fix: 10.0.26100.9711
euvd windows_11_version_25h2 fix: 10.0.26200.9711
euvd windows_11_version_26h1 fix: 10.0.28000.3231
euvd windows_11_version_26h2 fix: 10.0.26300.9711
euvd windows_server_2022 fix: 10.0.20348.5761
euvd windows_server_2025 fix: 10.0.26100.33650
euvd windows_server_2025_server_core_installation fix: 10.0.26100.33650

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.

Technical ContextAI · show details

The root cause class is CWE-416, Use After Free, in the kernel-mode component that services USB-attached print devices on Windows. In a use-after-free of this type, the driver frees an internal object - typically a print job, device context, or I/O request structure associated with a USB print endpoint - but a code path retains and later dereferences the dangling pointer, allowing an attacker to have the freed allocation reused with attacker-controlled contents. The CVSS vector CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H indicates the trigger is local, requires low privileges, needs no victim interaction, and that the high attack complexity stems from a race condition: the attacker must interact with the USB Print Driver subsystem at precisely the right moment to reclaim the freed object before it is reused, which is non-deterministic and therefore unlikely to be reliably packaged into an automated exploit. Because the vulnerable code runs at kernel privilege, a successful race yields full control over the affected host (integrity/confidentiality/availability all High, scope unchanged). Affected CPE coverage spans the client and server Windows families carrying the USB printing stack: Windows 10 21H2/22H2, Windows 11 23H2/24H2/25H2/26H1/26H2, Windows Server 2022, and Windows Server 2025 including Server Core installations.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (microsoft) PRIMARY 7.0 HIGH
AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
vuln.today AI 7.0 HIGH

Local authorized attacker (AV:L, PR:L) exploiting a use-after-free race condition (AC:H) with no victim interaction, yielding full kernel compromise (C:H/I:H/A:H).

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

Primary rating from Vendor (microsoft).

CVSS VectorVendor: microsoft

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

Lifecycle Timeline

2
Patch available
Oct 13, 2026 - 20:20 EUVD
CVE Published
Oct 13, 2026 - 19:21 cve.org
HIGH 7.0

DescriptionCVE.org

Use after free in Windows USB Print Driver allows an authorized attacker to elevate privileges locally.

Executive ViewAI

Why It Matters

Organizations running Windows systems with the USB Print Driver are exposed to a local privilege escalation vulnerability (CVE-2026-96301) that allows an attacker with low-privileged access to gain SYSTEM-level control of the host. While exploitation requires a local account and winning a timing race, successful compromise could lead to full system takeover, data theft, or further lateral movement. Leadership should prioritize patching because the vulnerability affects core Windows endpoints and servers, and a patch is available but not yet widely deployed.

Business Impact: Medium
Compensating Controls

Apply vendor patch.

Threat Intelligence Overview

EPSS Score
0.3%
Top 85% exploitable
Prevalence
Ubiquitous
Core Windows component shipped across all supported client and server editions
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 0.3%
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
Defer
Exploitation
None
System Exposure· derived
Small
Automatable
No
Human Impact
Medium
Technical Impact
Total

Priority Score

35
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +35
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.

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

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