Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain
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AccessGain local low-privileged access
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DeliveryInvoke USB print driver operation
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ExploitWin race to trigger use-after-free
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ExecutionCorrupt and reclaim freed kernel object
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ImpactElevate 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. |
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Alert meAnalysisAIv1 – 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
Affected Packages
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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Severity by source
AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
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).
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
2DescriptionCVE.org
Use after free in Windows USB Print Driver allows an authorized attacker to elevate privileges locally.
Executive ViewAI
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.
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Threat Intelligence Overview
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.
What every action level means
SSVC AssessmentENISA
Priority Score
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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EUVD-2026-100214
GHSA-h286-h27h-8525
NVD
CVE.org
EPSS
Vulnrichment
Exploit-DB