EUVD-2026-35551
GHSA-7wcr-pr25-7v9h
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain
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AccessObtain low-privileged local access
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DeliveryInvoke vulnerable SDK component
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ExploitTrigger integer overflow causing use-after-free
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ExecutionGroom heap to control freed object
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PersistHijack execution in privileged context
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ImpactEscalate to SYSTEM
Vulnerability Assessment
| Weakness |
CWE
ASVS 5.0
V15 - Secure Coding and Architecture Integer overflow checks
MITRE ATT&CK
1 technique across 1 tactic: Execution 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 already have local code execution as a low-privileged authenticated user on a Windows host that has the vulnerable Windows SDK component installed or loaded (PR:L, AV:L, UI:N). No user interaction is required, but exploitation is limited to scenarios where the attacker can invoke or feed input to a process linked against the affected SDK runtime - typically developer workstations, build servers, or systems with SDK redistributable components present. Remote, unauthenticated exploitation is not possible per the CVSS vector, and kiosked or hardened endpoints without local code execution avenues are not realistically exposed. |
| Impact | The CVSS vector AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H indicates a local attacker with low privileges and no user interaction can fully compromise confidentiality, integrity, and availability - a classic local privilege escalation profile scored 7.8 (High). There is a notable inconsistency between the CWE classification (CWE-190 Integer Overflow) and the description (use-after-free), and the tags also include 'Denial Of Service' which is inconsistent with the C:H/I:H/A:H impact metrics - defenders should verify the exact root cause with Microsoft's advisory before relying on detections. EPSS data is not provided in the input, the vulnerability is not listed in CISA KEV, and no POC has been identified, so real-world exploitation risk should be treated as moderate: high impact if chained with initial access, but not currently a mass-exploitation priority. Because the SDK is a developer-side component, exposure is concentrated on workstations and build hosts rather than production servers, narrowing the realistic attack surface. |
| Exploit ScenarioDerived | A low-privileged user - for example, a standard domain account on a developer workstation or a CI build agent - executes a crafted local binary or input file that triggers the use-after-free in an SDK-provided component. The attacker grooms the heap so that the freed object is replaced with attacker-controlled data, then forces a dereference that hijacks execution and runs code at SYSTEM or another high-privileged context, completing local privilege escalation. |
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Alert meAnalysisAIv1 – Jun 09, 2026
Local privilege escalation in Microsoft Windows SDK enables an authenticated low-privileged attacker to elevate to higher privileges by exploiting a use-after-free memory corruption flaw. The CVSS 7.8 (AV:L/AC:L/PR:L) profile reflects local attack with low complexity and low privileges required, yielding full confidentiality, integrity, and availability impact. No public exploit identified at time of analysis and the vulnerability is not currently listed in CISA KEV.
RemediationAI
Patch availability per vendor advisory should be confirmed by reviewing the Microsoft Security Response Center entry at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45593 and applying the fixed Windows SDK release once Microsoft publishes the exact build numbers; the input data does not include a specific patched version. As compensating controls until patches are deployed, restrict local interactive and RDP access on developer workstations and build agents to trusted users, enforce least-privilege on accounts that run SDK tooling, and monitor for unexpected child processes or token manipulation by SDK-linked binaries - note that tightening local access can disrupt developer productivity and CI pipelines, so coordinate with engineering teams. Application allowlisting (e.g., Windows Defender Application Control) can further reduce the risk of arbitrary local binaries triggering the vulnerable code path at the cost of additional rule maintenance.
Affected VersionsENISA
Affected Packages
Source: OSV (Open Source Vulnerabilities)
Affects your stack
Affects 23 packages in microsoft, euvd
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
The flaw resides in the Microsoft Windows SDK, the developer toolkit that ships headers, libraries, and runtime components used to build Windows applications. Although the CWE is tagged as CWE-190 (Integer Overflow), the description identifies a use-after-free condition, suggesting an integer overflow that miscomputes an allocation size or reference count and leads to premature freeing of an object that is later dereferenced. Exploiting such a dangling pointer typically yields control over a freed heap chunk, allowing an attacker to corrupt adjacent structures or hijack object virtual tables to achieve code execution in the context of a higher-privileged process linked against the SDK runtime.
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Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
DescriptionCVE.org
Use after free in Windows SDK allows an authorized attacker to elevate privileges locally.
Executive ViewAI
Microsoft Windows SDK contains a local privilege escalation vulnerability (CVE-2026-45593) that allows authenticated low-privilege users to gain full system access through memory corruption. The absence of a vendor patch creates persistent risk for organizations relying on Windows SDK in development or build environments. Without active exploitation observed to date, the vulnerability remains a significant insider threat and lateral movement vector if systems are compromised.
No vendor-released patch identified at time of analysis. Interim mitigations: (1) Enforce role-based access controls limiting SDK access to authorized developers; (2) Run SDK components with minimal required privileges; (3) Monitor kernel-level privileged transitions and memory access violations on systems running SDK; (4) Implement application whitelisting for SDK binaries to prevent tampering; (5) Segment development systems running SDK from critical infrastructure to limit lateral movement if exploited.
Threat Intelligence Overview
NVD
CVE.org
EPSS
Vulnrichment
VulDB
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
Integer overflow occurs when an arithmetic operation produces a result that exceeds the maximum value a given integer type can store.
Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.
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