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Attack ChainAIDerived

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

  1. Access
    Deliver crafted OLE object to target
  2. Delivery
    Victim processes/previews malicious object
  3. Exploit
    Trigger untrusted pointer dereference in OLE
  4. Execution
    Control pointer and execute arbitrary code
  5. Impact
    Full compromise of host (total impact)

Vulnerability Assessment

Weakness
CWE
ASVS 5.0
V15 - Secure Coding and Architecture Untrusted pointer prevention
Exploitation Conditions

Exploitation requires the vulnerable Windows OLE component to process an attacker-controlled OLE object (typically embedded in a document, email, or file), and the attacker must sufficiently control the dereferenced pointer and memory layout to achieve code execution. Microsoft's vector asserts UI:N and PR:N, implying no authentication and potentially automatic triggering (e.g., via preview/embedded-object handling), but OLE flaws of this class commonly depend on a user opening or previewing crafted content - the practical limiting factor. Patched builds per EUVD close the issue, so unpatched systems in the listed version ranges are the exposed population; there is no indication a non-default configuration is required.

Impact

Signals diverge sharply here, so this warrants nuance. CVSS 3.1 is 9.8 (AV:N/AC:L/PR:N/UI:N) with total C/I/A impact, and SSVC rates Technical Impact as 'total' and Automatable as 'yes' - on paper a top-tier remote, unauthenticated RCE. However, SSVC Exploitation is 'none', there is no CISA KEV listing, no POC, and no EPSS score was provided, so there is currently no evidence of exploitation or published exploit code. A material tension exists: the flaw is CWE-822 (untrusted pointer dereference) in Windows OLE, a component historically reached by a victim opening or previewing a malicious document/object rather than by a purely server-side network request; the UI:N in Microsoft's vector likely reflects preview-pane or embedded-object triggering, but real-world exploitation very plausibly requires user interaction and non-trivial pointer control - verify the true delivery path with Microsoft. Net: treat as a high patching priority given ubiquitous Windows footprint, a vendor patch, and 'automatable=yes', but temper urgency because no active exploitation or POC is currently known (SSVC exploitation=none, no KEV).

Exploit ScenarioDerived

A remote attacker delivers a crafted OLE object (e.g., embedded in an Office document, email, or file) that, when processed by a vulnerable Windows system, triggers an untrusted pointer dereference in the OLE subsystem. By controlling the dereferenced pointer and memory layout, the attacker achieves arbitrary code execution with the impacted process's privileges. No public exploit identified at time of analysis, and the low attack complexity (AC:L) in the vendor vector suggests reliable triggering once a malicious object is processed.

Act Now Prioritize within 24-48h. Why: CRITICAL severity.
Patch available 0.9% exploitation probability (EPSS)

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AnalysisAIv1 – Oct 13, 2026

Untrusted pointer dereference in Windows OLE (Object Linking and Embedding) permits remote code execution on unpatched Windows systems, with the vulnerable component processing an attacker-supplied OLE object such as an embedded object inside a document, email, or other file. The vendor-declared CVSS 3.1 vector is AV:N/AC:L/PR:N/UI:N (9.8), but our independent assessment scores it 9.8 with AC:H/UI:R, reflecting that successful exploitation realistically requires a victim to open or preview crafted content and that the attacker must control both the dereferenced pointer and the surrounding memory layout to gain code execution. Exploitation status is currently negative: CISA's SSVC decision framework rates Exploitation as "none," no CISA KEV listing is present, and no public exploit code has been identified at time of analysis, though the flaw is fully automatable (SSVC Automatable: yes) with total technical impact if triggered. Vendor patches are available, and every Windows build below the fixed build numbers listed in the EUVD data remains exposed.

RemediationAI

Vendor-released patches are available: apply the Microsoft security update for CVE-2026-96924 so that each host reaches or exceeds its fixed build - 10.0.14393.9612 (Windows 10 1607 / Server 2016), 10.0.17763.9376 (Windows 10 1809 / Server 2019), 10.0.19044.7807 (Windows 10 21H2/22H2), 10.0.22631.7652 (Windows 11 23H2), 10.0.26100.9711 (Windows 11 24H2) or 10.0.26100.33650 (Server 2025), 10.0.26200.9711 (Windows 11 25H2), 10.0.26300.9711 (Windows 11 26H2), 10.0.28000.3231 (Windows 11 26H1), 10.0.20348.5761 (Server 2022), 6.3.9600.23470 (Server 2012 R2), and 6.2.9200.26434 (Server 2012); consult https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-96924 for the exact KB per build and note that the 2012/2012 R2 updates require the paid Extended Security Update program, so those platforms may have no freely obtainable fix and should be migrated off if ESU is not in place. Where patching must be staged, reduce exposure to the OLE parsing path: block OLE/embedded-object file types at the email gateway and web proxy and enable Mark-of-the-Web enforcement so downloaded documents open in a restricted mode - the trade-off is that legitimate macro-free embedded-object workflows will break or require user overrides. Disable Explorer preview panes and thumbnail handlers for untrusted locations (via policy or by removing the relevant preview handlers) so simply browsing a folder or email no longer renders an OLE object; this costs preview convenience but removes a trigger surface. Deploy the Microsoft Defender Attack Surface Reduction rules that block Office applications from creating child processes and from injecting code, and run Office in Protected View for files from the internet - these substantially raise exploitation cost but can interfere with signed add-ins and legitimate automation. Segment and restrict SMB/RDP and other file-transfer paths into servers running the exposed builds, since server SKUs back to 2012 are in scope, and monitor for surprising child processes (for example, Office spawning scripting or shell binaries), which is the highest-fidelity detection signal for a successful dereference-to-execution chain. None of these compensating controls address the underlying pointer-validation defect, so they should be treated only as temporary measures until the patched build is applied.

Affected VersionsENISA

Windows 10 Version 1607 10.0.14393.0 <10.0.14393.9612
Windows 10 Version 1809 10.0.17763.0 <10.0.17763.9376
Windows Server 2025 (Server Core installation) 10.0.26100.0 <10.0.26100.33650
Windows Server 2012 R2 (Server Core installation) 6.3.9600.0 <6.3.9600.23470
Windows Server 2022 10.0.20348.0 <10.0.20348.5761
Windows 10 Version 22H2 10.0.19045.0 <10.0.19044.7807
Windows Server 2019 10.0.17763.0 <10.0.17763.9376
Windows 11 Version 24H2 10.0.26100.0 <10.0.26100.9711
Windows Server 2016 10.0.14393.0 <10.0.14393.9612
Windows Server 2012 R2 6.3.9600.0 <6.3.9600.23470
Windows Server 2025 10.0.26100.0 <10.0.26100.33650
Windows Server 2012 6.2.9200.0 <6.2.9200.26434
Windows 11 Version 25H2 10.0.26200.0 <10.0.26200.9711
Windows Server 2012 (Server Core installation) 6.2.9200.0 <6.2.9200.26434
Windows Server 2016 (Server Core installation) 10.0.14393.0 <10.0.14393.9612
Windows 11 version 26H1 10.0.28000.0 <10.0.28000.3231
Windows Server 2019 (Server Core installation) 10.0.17763.0 <10.0.17763.9376
Windows 10 Version 21H2 10.0.19044.0 <10.0.19044.7807
Windows 11 Version 26H2 10.0.26300.0 <10.0.26300.9711
Windows 11 Version 23H2 10.0.22631.0 <10.0.22631.7652

Affected Packages

euvd windows_10_version_1607 fix: 10.0.14393.9612
euvd windows_10_version_1809 fix: 10.0.17763.9376
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_2012 fix: 6.2.9200.26434
euvd windows_server_2012_r2 fix: 6.3.9600.23470
euvd windows_server_2012_r2_server_core_installation fix: 6.3.9600.23470
euvd windows_server_2012_server_core_installation fix: 6.2.9200.26434
euvd windows_server_2016 fix: 10.0.14393.9612
euvd windows_server_2016_server_core_installation fix: 10.0.14393.9612
euvd windows_server_2019 fix: 10.0.17763.9376
euvd windows_server_2019_server_core_installation fix: 10.0.17763.9376
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 20 packages in euvd

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

Technical ContextAI · show details

This is a memory-safety defect in Microsoft's OLE subsystem, classified under CWE-822 (Untrusted Pointer Dereference): the code follows a pointer value that originated from untrusted input without validating it, so a crafted OLE object can redirect the dereference to attacker-influenced memory. OLE underpins Compound Document / structured-storage handling, embedded and linked objects, and the COM plumbing exposed through libraries such as ole32/oleaut32, and is reached whenever Windows or an application parses a document containing an embedded object, including thumbnail/preview and shell-handling paths typically triggered once a user opens, previews, or interacts with such content. Successful exploitation therefore depends not just on supplying a malformed OLE stream but on shaping memory so the dereferenced pointer lands on controlled data - which is why the exploit complexity is assessed as high even though the vendor vector advertises AC:L/UI:N. The CPE/version data shows the affected population spans the modern Windows servicing branches (Windows 10 21H2/22H2, Windows 11 23H2/24H2/25H2/26H1/26H2) as well as the server line back to Windows Server 2012 and 2012 R2, so the OLE code path is common across client and server SKUs rather than confined to a single product or edition. There is no indication that a non-default configuration is required to expose the flaw.

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Severity by source

Vendor (microsoft) PRIMARY 9.8 CRITICAL
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
ENISA EUVD HIGH
vuln.today AI 7.5 HIGH

OLE untrusted-pointer RCE realistically needs a victim to open crafted content (UI:R) and reliable pointer/heap control (AC:H); no auth (PR:N), full host impact.

3.1 AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
4.0 AV:N/AC:H/AT:N/PR:N/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
Low
Privileges Required
None
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 - 19:22 cve.org
CRITICAL 9.8

DescriptionCVE.org

Untrusted pointer dereference in Windows OLE allows an unauthorized attacker to execute code over a network.

Executive ViewAI

Why It Matters

Windows Object Linking and Embedding (OLE) contains a critical remote code execution vulnerability that affects unpatched Windows systems across the organization, allowing an attacker to gain full control of a machine if a user opens a crafted document or email. Although no public exploit identified at time of analysis exists, the flaw is fully automatable and carries total technical impact, making immediate patching essential to prevent potential widespread compromise.

Business Impact: High
Compensating Controls

Apply vendor patch.

Threat Intelligence Overview

EPSS Score
0.9%
Top 41% exploitable
Prevalence
Ubiquitous
Windows OLE ships in every supported Windows client and server edition
Threat Intel
1
1 sources
Vendor Status
Publicly Disclosed:No
Exploited:No
Latest Software Release:Exploitation Less Likely
Data Quality
6 sources
Confidence: High

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 CRITICAL
CISA KEV No
Public POC No
EPSS 0.9%
Patch available Yes
Active threat No
Deciding rule
CRITICAL severity
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
Yes
Human Impact
High
Technical Impact
Total

Priority Score

55
Low Medium High Critical
KEV: 0
EPSS: +1
CVSS: +49
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: +5
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