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Windows Function Discovery Service (fdwsd.dll) Elevation of Privilege Vulnerability

IdentifiersCVE-2026-32093CWE-362· Concurrent Execution using Shared…

CVE-2026-32093 is a local elevation-of-privilege vulnerability in the Windows Function Discovery Service component fdwsd.dll. The provided content identifies the issue as concurrent execution using a shared resource with improper synchronization, i.e., a race condition, and advisory material further states it involves race condition and heap-based buffer overflow issues. A locally authorized attacker can exploit this flaw to elevate privileges on the affected Windows system. The vulnerable condition exists in the Function Discovery Service’s handling of shared resources during concurrent execution, enabling unsafe memory/state manipulation that can be leveraged for privilege escalation.

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation allows a local authorized attacker to elevate privileges, reportedly up to administrator level. This can result in high impact to confidentiality, integrity, and availability, including the ability to execute actions with elevated rights, access or modify protected data, alter system configuration, and potentially disable or interfere with security controls.

Mitigation

If you can’t patch tonight, do this now.

No specific vendor workaround is provided in the supplied content. Until patches are fully deployed, reduce exposure by restricting local access to trusted users only, minimizing the number of accounts with local logon capability, enforcing least privilege, and monitoring for suspicious local privilege-escalation activity involving the Function Discovery Service.

Remediation

Patch, then assume compromise.

Apply Microsoft's official security update for CVE-2026-32093 to affected Windows systems in accordance with the Microsoft Security Update Guide. Ensure systems are running supported Windows versions and deploy the vendor patch through normal patch-management processes as a priority due to the likelihood of exploitation noted in the supporting content.
PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

EXPOSURE SURFACE

Affected products & vendors

Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.

VendorProductType
Microsoft CorporationWindowsoperating_system
Microsoft CorporationWindows 10 1607operating_system
Microsoft CorporationWindows 10 1809operating_system
Microsoft CorporationWindows 10 21h2operating_system
Microsoft CorporationWindows 10 22h2operating_system
Microsoft CorporationWindows 11 23h2operating_system
Microsoft CorporationWindows 11 24h2operating_system
Microsoft CorporationWindows 11 25h2operating_system
Microsoft CorporationWindows 11 26h1operating_system
Microsoft CorporationWindows Server 2012operating_system
Microsoft CorporationWindows Server 2012 R2operating_system
Microsoft CorporationWindows Server 2016operating_system
Microsoft CorporationWindows Server 2019operating_system
Microsoft CorporationWindows Server 2022operating_system
Microsoft CorporationWindows Server 2022 23h2operating_system
Microsoft CorporationWindows Server 2025operating_system
Microsoft CorporationWindows Server 23h2operating_system

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

What this page doesn’t show

The version that knows your environment.

This page is what’s public. Mallory adds the parts that aren’t: which of your assets are affected, which adversaries are exploiting it right now, which detections to deploy, and what to do tonight.
Exposure mapping

Query your assets running an affected version, and investigate the blast radius.

Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures1

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity

Community discussion across Reddit, Mastodon, and other social sources.