Microsoft Windows Server 2022: Elevation of privilege in Windows Modern Device Management
Summary
A flaw classified as CWE-763 (release of invalid pointer or reference) in the Windows Modern Device Management (MDM) component of Windows Server 2022 allows an authorized attacker to elevate privileges locally. The attack requires a low-privileged account on the system and is not remotely exploitable by itself. Successful exploitation could grant an attacker full control (SYSTEM level) over the affected host.
Affected
- Windows Server 2022 (x64), builds 10.0.20348.0 up to, but not including, 10.0.20348.5761
- Azure Stack HCI 22H2 may be affected under the same KB; the CNA lists only Windows Server 2022, so scope is unconfirmed.
Fixed in
- Build 10.0.20348.5761 or later (Microsoft KB5126655, released 13 Oct 2026)
Workaround
Unknown.
Exploitation
- No evidence of in-the-wild exploitation found in the sources reviewed; CISA KEV status not verified directly.
- No public proof of concept found.
- CISA SSVC: Exploitation none, Automatable no, Technical Impact total.
- EPSS about 0.35% (low predicted exploitation probability).
Our recommendation
- Apply the October 2026 cumulative update to reach build 10.0.20348.5761 or later on all Windows Server 2022 hosts.
- Check whether Azure Stack HCI systems are in your estate and patch them under the same KB if applicable.
- Restrict interactive and remote logons to Server 2022 hosts to administrators.
- Patch the MDM component family together, including the September 2026 MDM flaw CVE-2026-69460.
- Verify the affected versions against the MSRC advisory before rollout.
Information from Microsoft (Patch Tuesday October 2026)
- Severity (Microsoft)
- Important
- Impact
- Elevation of privilege – Windows Modern Device Management (MDM)
- Status on Patch Tuesday
- Neither exploited nor publicly disclosed
- Exploitability assessment
- Exploitation less likely
- Product family
- Windows
- Updates (KB)
- KB5126655
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Microsoft Security Response Center advisory msrc.microsoft.com
- Vulners CVE list record (CNA JSON) vulners.com
- Vulners NVD record vulners.com
- EUVD-2026-100452 (mskb reference) vulners.com
- ThreatInt CVE record cve.threatint.com
- VulDB entry vuldb.com
Researched and written up in English and German by an AI (Claude by Anthropic) based on NVD, CISA, EPSS and the sources listed. The vendor information is authoritative. Researched on 2 Nov 2026, 05:01.
Original description (NVD)
Release of invalid pointer or reference in Windows Modern Device Management (MDM) allows an authorized attacker to elevate privileges locally.
NVD references (1)
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
Affected? We can help.
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