Microsoft Remote Registry Service: Denial of service through out-of-bounds read
Summary
An out-of-bounds read in the Microsoft Remote Registry Service, a Windows component, affects multiple Windows 10, Windows 11 and Windows Server versions. An authorized attacker with low privileges can reach the service over the network and crash it, causing a denial of service. Confidentiality and integrity are not affected according to the CVSS vector, and exploitation requires high attack complexity.
Affected
- Windows 10 Version 1607 (10.0.14393.0 before 10.0.14393.9688)
- Windows 10 Version 1809 (10.0.17763.0 before 10.0.17763.9487)
- Windows 10 Version 21H2 (10.0.19044.0 before 10.0.19044.7846)
- Windows 10 Version 22H2 (10.0.19045.0 before 10.0.19045.7846)
- Windows 11 Version 23H2 (10.0.22631.0 before 10.0.22631.7711)
- Windows 11 Version 24H2 (10.0.26100.0 before 10.0.26100.9974)
- Windows 11 Version 25H2 (10.0.26200.0 before 10.0.26200.9974)
- Windows 11 Version 26H1 (10.0.28000.0 before 10.0.28000.3501)
- Windows 11 Version 26H2 (10.0.26300.0 before 10.0.26300.9974)
- Windows Server 2016 incl. Server Core (10.0.14393.0 before 10.0.14393.9688)
- Windows Server 2019 incl. Server Core (10.0.17763.0 before 10.0.17763.9487)
- Windows Server 2022 (10.0.20348.0 before 10.0.20348.5870)
Fixed in
Fixed in the November 2026 security updates. Install the build number at or above the fixed version listed for each product. KB article numbers: Unknown.
Workaround
None documented in the sources reviewed.
Exploitation
- No evidence of exploitation in the wild.
- No public proof of concept known.
- CISA SSVC: exploitation none, not automatable, partial technical impact.
- Rapid7 lists the exploitation likelihood as less likely.
- The status may change, as this is a fresh disclosure.
Our recommendation
- Install the November 2026 cumulative update on all affected systems, prioritizing servers and hosts that run the Remote Registry service.
- Check whether Windows 10 1607, 1809 and 21H2 systems are still supported or enrolled in Extended Security Updates.
- If the Remote Registry service is not needed, stop and disable it.
- Restrict network access to the relevant RPC and SMB ports to administrative hosts only.
- Ensure that no host with this service is reachable from untrusted networks.
Information from Microsoft (Patch Tuesday November 2026)
- Severity (Microsoft)
- Important
- Impact
- Denial of service – Microsoft Remote Registry Service
- Status on Patch Tuesday
- Neither exploited nor publicly disclosed
- Exploitability assessment
- Exploitation less likely
- Product family
- Windows, Windows ESU (Extended Security Updates)
- Updates (KB)
- KB5131291, KB5131085, KB5131096, KB5131090, KB5131087, KB5132061
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Microsoft Security Update Guide msrc.microsoft.com
- CVE.org Record CVE-2026-105492 www.cve.org
- Rapid7 Patch Tuesday November 2026 www.rapid7.com
- Cybersecurity News: Microsoft November 2026 Patch Tuesday cybersecuritynews.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 11 Nov 2026, 18:36.
Original description (NVD)
Out-of-bounds read in Microsoft Remote Registry Service allows an authorized attacker to deny service over a network.
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.
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