Microsoft Windows RNDIS: Elevation of privilege via out-of-bounds read
Summary
A flaw in the Windows RNDIS networking driver, which handles USB-attached network devices, allows an out-of-bounds read that can lead to elevation of privilege. According to the CVE record, an attacker needs physical access to the device and no privileges, with low complexity; the CVSS 3.1 score is 6.8 (medium). Exploitation is not known at publication, and the CVSS vector indicates no known exploit code.
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 (version range incomplete in the CVE record)
- 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, including Server Core (10.0.14393.0 before 10.0.14393.9688)
- Windows Server 2019, including 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 builds per the CVE record, as listed under affected; the November 2026 security updates are the expected fix, but no KB number specific to this CVE has been confirmed.
- Check the MSRC Security Update Guide for the exact KB per product.
Workaround
- Unknown. No vendor-documented workaround was found.
Exploitation
- Exploitation: none according to CISA SSVC assessment in the CVE data.
- Automatable: no.
- Not listed as a zero-day in the November 2026 coverage reviewed.
- Publicly disclosed or exploited status in Microsoft's flags: unknown.
- Public proof of concept: not known.
Our recommendation
- Apply the November 2026 cumulative update to affected Windows 10, Windows 11 and Windows Server hosts, after confirming the KB for each product in the MSRC Security Update Guide.
- Prioritise shared, unattended and reception or meeting-room workstations and any Windows 10 1607/1809 or Server 2016/2019 systems.
- Restrict USB network devices and device installation through managed-device policy.
- Control physical access to servers and shared workstations.
- Flag Windows 10 1607 and 1809 as end-of-life systems requiring a separate upgrade.
Information from Microsoft (Patch Tuesday November 2026)
- Severity (Microsoft)
- Important
- Impact
- Elevation of privilege – Windows RNDIS
- Status on Patch Tuesday
- Neither exploited nor publicly disclosed
- Exploitability assessment
- Exploitation unlikely
- 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
- CVE.org record www.cve.org
- MSRC Security Update Guide advisory msrc.microsoft.com
- Strix.ai summary (secondary) www.strix.ai
- Microsoft Patch Tuesday November 2026 (Qualys review) blog.qualys.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, 10:42.
Original description (NVD)
Out-of-bounds read in Windows RNDIS allows an unauthorized attacker to elevate privileges with a physical attack.
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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