Microsoft Windows Remote Access API: Improper access control allows tampering
Summary
A missing authorization check (CWE-862) in the Windows Remote Access API allows an authorized local user to tamper with data handled by this component. Exploitation requires an existing logon or foothold on the system and a high-complexity attack. The CVSS v3.1 base score is 6.5 (Medium), with high confidentiality and integrity impact. The attack vector is local, so remote exploitation is not expected.
Affected
- Windows 10 Version 1607 (builds before 10.0.14393.9688)
- Windows 10 Version 1809 (builds before 10.0.17763.9487)
- Windows 10 Version 21H2, 22H2 (affected builds listed in the CVE record as before 10.0.19044.7846 and 10.0.19045.7846; the fixed builds are not confirmed by the vendor page)
- Windows 11 Version 23H2 (builds before 10.0.22631.7711)
- Windows 11 Version 24H2, 25H2, 26H1, 26H2 (fixed builds not confirmed; the sources disagree)
- Windows Server 2016 and 2019, including Server Core (builds before 10.0.14393.9688 and 10.0.17763.9487)
- Windows Server 2022 (fixed build not confirmed; a third-party source lists 10.0.20348.5870)
Fixed in
- Windows 10 1607 and Windows Server 2016: 10.0.14393.9688
- Windows 10 1809 and Windows Server 2019: 10.0.17763.9487
- Windows 11 23H2: 10.0.22631.7711
- Other branches: Unknown. Verify on the MSRC advisory before rollout.
Workaround
Unknown.
Exploitation
- CISA SSVC: exploitation none, automatable no, technical impact total.
- CVSS exploit maturity: Unproven.
- No public proof-of-concept found. The CISA KEV catalogue was not checked.
Our recommendation
- Install the November 2026 security update on affected Windows systems, prioritising Windows Server 2016 and 2019 and multi-user hosts such as terminal or RDS servers.
- Confirm the fixed build for each system on the MSRC advisory before deployment, as the sources disagree on some builds.
- Restrict local logon rights on shared systems and monitor for unexpected changes to remote access settings.
Information from Microsoft (Patch Tuesday November 2026)
- Severity (Microsoft)
- Important
- Impact
- Tampering – Windows Remote Access API
- 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 Response Center: CVE-2026-119396 msrc.microsoft.com
- CVE.org record CVE-2026-119396 www.cve.org
- Strix: CVE-2026-119396 www.strix.ai
- Senserva: KB5131085 (third-party summary) senserva.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, 12:08.
Original description (NVD)
Improper access control in Windows Remote Access API allows an authorized attacker to perform tampering 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.
We check whether your systems are affected, install updates and close the gap – continuously with the System Health Checker if you wish.