Microsoft Windows: Privilege escalation in Windows Input System
Summary
A out-of-bounds read in the Windows Input System allows an authorized local attacker to elevate privileges. The attacker needs a valid low-privileged account or local code execution on the affected system. NVD analysis is pending, and the CVSS score of 8.8 is currently the only assessment available.
Affected
- Windows 10 Version 1809 and Windows Server 2019 (including Server Core): builds before 10.0.17763.9487
- Windows 10 Version 21H2: builds before 10.0.19044.7846
- Windows 10 Version 22H2: builds before 10.0.19045.7846
- Windows 11 Version 23H2: builds before 10.0.22631.7711
- Windows 11 Version 24H2: builds before 10.0.26100.9974
- Windows 11 Version 25H2 and 26H2: builds before 10.0.26200.9974 and 10.0.26300.9974
- Windows 11 Version 26H1: builds before 10.0.28000.3501
- Windows Server 2022: builds before 10.0.20348.5870
- Windows Server 2025 (including Server Core): builds before 10.0.26100.33822
Fixed in
- Install the Microsoft security update that brings the affected builds to the fixed versions listed above or later. KB numbers: Unknown.
Workaround
Unknown.
Exploitation
- CISA SSVC assessment: exploitation none, not automatable, total technical impact.
- No public reports of exploitation or proof-of-concept code were found at the time of writing.
Our recommendation
- Check the MSRC entry for CVE-2026-119862 and confirm the fixed builds and KB numbers.
- Apply the November 2026 cumulative update to all Windows workstations and servers, starting with systems used by several people or with shared logins.
- Review local accounts and limit administrative rights to reduce the impact of a local privilege escalation.
- Monitor NVD and CISA KEV for changes in the exploitation status.
Information from Microsoft (Patch Tuesday November 2026)
- Severity (Microsoft)
- Important
- Impact
- Elevation of privilege – Windows Input System
- Status on Patch Tuesday
- Neither exploited nor publicly disclosed
- Exploitability assessment
- Exploitation less likely
- Product family
- Windows, Windows ESU (Extended Security Updates)
- Updates (KB)
- KB5132061, KB5132043, KB5131085, KB5131090, KB5131096, KB5131080
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Microsoft Security Update Guide: CVE-2026-119862 msrc.microsoft.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 10 Nov 2026, 20:27.
Original description (NVD)
Out-of-bounds read in Windows Input System 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.
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