Microsoft Windows HID Parser Library: Elevation of privilege via integer overflow
Summary
Microsoft has published an advisory for an integer overflow or wraparound (CWE-190) in the HID Parser Library, a Windows component. A local attacker with physical access to an affected system may be able to elevate privileges. The CVSS vector requires no privileges and no user interaction, and the base score is 6.8 (medium).
Affected
- Windows 10 Version 1607: before 10.0.14393.9688
- Windows 10 Version 1809: before 10.0.17763.9487
- Windows 10 Version 21H2: before 10.0.19044.7846
- Windows 10 Version 22H2: before 10.0.19045.7846
- Windows 11 Version 23H2: before 10.0.22631.7711
- Windows 11 Version 24H2: before 10.0.26100.9974
- Windows 11 Version 25H2: before 10.0.26200.9974
- Windows 11 Version 26H1: before 10.0.28000.3501
- Windows 11 Version 26H2: before 10.0.26300.9974
- Windows Server 2016 (including Server Core): before 10.0.14393.9688
- Windows Server 2019 (including Server Core): before 10.0.17763.9487
- Windows Server 2022: before 10.0.20348.5870
Fixed in
- Builds at the versions listed after "before" above, or later, contain the fix.
- Install the November 2026 Windows security update from the MSRC advisory.
Workaround
Unknown. No vendor-documented mitigations were found, so applying the update is the remedy.
Exploitation
- Not known to be exploited, according to a third-party tracker (OffSeq snapshot, 10 Nov 2026).
- CISA SSVC assessment: exploitation none, not automatable, total technical impact.
- No public proof of concept found. CISA KEV listing not confirmed.
Our recommendation
- Install the November 2026 cumulative update on all listed Windows versions, starting with shared, public and kiosk systems.
- Inventory Windows 10 1607 and 1809 systems first and check whether they are still supported.
- Restrict physical access to workstations and limit USB devices where feasible.
- Re-check NVD and CISA KEV in the coming days, as the NVD analysis was still pending at the time of writing.
Information from Microsoft (Patch Tuesday November 2026)
- Severity (Microsoft)
- Important
- Impact
- Elevation of privilege – HID Parser Library
- 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 Record CVE-2026-96979 www.cve.org
- Microsoft Security Update Guide CVE-2026-96979 msrc.microsoft.com
- OffSeq Radar CVE-2026-96979 radar.offseq.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, 10:18.
Original description (NVD)
Integer overflow or wraparound in HID Parser Library 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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