CVE-2026-83877

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Integer Overflow in HID Parser Library Leads to Privilege Escalation

Publication date: 2026-10-13

Last updated on: 2026-10-16

Assigner: Microsoft Corporation

Description

Integer overflow or wraparound in HID Parser Library allows an authorized attacker to elevate privileges locally.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-10-13

Last Modified

2026-10-16

Generated

2026-10-19

AI Q&A

2026-10-14

EPSS Evaluated

2026-10-18

NVD

CVE-2026-83877

EUVD

EUVD-2026-100029

Affected Vendors & Products

Vendor	Product	Version / Range
Microsoft	Windows	10 Version 1809 10.0.17763.0
Microsoft	Windows	10 Version 21H2 10.0.19044.0
Microsoft	Windows	10 Version 22H2 10.0.19045.0
Microsoft	Windows	11 version 23H2 10.0.22631.0
Microsoft	Windows	11 Version 23H2 10.0.22631.0
Microsoft	Windows	11 Version 24H2 10.0.26100.0
Microsoft	Windows	11 Version 25H2 10.0.26200.0
Microsoft	Windows	11 version 26H1 10.0.28000.0
Microsoft	Windows	11 Version 26H2 10.0.26300.0
Microsoft	Windows	Server 2019 10.0.17763.0
Microsoft	Windows	Server 2019 (Server Core installation) 10.0.17763.0
Microsoft	Windows	Server 2022 10.0.20348.0
Microsoft	Windows	Server 2025 10.0.26100.0
Microsoft	Windows	Server 2025 (Server Core installation) 10.0.26100.0

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-190	The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.

Attack-Flow Graph

Executive Summary

This vulnerability is an integer overflow or wraparound flaw in the HID Parser Library. An authorized attacker can exploit it to elevate their privileges locally on affected systems.

Impact Analysis

An attacker with local access could exploit this to gain higher privileges than intended, potentially allowing them to execute arbitrary code or take control of the system.

Compliance Impact

This vulnerability allows local privilege escalation through an integer overflow in the HID Parser Library. Such unauthorized privilege elevation could lead to unauthorized access to sensitive data or system functions, potentially violating compliance requirements for data protection standards like GDPR or HIPAA.

Mitigation Strategies

Apply the latest security updates from Microsoft to patch the HID Parser Library vulnerability. Monitor Microsoft's update guide for CVE-2026-83877 for specific patches.

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