---
id: "CVE-2026-95877"
page: "https://infrastack.ai/live/CVE-2026-95877"
kind: "vulnerability"
aliases: ["CVE-2026-95877"]
title: "Windows Biometric Service heap overflow lets a local user gain higher privileges"
severity: "high"
cvss: 7.8
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["biometric-service", "infrastructure", "local", "privilege-escalation", "windows"]
not_affected_if: ["no-local-accounts-untrusted"]
published_at: "2026-11-10T19:21:40+00:00"
first_seen_at: "2026-11-10T19:25:22+00:00"
updated_at: "2026-11-10T20:32:56+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-95877", "first_seen_at": "2026-11-10T19:25:22+00:00"}, {"source": "analyst", "url": "https://api.msrc.microsoft.com/sug/v2.0/en-US/vulnerability/CVE-2026-95877", "first_seen_at": "2026-11-10T20:32:56+00:00", "cites": ["https://api.msrc.microsoft.com/sug/v2.0/en-US/vulnerability/CVE-2026-95877"]}]
exploit_sources: []
---

# Windows Biometric Service heap overflow lets a local user gain higher privileges

Link for people: https://infrastack.ai/live/CVE-2026-95877 (this .md is for agents)

A heap-based buffer overflow in the Windows Biometric Service lets a user who already has access to the machine overwrite memory. An attacker can use it to elevate their privileges on that machine.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

Open the Microsoft Security Update Guide entry for CVE-2026-95877 and match your Windows build (winver) against the listed KB; the affected builds and KB were not available in the data I could read. Machines with Windows Hello or fingerprint hardware use the Windows Biometric Service (check: Get-Service WbioSrvc).

## Timeline

- 2026-11-10T19:25:22+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-95877
- 2026-11-10T20:32:56+00:00 analyst https://api.msrc.microsoft.com/sug/v2.0/en-US/vulnerability/CVE-2026-95877 — MSRC API record read: Important, CVSS 7.8, local/low-priv, SYSTEM on success, not exploited, not publicly disclosed, exploitation less likely. Affected builds, KB and fix not in retrievable data (MSRC UI is JS-only); nothing verified. Web search not used. Revisit when the KB is listed.

## Documents

- [advisory] MSRC: CVE-2026-95877 Windows Biometric Service Elevation of Privilege https://api.msrc.microsoft.com/sug/v2.0/en-US/vulnerability/CVE-2026-95877

## From the sources

Heap-based buffer overflow in Windows Biometric Service allows an authorized attacker to elevate privileges locally.

---

_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_