---
id: "CVE-2026-113765"
page: "https://infrastack.ai/live/CVE-2026-113765"
kind: "vulnerability"
aliases: ["CVE-2026-113765"]
title: "Windows Server File Server Resource Management Service: heap overflow lets a local user gain privileges"
severity: "high"
cvss: 7.8
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: [{"name": "Windows File Server Resource Management Service", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "Windows Server 2016", "fixed": ["10.0.14393.9688"], "affected": ">= 10.0.14393.0, < 10.0.14393.9688", "ecosystem": "vendor"}, {"name": "Windows Server 2019", "fixed": ["10.0.17763.9487"], "affected": ">= 10.0.17763.0, < 10.0.17763.9487", "ecosystem": "vendor"}, {"name": "Windows Server 2022", "fixed": ["10.0.20348.5870"], "affected": ">= 10.0.20348.0, < 10.0.20348.5870", "ecosystem": "vendor"}, {"name": "Windows Server 2025", "fixed": ["10.0.26100.33822"], "affected": ">= 10.0.26100.0, < 10.0.26100.33822", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["file-server", "fsrm", "infrastructure", "local-privilege-escalation", "windows", "windows-server"]
not_affected_if: ["fsrm-not-installed", "patched"]
published_at: "2026-11-10T19:18:55+00:00"
first_seen_at: "2026-11-10T19:24:40+00:00"
updated_at: "2026-11-11T00:15:51+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-113765", "first_seen_at": "2026-11-10T19:24:40+00:00"}, {"source": "analyst", "url": "https://cveawg.mitre.org/api/cve/CVE-2026-113765", "first_seen_at": "2026-11-11T00:15:51+00:00", "cites": ["https://cveawg.mitre.org/api/cve/CVE-2026-113765"]}]
exploit_sources: []
---

# Windows Server File Server Resource Management Service: heap overflow lets a local user gain privileges

Link for people: https://infrastack.ai/live/CVE-2026-113765 (this .md is for agents)

A heap-based buffer overflow in the Windows File Server Resource Management Service lets an authorized local user raise their privileges. Exploitation requires that the attacker already has a valid account on the machine.

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

## Affected

- vendor:Windows File Server Resource Management Service affected range not listed fixed no fixed version listed
- vendor:Windows Server 2016 affected >= 10.0.14393.0, < 10.0.14393.9688 fixed 10.0.14393.9688
- vendor:Windows Server 2019 affected >= 10.0.17763.0, < 10.0.17763.9487 fixed 10.0.17763.9487
- vendor:Windows Server 2022 affected >= 10.0.20348.0, < 10.0.20348.5870 fixed 10.0.20348.5870
- vendor:Windows Server 2025 affected >= 10.0.26100.0, < 10.0.26100.33822 fixed 10.0.26100.33822

## How to check

Run 'winver' or '[System.Environment]::OSVersion.Version' (PowerShell) and compare the full build (including revision) with the fixed builds. FSRM present? Run 'Get-WindowsFeature FS-Resource-Manager' (Installed = exposed if build is below fixed).

## Fix

Install the November 2026 cumulative update for your Windows Server version, which brings the build to at least: Server 2016 10.0.14393.9688, Server 2019 10.0.17763.9487, Server 2022 10.0.20348.5870, Server 2025 10.0.26100.33822. KB numbers not read; look them up in the MSRC Security Update Guide entry.

## Timeline

- 2026-11-10T19:24:40+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-113765
- 2026-11-11T00:15:51+00:00 analyst https://cveawg.mitre.org/api/cve/CVE-2026-113765 — Read Microsoft's CNA CVE record (MSRC page is JS-only, did not load). Fixed builds per Server version; CISA SSVC: no exploitation, not automatable. KB numbers and FSRM-role dependency not confirmed from MSRC text; check command is standard PowerShell, unverified.

## Documents

- [advisory] Microsoft CNA CVE record: Windows File Server Resource Management Service Elevation of Privilege Vulnerability https://cveawg.mitre.org/api/cve/CVE-2026-113765

## From the sources

Heap-based buffer overflow in Windows File Server Resource Management 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_