---
id: "CVE-2026-70240"
page: "https://infrastack.ai/live/CVE-2026-70240"
kind: "vulnerability"
aliases: ["CVE-2026-70240"]
title: "Windows Kerberos: memory leak lets a network attacker deny service"
severity: "high"
cvss: 7.5
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["active-directory", "domain-controller", "infrastructure", "kerberos", "windows"]
not_affected_if: []
published_at: "2026-11-10T19:21:21+00:00"
first_seen_at: "2026-11-10T19:25:17+00:00"
updated_at: "2026-11-10T21:13:53+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-70240", "first_seen_at": "2026-11-10T19:25:17+00:00"}, {"source": "analyst", "url": null, "first_seen_at": "2026-11-10T21:13:53+00:00"}]
exploit_sources: []
---

# Windows Kerberos: memory leak lets a network attacker deny service

Link for people: https://infrastack.ai/live/CVE-2026-70240 (this .md is for agents)

Windows Kerberos does not release memory after it is no longer needed, a flaw that a remote, unauthenticated attacker can trigger over the network. The result is a denial of service, meaning the affected system can slow down or stop responding.

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

## How to check

Unknown: affected builds not yet read from Microsoft. Check the MSRC Security Update Guide entry for CVE-2026-70240 for the KB per Windows version, then compare each domain controller's installed KB (Get-HotFix) to it.

## Timeline

- 2026-11-10T19:25:17+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-70240
- 2026-11-10T21:13:53+00:00 analyst — Could not read MSRC or NVD page (empty/JS-only; CVRF Nov 2026 too large; searches found nothing for this id). Affected builds and KB unknown; settle by opening the MSRC Security Update Guide entry for CVE-2026-70240 (Nov 2026 Patch Tuesday). Nothing verified.

## From the sources

Missing release of memory after effective lifetime in Windows Kerberos allows an unauthorized attacker to deny service over a network.

---

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