Patch tracker / CVE reference / CVE-2024-43640
CVE-2024-43640
CVE-2024-43640 is a critical severity Microsoft vulnerability with a CVSS score of 9.8. Its EPSS score puts the probability of exploitation in the next 30 days at 82%. Microsoft has shipped the fix: deploy one of the 4 updates below from the Microsoft Update Catalog, and see where this CVE sits against the rest on the patch tracker.
Critical severity Microsoft vulnerability, CVSS 9.8. Fixed by 4 Microsoft security updates.
Risk summary
Updated July 24, 2026. Data refreshed on every build from MSRC, CISA KEV, and FIRST EPSS.
Senserva AI Opinion for CVE-2024-43640
CVE-2024-43640 is a kernel-mode driver elevation of privilege flaw in Windows Server 2022 and Windows 10 Version 21H2, rated Severity Critical at CVSS 9.8. What stands out is the 82 percent EPSS score paired with a kernel driver as the target, which means successful exploitation gives attackers SYSTEM-level control on the host. It is not yet in CISA KEV and has no confirmed ransomware use, but the high exploit probability suggests a working exploit is likely near.
Do this: Deploy the Microsoft patch for CVE-2024-43640 to all Windows Server 2022 and Windows 10 21H2 systems this week, prioritizing domain controllers and internet-facing servers.
AI-generated from public data, 2026-07-23. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for CVE-2024-43640
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Full tracking and change history for CVE-2024-43640
Published and last-revised dates are authoritative, from Microsoft MSRC (or the CISA KEV date-added). Senserva additionally records day-to-day changes from 2026-07-07, refreshed several times a day; the change count reflects that forward-only tracking.
Exploitation and severity
Not in the CISA KEV catalog. EPSS exploit probability 82%. CVSS 9.8 (Critical).
This CVE is among the top 10% of tracked Microsoft CVEs by EPSS exploit probability.
Official patch(es) for CVE-2024-43640
High priority: EPSS puts the odds of near-term exploitation high. In Intune or Defender, confirm whether the fixing updates KB5046613, KB5046616, KB5046633, KB5046698 are installed across the affected products. Senserva does this automatically across your tenant and flags every missing patch.
Apply the Microsoft security updates below to fix CVE-2024-43640. Each KB page carries the Microsoft Update Catalog download, Microsoft's known issues for the update, a copy-paste PowerShell check for whether it is installed, and the Senserva AI read.
Affected products
Common questions about CVE-2024-43640
Is CVE-2024-43640 actively exploited?
It is not currently listed in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score puts the probability of exploitation in the next 30 days at 82%.
What patch fixes CVE-2024-43640?
Microsoft fixed CVE-2024-43640 in KB5046613, KB5046616, KB5046633, KB5046698. Download from the Microsoft Update Catalog, or let Intune, Windows Update, or WSUS deliver it.
Which products are affected by CVE-2024-43640?
Windows 10 Version 21H2 for 32-bit Systems, Windows Server 2022, Windows Server 2022 (Server Core installation).
Can I ask my own AI about CVE-2024-43640?
Yes. This page includes a free, ready-to-paste AI prompt containing CVE-2024-43640's key facts: severity, CVSS, EPSS exploit probability, CISA KEV status, and the fixing KB. Copy it into Claude, ChatGPT, or Copilot for a triage plan; the data is refreshed three times a day (5 AM, 12:30 PM, and 7 PM US Central).
Fixed by the same updates
If you are patching CVE-2024-43640, the same updates also fix these:
Authoritative references
Want every Microsoft CVE and the patches that fix it, ranked by real-world risk? See the Microsoft Patch Tracker.
