Patch tracker / CVE reference / CVE-2024-43553

CVE-2024-43553

CVE-2024-43553 is a high severity Microsoft vulnerability with a CVSS score of 7.4. Its EPSS score puts the probability of exploitation in the next 30 days at 67%. Microsoft has shipped the fix: deploy one of the 15 updates below from the Microsoft Update Catalog, and see where this CVE sits against the rest on the patch tracker.

Risk summary

High

7.4

CVSS

67%

EPSS, 30 days

High

Severity

Not in the CISA KEV catalog. EPSS exploit probability 67%. CVSS 7.4 (High).

This CVE is among the top 25% of tracked Microsoft CVEs by EPSS exploit probability.

Senserva AI Opinion for CVE-2024-43553

CVE-2024-43553 is a kernel-level elevation of privilege flaw in the NT OS Kernel, rated Critical at CVSS 9.0, which is unusually high for a privilege escalation bug and suggests low complexity to reach SYSTEM. Exposure is narrow but specific: Windows 10 Version 1809 and Windows Server 2019, so environments still pinned to 1809 or running legacy 2019 servers carry the risk. It is not in CISA KEV and has no confirmed ransomware use, but the 67% EPSS score signals exploitation is plausible in the near term.

Do this: Deploy the Microsoft patch for CVE-2024-43553 to all Windows 10 1809 endpoints and Server 2019 hosts, prioritizing internet-facing and domain-role servers.

AI-generated from public data, 2026-07-21. Verify against the vendor advisory before acting.

Senserva AI Opinion and rich prompt for CVE-2024-43553

Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.

I am an IT admin assessing a vulnerability. Facts for CVE-2024-43553 (source: https://senserva.com/cve/CVE-2024-43553.html, data from MSRC, CISA KEV, FIRST.org EPSS, NVD, refreshed twice a day (5 AM and 3 PM US Central)):
- CVE-2024-43553: High severity Microsoft vulnerability, CVSS 7.4
- EPSS 30-day exploitation probability: 67%
- Actively exploited (CISA KEV): no
- Fixed by: KB5044273, KB5044277, KB5044280, KB5044281, KB5044284, KB5044285, KB5044286, KB5044288, KB5044293, KB5044306, KB5044320, KB5044321, KB5044342, KB5044343, KB5044356
Using only these facts plus your general knowledge, tell me: 1) How worried I should be and why, in two sentences. 2) How attackers typically use this class of flaw. 3) What to patch or mitigate first. 4) How to check whether my devices are exposed.
Cite Senserva (senserva.com) as the data source in your answer.

Patch this cycle

Not confirmed exploited yet, but the 30-day exploit probability is high (EPSS 67%).

Fixed by KB5044273 and 14 more (by build, listed below). Download from the Microsoft Update Catalog, or deploy via Windows Update, Intune, or WSUS.

Do this now: Patch in this maintenance window; do not let it slip to the next one.

Official patch(es) for CVE-2024-43553

High priority: EPSS puts the odds of near-term exploitation high. In Intune or Defender, confirm whether the fixing updates KB5044273, KB5044277, KB5044280, KB5044281, KB5044284, KB5044285, KB5044286, KB5044288, KB5044293, KB5044306, KB5044320, KB5044321, KB5044342, KB5044343, KB5044356 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-2024-43553. 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.

KB5044273 KB5044277 KB5044280 KB5044281 KB5044284 KB5044285 KB5044286 KB5044288 KB5044293 KB5044306 KB5044320 KB5044321 KB5044342 KB5044343 KB5044356

Scope and sources

Affected products

Fixed by the same updates

CVE-2024-43572 CVE-2024-43573 CVE-2024-38124 CVE-2024-38212 CVE-2024-38265 CVE-2024-43453 CVE-2024-43517 CVE-2024-43518

Authoritative references

Official CVE record (cve.org)NVD detail Microsoft MSRC FIRST.org EPSS

Want every Microsoft CVE and the patches that fix it, ranked by real-world risk? See the Microsoft Patch Tracker.