Patch tracker / CVE reference / CVE-2024-43456

CVE-2024-43456

CVE-2024-43456 is a Microsoft vulnerability with a CVSS score of 9.0 (Critical). Its EPSS score puts the probability of exploitation in the next 30 days at 67%. Microsoft has shipped the fix: deploy one of the 8 updates below from the Microsoft Update Catalog, and see where this CVE sits against the rest on the patch tracker.

Our data comes from Microsoft, CISA and other public sources, and it can be wrong or out of date. If you are unsure, check the linked source before you act, and tell us when we are wrong so we can fix it.

Risk summary

Critical

9.0

CVSS v3

67%

EPSS, 30 days

Critical

Severity

Not in the CISA KEV catalog. EPSS exploit probability 67%. CVSS 9.0 (Critical).

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

Senserva AI Opinion for CVE-2024-43456

CVE-2024-43456 is a Critical (CVSS 9.0) tampering flaw in Windows Remote Desktop Services affecting Windows Server 2019 (including Server Core) and Windows Server 2022. What stands out is the 67 percent EPSS score paired with a tampering class bug: RDS tampering can let an attacker alter session or authentication data rather than just read it, and any server exposing RDS to reachable networks is in scope. It is not in CISA KEV and has no confirmed ransomware use yet, but the exploit probability is high enough to treat as near term.

Do this: Apply Microsoft's patch to all Windows Server 2019 and 2022 hosts running Remote Desktop Services, prioritizing any internet-facing RDS gateways.

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

Senserva AI Opinion and rich prompt for CVE-2024-43456

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-2024-43456 (source: https://senserva.com/cve/CVE-2024-43456.html, data from MSRC, CISA KEV, FIRST.org EPSS, NVD, refreshed daily (early morning US Central)):
- CVE-2024-43456: Microsoft vulnerability, CVSS 9.0 (Critical)
- EPSS 30-day exploitation probability: 67%
- Actively exploited (CISA KEV): no
- Fixed by: KB5044277, KB5044281, KB5044288, KB5044293, 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 KB5044277 and 7 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-2024-43456

High priority: EPSS puts the odds of near-term exploitation high. In Intune or Defender, confirm whether the fixing updates KB5044277, KB5044281, KB5044288, KB5044293, 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-2024-43456. 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.

KB5044277 KB5044281 KB5044288 KB5044293 KB5044321 KB5044342 KB5044343 KB5044356

Scope and sources

Affected products

Fixed by the same updates

CVE-2024-43572 CVE-2024-43573 CVE-2024-37976 CVE-2024-37979 CVE-2024-37982 CVE-2024-37983 CVE-2024-38124 CVE-2024-43500

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.