Patch tracker / CVE reference / CVE-2024-43455
CVE-2024-43455
Critical severity Microsoft vulnerability, CVSS 9.8. Fixed by 11 Microsoft security updates.
All about CVE-2024-43455: the Senserva AI read, whether it is exploited, the official patches, its change history, and the questions admins ask.
Which of your devices are still exposed? Find out free with a full Microsoft 365 audit.
CVE-2024-43455 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 71%. Microsoft has shipped the fix: deploy one of the 11 updates below from the Microsoft Update Catalog, and see where this CVE sits against the rest on the patch tracker.
Risk summary
Senserva AI Opinion for CVE-2024-43455
A spoofing flaw in the Windows Remote Desktop Licensing Service earns a Critical CVSS 9.8 rating here, affecting Windows Server 2019 and 2022 with EPSS at 71 percent. That score for a spoofing bug signals impact well beyond nuisance: successful attacks against licensing infrastructure can undermine trust in the RDS deployment around it. Terminal server farms are the exposed population.
Do this: Include licensing servers in your RDS patch group and verify they are not exposed beyond the RDS infrastructure.
AI-generated from public data, 2026-07-07. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for CVE-2024-43455
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Full tracking and change history for CVE-2024-43455
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 71%. CVSS 9.8 (Critical).
This CVE is among the top half of tracked Microsoft CVEs by EPSS exploit probability.
Official patch(es) for CVE-2024-43455
High priority: EPSS puts the odds of near-term exploitation high. In Intune or Defender, confirm whether the fixing updates KB5042880, KB5042881, KB5043050, KB5043051, KB5043055, KB5043087, KB5043092, KB5043125, KB5043129, KB5043135, KB5043138 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-2024-43455. Each KB page links to the Microsoft Update Catalog download for every affected product.
Affected products
Common questions about CVE-2024-43455
Is CVE-2024-43455 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 71%.
What patch fixes CVE-2024-43455?
Microsoft fixed CVE-2024-43455 in KB5042880, KB5042881, KB5043050, KB5043051, KB5043055, KB5043087, KB5043092, KB5043125, KB5043129, KB5043135, KB5043138. Download from the Microsoft Update Catalog, or let Intune, Windows Update, or WSUS deliver it.
Which products are affected by CVE-2024-43455?
Windows Server 2019, Windows Server 2019 (Server Core installation), Windows Server 2022.
Can I ask my own AI about CVE-2024-43455?
Yes. This page includes a free, ready-to-paste AI prompt containing CVE-2024-43455'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-2024-43455, 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.
