Patch tracker / CVE reference / CVE-2024-43487

CVE-2024-43487

CVE-2024-43487 is a medium severity Microsoft vulnerability with a CVSS score of 6.5. Its EPSS score puts the probability of exploitation in the next 30 days at 52%. Microsoft has shipped the fix: deploy one of the 6 updates below from the Microsoft Update Catalog, and see where this CVE sits against the rest on the patch tracker.

Risk summary

Medium

6.5

CVSS

52%

EPSS, 30 days

Medium

Severity

Not in the CISA KEV catalog. EPSS exploit probability 52%. CVSS 6.5 (Medium).

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

Senserva AI Opinion for CVE-2024-43487

Mark of the Web is the flag Windows uses to warn users before opening files downloaded from the internet, and this Critical 9.8 flaw with a 71 percent EPSS score lets an attacker bypass that warning on Windows 10 1809 and Server 2019. Defeating Mark of the Web is a common technique used to smuggle malicious files past a user's guard, so this bypass matters more than its category name suggests. It has not been confirmed exploited or tied to ransomware yet, but that combination of high severity and high EPSS is worth acting on.

Do this: Patch affected systems and keep Mark of the Web protections and any attachment scanning in place as defense in depth.

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

Senserva AI Opinion and rich prompt for CVE-2024-43487

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-2024-43487 (source: https://senserva.com/cve/CVE-2024-43487.html, data from MSRC, CISA KEV, FIRST.org EPSS, NVD, refreshed twice a day (5 AM and 3 PM US Central)):
- CVE-2024-43487: Medium severity Microsoft vulnerability, CVSS 6.5
- EPSS 30-day exploitation probability: 52%
- Actively exploited (CISA KEV): no
- Fixed by: KB5043050, KB5043051, KB5043064, KB5043083, KB5043125, KB5043138
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 52%).

Fixed by KB5043050 and 5 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-2024-43487

High priority: EPSS puts the odds of near-term exploitation high. In Intune or Defender, confirm whether the fixing updates KB5043050, KB5043051, KB5043064, KB5043083, KB5043125, 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-2024-43487. 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.

KB5043050 KB5043051 KB5043064 KB5043083 KB5043125 KB5043138

Scope and sources

Affected products

Fixed by the same updates

CVE-2024-43461 CVE-2024-38014 CVE-2024-38217 CVE-2024-43491 CVE-2024-38260 CVE-2024-43455 CVE-2024-21416 CVE-2024-38045

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.