Patch tracker / CVE reference / CVE-2024-38020

CVE-2024-38020

CVE-2024-38020 is a medium severity Microsoft vulnerability with a CVSS score of 6.5. Microsoft has shipped the fix: deploy one of the 2 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

3.5%

EPSS, 30 days

Medium

Severity

Not in the CISA KEV catalog. EPSS exploit probability 3.5%. CVSS 6.5 (Medium).

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

Senserva AI Opinion for CVE-2024-38020

Outlook has a spoofing vulnerability here rated High 8.8, a meaningfully more severe rating than the other Office spoofing bugs in this batch, though its 4 percent EPSS score keeps predicted exploitation relatively low. Email client spoofing bugs are still worth taking seriously since Outlook is the most common phishing delivery point in most organizations. It is not confirmed exploited or tied to ransomware.

Do this: Patch Outlook across Office 2019 and Microsoft 365 Apps for Enterprise installs and remind users that sender spoofing can still slip past a patched client through social engineering.

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

Senserva AI Opinion and rich prompt for CVE-2024-38020

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-2024-38020 (source: https://senserva.com/cve/CVE-2024-38020.html, data from MSRC, CISA KEV, FIRST.org EPSS, NVD, refreshed twice a day (5 AM and 3 PM US Central)):
- CVE-2024-38020: Medium severity Microsoft vulnerability, CVSS 6.5
- EPSS 30-day exploitation probability: 3.5%
- Actively exploited (CISA KEV): no
- Fixed by: KB5002620, KB5002621
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.

Schedule normally

No exploitation observed: not in the CISA KEV catalog, EPSS 4%.

Fixed by KB5002620 and 1 more (by build, listed below). Download from the Microsoft Update Catalog, or deploy via Windows Update, Intune, or WSUS.

Do this now: Deploy with your normal update cycle. This page refreshes daily; the verdict changes the day the data does.

Official patch(es) for CVE-2024-38020

Lower priority: patch in your normal cycle. In Intune or Defender, confirm whether the fixing updates KB5002620, KB5002621 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-2024-38020. 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.

KB5002620 KB5002621

Scope and sources

Affected products

Fixed by the same updates

CVE-2024-38021

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.