Patch tracker / CVE reference / CVE-2025-3052

CVE-2025-3052

CVE-2025-3052 is a medium severity Microsoft vulnerability with a CVSS score of 6.7. Its EPSS score puts the probability of exploitation in the next 30 days at 85%. Microsoft has shipped the fix: deploy one of the 12 updates below from the Microsoft Update Catalog, and see where this CVE sits against the rest on the patch tracker.

Risk summary

Medium

6.7

CVSS

85%

EPSS, 30 days

Medium

Severity

Not in the CISA KEV catalog. EPSS exploit probability 85%. CVSS 6.7 (Medium).

This CVE is among the top 5% of tracked Microsoft CVEs by EPSS exploit probability.

Senserva AI Opinion for CVE-2025-3052

CVE-2025-3052 is a Secure Boot bypass rooted in InsydeH2O firmware that lets attackers run unsigned code before the OS loads, defeating the boot integrity chain on Windows 10 Version 1809 and Windows Server 2019 systems. It carries Severity High with a CVSS of 8.8, and while it is not in CISA KEV or tied to ransomware yet, its 81 percent EPSS score signals that working exploit code is likely circulating. A bypass at this layer can survive OS reinstalls and undermine BitLocker and other boot-dependent protections.

Do this: Apply the Microsoft security update for CVE-2025-3052 to your 1809 and Server 2019 fleet, then verify Secure Boot is enabled and the revoked bootloader hashes are enforced via the DBX update.

AI-generated from public data, 2026-07-26. Verify against the vendor advisory before acting.

Senserva AI Opinion and rich prompt for CVE-2025-3052

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-2025-3052 (source: https://senserva.com/cve/CVE-2025-3052.html, data from MSRC, CISA KEV, FIRST.org EPSS, NVD, refreshed twice a day (5 AM and 3 PM US Central)):
- CVE-2025-3052: Medium severity Microsoft vulnerability, CVSS 6.7
- EPSS 30-day exploitation probability: 85%
- Actively exploited (CISA KEV): no
- Fixed by: KB5060118, KB5060525, KB5060526, KB5060531, KB5060533, KB5060841, KB5060842, KB5060998, KB5060999, KB5061010, KB5061018, KB5061059
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 85%).

Fixed by KB5060118 and 11 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-2025-3052

High priority: EPSS puts the odds of near-term exploitation high. In Intune or Defender, confirm whether the fixing updates KB5060118, KB5060525, KB5060526, KB5060531, KB5060533, KB5060841, KB5060842, KB5060998, KB5060999, KB5061010, KB5061018, KB5061059 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-2025-3052. 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.

KB5060118 KB5060525 KB5060526 KB5060531 KB5060533 KB5060841 KB5060842 KB5060998 KB5060999 KB5061010 KB5061018 KB5061059

Scope and sources

Affected products

Fixed by the same updates

CVE-2025-33053 CVE-2025-33073 CVE-2025-33064 CVE-2025-33066 CVE-2025-33067 CVE-2025-29828 CVE-2025-33070 CVE-2025-33071

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.