CVE intelligence

CVE-2026-78452

Vulnerability intelligence

Published Sep 8, 2026Sources checked Oct 28, 2026

4.6MEDIUMCVSS out of 10

What this means

Review the available evidence

CVE-2026-78452 and is rated Medium severity with a CVSS score of 4.6. It is not in the current CISA KEV record we collected. That does not prove exploitation has not occurred.

What to do next

Remediation and response

Microsoft Security Response Center guidance

Vendor revision: Sep 8, 2026

Vendor remediation details

Install KB5122876. Install KB5122882. Install KB5122878. Install KB5122871. Install KB5124008. Install KB5122880. Install KB5124012.

Vendor-listed releases

10.0.17763.9245
10.0.20348.5622
10.0.19044.7725
10.0.19045.7725
10.0.26100.33438
10.0.26200.9445
10.0.22631.7582
10.0.26100.9445
10.0.28000.2954

CISA KEVNot listedBased on the latest collected catalog

EPSS0.5%Estimated 30-day exploitation probability

Ransomware useNot markedCISA KEV ransomware field

Threat actors0Source-linked actor relationships

Overview

What is CVE-2026-78452?

Out-of-bounds read in Microsoft Windows SCSI Class System File allows an unauthorized attacker to disclose information with a physical attack.

Source: NVD