CVE-2026-78452: Microsoft Windows SCSI Class System File Information Disclosure Vulnerability

mediumCVSS 4.6CVE-2026-78452

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

Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: medium — CVSS 4.6
Published: 2026-09-08
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-78452

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-784520.48% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 40% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-78452	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

mediumCVE-2026-78452: Out-of-bounds read in Microsoft Windows SCSI Class System File allows an unauthorized attacker…nvd

Recent advisories for Microsoft Windows SCSI

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

mediumCVE-2026-78453: Integer underflow (wrap or wraparound) in Microsoft Windows SCSI Class System File allows an u…nvd · 2026-09-08
mediumCVE-2026-78452: Out-of-bounds read in Microsoft Windows SCSI Class System File allows an unauthorized attacker…nvd · 2026-09-08
mediumCVE-2026-78451: Untrusted pointer dereference in Microsoft Windows SCSI Class System File allows an unauthoriz…nvd · 2026-09-08
mediumCVE-2026-78451: Microsoft Windows SCSI Class System File Elevation of Privilege Vulnerabilitymsrc · 2026-09-08
mediumCVE-2026-78453: Microsoft Windows SCSI Class System File Information Disclosure Vulnerabilitymsrc · 2026-09-08