CVE-2026-62887: Windows NTFS Information Disclosure Vulnerability

mediumCVSS 5.5CVE-2026-62887

Out-of-bounds read in Windows NTFS allows an authorized attacker to disclose information locally.

CSIRTS triage

vendor: Microsoft product: Windows NTFS Information disclosure

What: Out-of-bounds read in Windows NTFS exposes sensitive information.
Who is affected: Authorized attackers with local access to systems with NTFS volumes.
Urgency: Medium severity (CVSS 5.5) with information disclosure impact; standard patch cycle applies.
Action: Apply the latest Windows security update addressing CVE-2026-62887.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: medium — CVSS 5.5
Published: 2026-08-11
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62887

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-2026-628870.30% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 22% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-62887	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

unknownexploitedNCSC-2026-0284 [1.00] [M/H] Vulnerabilities patched in Microsoft Windowsncsc-nl
mediumCVE-2026-62887: Out-of-bounds read in Windows NTFS allows an authorized attacker to disclose information local…nvd

Recent advisories for Windows NTFS Information

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-2026-65784: Out-of-bounds read in Windows NTFS allows an authorized attacker to disclose information local…nvd · 2026-08-11
mediumCVE-2026-62887: Out-of-bounds read in Windows NTFS allows an authorized attacker to disclose information local…nvd · 2026-08-11
mediumCVE-2026-62796: Out-of-bounds read in Windows NTFS allows an authorized attacker to disclose information local…nvd · 2026-08-11
mediumCVE-2026-62793: Buffer over-read in Windows NTFS allows an authorized attacker to disclose information locally…nvd · 2026-08-11
mediumCVE-2026-61350: Buffer over-read in Windows NTFS allows an unauthorized attacker to disclose information with …nvd · 2026-08-11
mediumCVE-2026-61350: Windows NTFS Information Disclosure Vulnerabilitymsrc · 2026-08-11