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CVE-2026-62798: Win32k Information Disclosure Vulnerability

mediumCVSS 5.5CVE-2026-62798
Untrusted pointer dereference in Windows Win32K allows an authorized attacker to disclose information locally.

CSIRTS triage

vendor: Microsoftproduct: Win32kInformation disclosure
What
Untrusted pointer dereference in Win32k allows information disclosure.
Who is affected
Authorized local users on Windows systems.
Urgency
Medium severity (CVSS 5.5); information disclosure is lower priority than RCE or privilege escalation.
Action
Apply the latest Windows security update addressing CVE-2026-62798.

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-2026-62798

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.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2026-62798coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

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

Recent advisories for Win32k Information Disclosure

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.

More from Microsoft Security Response Center