CVE-2026-50298: Windows Spaceport.sys Elevation of Privilege Vulnerability

mediumCVSS 6.8CVE-2026-50298

Integer overflow or wraparound in Windows Spaceport.sys allows an unauthorized attacker to elevate privileges with a physical attack.

CSIRTS triage

vendor: Microsoft product: Windows Privilege escalation

What: Integer overflow or wraparound in Windows Spaceport.sys allows an unauthorized attacker to elevate privileges with a physical attack.
Who is affected: Deployments of Windows with Spaceport.sys.
Urgency: Remediation is medium urgency due to the potential for local privilege escalation.
Action: Apply the latest security updates from Microsoft.

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 6.8
Published: 2026-07-14
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50298

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-2026-502980.33% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 25% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-50298	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

critical[NEW] [critical] Microsoft Windows products: Multiple vulnerabilitiescert-bund
unknownexploitedNCSC-2026-0231 [1.00] [M/H] Vulnerabilities fixed in Microsoft Windowsncsc-nl
mediumCVE-2026-50298: Integer overflow or wraparound in Windows Spaceport.sys allows an unauthorized attacker to ele…nvd

Recent advisories for Windows Spaceport.sys Elevation

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.

highCVE-2026-50333: Missing authentication for critical function in Windows Spaceport.sys allows an authorized att…nvd · 2026-07-14
mediumCVE-2026-50298: Integer overflow or wraparound in Windows Spaceport.sys allows an unauthorized attacker to ele…nvd · 2026-07-14
highCVE-2026-50333: Windows Spaceport.sys Elevation of Privilege Vulnerabilitymsrc · 2026-07-14