CVE-2026-54132: Windows Kernel Elevation of Privilege Vulnerability

mediumCVSS 6.8CVE-2026-54132

Heap-based buffer overflow in Windows Kernel allows an unauthorized attacker to elevate privileges with a physical attack.

CSIRTS triage

vendor: Microsoft product: Windows Kernel Privilege escalation

What: Heap-based buffer overflow in Windows Kernel allows an unauthorized attacker to elevate privileges with a physical attack.
Who is affected: Deployments of Windows Kernel that are vulnerable to this issue.
Urgency: Remediation is medium urgency due to the potential for privilege escalation, but exploitation requires physical access.
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-2026-54132

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-2026-541320.30% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 23% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-54132	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

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

unknownexploitedNCSC-2026-0231 [1.00] [M/H] Vulnerabilities fixed in Microsoft Windowsncsc-nl
mediumCVE-2026-54132: Heap-based buffer overflow in Windows Kernel allows an unauthorized attacker to elevate privil…nvd

Recent advisories for Windows Kernel 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-2026-58532: Integer overflow or wraparound in Windows Kernel allows an authorized attacker to elevate priv…nvd · 2026-07-14
highCVE-2026-56644: Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally.nvd · 2026-07-14
highCVE-2026-56643: Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally.nvd · 2026-07-14
highCVE-2026-50688: Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally.nvd · 2026-07-14
highCVE-2026-50687: Use after free in Windows Kernel allows an authorized attacker to elevate privileges locally.nvd · 2026-07-14
highCVE-2026-50673: Null pointer dereference in Windows Kernel allows an authorized attacker to elevate privileges…nvd · 2026-07-14