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Severity by source

Vendor (microsoft) PRIMARY
7.8 HIGH
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
vuln.today AI
7.8 HIGH

Local privilege escalation requiring an existing low-priv account (AV:L, PR:L), reliable and interaction-free (AC:L, UI:N), yielding full SYSTEM compromise (C/I/A:H, scope unchanged).

3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
4.0 AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (microsoft).

CVSS VectorVendor: microsoft

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

2
Analysis Generated
Jul 14, 2026 - 20:00 vuln.today
CVE Published
Jul 14, 2026 - 17:07 nvd
HIGH 7.8

DescriptionCVE.org

Use after free in Windows Graphics Kernel allows an authorized attacker to elevate privileges locally.

AnalysisAI

Local privilege escalation in the Windows Graphics Kernel component allows an authenticated attacker to elevate to SYSTEM by triggering a use-after-free (CWE-416) memory-corruption condition. All currently supported Windows client and server builds are affected - from Windows 10 1809 through Windows 11 26H1 and Windows Server 2019 through 2025. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Obtain low-privileged local account
Delivery
Run crafted graphics-API program
Exploit
Trigger use-after-free in Graphics Kernel
Execution
Groom freed kernel object
Persist
Corrupt kernel memory for read/write
Impact
Elevate to SYSTEM privileges

Vulnerability AssessmentAI

Exploitation Exploitation requires the attacker to already have local code-execution as a low-privileged authenticated user (CVSS PR:L) on an affected Windows build - this is a privilege-escalation bug, not a remote-entry point, so it cannot be triggered over the network or without an existing foothold. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 3.1 vector (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H, base 7.8) describes a locally-exploitable, low-complexity, low-privilege bug with total confidentiality/integrity/availability impact - the classic LPE profile. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker who has already gained a low-privileged foothold on a Windows host - for example through phishing, a compromised service account, or a malicious insider - runs a crafted program that drives the Graphics Kernel into a use-after-free, grooms the freed kernel object, and overwrites kernel structures to gain SYSTEM privileges. Given AV:L/AC:L, exploitation is local and low-complexity and requires no user interaction; no public proof-of-concept has been identified at time of analysis, but win32k/Graphics-Kernel UAF bugs are historically reliable to weaponize.
Remediation Patch available per vendor advisory - apply the Microsoft security update for CVE-2026-50493 delivered through the standard monthly cumulative update for your specific Windows build, referencing the fixed build numbers listed at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50493. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 24 hours: Conduct inventory of Windows 10, 11, and Server 2019-2025 instances; identify and flag systems running as administrative workstations, domain controllers, or data-handling servers for priority patching. …

Sign in for detailed remediation steps and compensating controls.

Threat intelligence, references, and detailed analysis are available after sign-in.

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CVE-2026-50493 vulnerability details – vuln.today

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