Industrial
CVE-2026-21246
HIGH
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain
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AccessAuthenticate as local user
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ExploitSupply malicious graphics file
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ExecutionTrigger heap buffer overflow in Graphics Component
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ImpactAchieve privilege escalation to SYSTEM
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A06:2021 - Vulnerable and Outdated Components
ASVS 5.0
V15 - Secure Coding and Architecture Heap buffer bounds checking
MITRE ATT&CK
1 technique across 1 tactic: Execution The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Exploitation Conditions | Authenticated local user account required. Microsoft Graphics Component must process untrusted graphics files. Exploitation occurs without user interaction during file parsing by the vulnerable component. |
| Impact | CVSS 7.8 (HIGH). Attack vector: Local. Complexity: Low. Privileges required: Low. User interaction: None. Exploitable via local access. |
| Exploit ScenarioDerived | An attacker could exploit this vulnerability to compromise the affected system. |
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Alert meAnalysisAIv1 – Mar 12, 2026
Privilege escalation in Microsoft Graphics Component on Windows 11 24H2 and Windows 10 21H2 exploits a heap buffer overflow to allow authenticated local attackers to gain system-level access. The vulnerability requires local access and user interaction is not required, presenting a significant risk in multi-user environments. No patch is currently available.
Earlier versions of this analysis (1)
Heap-based buffer overflow in Microsoft Graphics Component allows an authorized attacker to elevate privileges locally. [CVSS 7.8 HIGH]
RemediationAI
Monitor vendor advisories for a patch. Enable ASLR, DEP/NX, and stack canaries where possible.
Affected Packages
Source: OSV (Open Source Vulnerabilities)
Affects your stack
Affects 14 packages in microsoft
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
Classified as CWE-122 (Heap-based Buffer Overflow). Affects the Microsoft Graphics component of Windows 10 1607. Heap-based buffer overflow in Microsoft Graphics Component allows an authorized attacker to elevate privileges locally.
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Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
DescriptionCVE.org
Heap-based buffer overflow in Microsoft Graphics Component allows an authorized attacker to elevate privileges locally.
Executive ViewAI
A critical privilege escalation vulnerability exists in Microsoft Graphics Component that allows authorized users to gain elevated system access. While currently unpatched, this poses immediate risk to organizations where user account compromise or insider threats could lead to full system control, particularly in environments with sensitive data or critical operations.
Implement strict user access controls and account monitoring; disable or restrict Microsoft Graphics Component features where possible; apply network segmentation to limit lateral movement from compromised accounts; enable enhanced logging on affected systems; restrict administrative privileges; consider application whitelisting to prevent malicious process execution post-exploitation.
Threat Intelligence Overview
NVD
CVE.org
EPSS
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
A buffer overflow occurs when a program writes more data to a memory buffer than it was allocated to hold, causing the excess data to spill into adjacent memory regions.
A heap overflow occurs when a program writes data beyond the bounds of a buffer allocated in the heap memory region.
Affected Products (CPE)CVE.org
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