CVE-2026-58609 is an Out-of-bounds Read in the Windows Graphics Component that can lead to Remote Code Execution. Microsoft rates it CVSS v3.1 base 7.8 (High) with a temporal score of 6.8. The vector is LOCAL, LOW attack complexity, NO privileges required, and user interaction is REQUIRED. Exploit status shows no public disclosure and no known exploitation, with exploit code maturity UNPROVEN. Because the attack is local and requires user interaction, enterprise risk is lower for network-exposed services than it would be for a network-reachable, no-interaction issue, but it remains relevant for systems where users can be induced to open content that triggers the flaw.

Highlights:
- CVSS scores: Base 7.8 - Temporal 6.8
- Exploit status & code maturity: Publicly Disclosed: No; Exploited: No; Exploit Code Maturity: UNPROVEN
- Impact: Remote Code Execution with HIGH confidentiality, integrity, and availability impacts
- Exploitation likelihood: Exploitation Unlikely; vector context is LOCAL, LOW attack complexity, NO privileges required, and user interaction REQUIRED
- Severity for enterprise: High CVSS severity, but lower exposure than network-based issues because exploitation is local and requires user interaction; most relevant on endpoints and systems where users can run or open untrusted content
- Patch status: available; customer action required

Affected systems:
- Windows 10 1607
- Windows 10 1809
- Windows 10 21H2
- Windows 10 22H2
- Windows 11 24H2
- Windows 11 25H2
- Windows 11 26H1
- Windows 11 unspecified
- Windows Server 2012
- Windows Server 2012 R2
- Windows Server 2016
- Windows Server 2019
- Windows Server 2022
- Windows Server 2025