CVE-2026-55004 is a Windows Print Configuration double free vulnerability that can be used for elevation of privilege. Microsoft assigns it a CVSS v3.1 base score of 7.8 (High) with a temporal score of 6.8. The vector is local, with low attack complexity, low privileges required, and no user interaction. The impact is high for confidentiality, integrity, and availability. Microsoft says it is not publicly disclosed, not exploited, and exploit code maturity is unproven. Because exploitation requires local access, enterprise risk is mainly to systems where an attacker can already run code or obtain local access.

Highlights:
- CVSS scores: Base 7.8 - Temporal 6.8
- Exploit status & code maturity: Publicly Disclosed: No; Exploited: No; Exploit Code Maturity: UNPROVEN
- Impact: Elevation of Privilege; Confidentiality: HIGH, Integrity: HIGH, Availability: HIGH
- Exploitation likelihood: Exploitation Less Likely; local attack vector, low complexity, low privileges required, and no user interaction
- Severity for enterprise: High severity, but risk is concentrated on local-access scenarios rather than remotely exposed services
- 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