Executive brief
A security vulnerability exists in the Windows Print Spooler, the component responsible for managing print jobs on Windows computers and servers. An authorized user with basic access to a system could exploit this flaw to view sensitive information that should normally be protected. While this does not allow for remote attacks over the internet, it could be used by an insider or a malicious program already on the machine to compromise data privacy.
Technical details
A buffer over-read vulnerability (CWE-126) exists in the Microsoft Windows Print Spooler components. The flaw is triggered when the spooler service improperly handles memory during print job processing, allowing a locally authenticated attacker with low privileges to read data outside of the intended buffer. This can lead to the disclosure of sensitive information from the system's memory. The attack requires local access to the target machine but no user interaction. Microsoft has released security updates to address this issue across affected versions of Windows 10, Windows 11, and Windows Server.
Affected products
- Microsoft Windows 10 Version 1809 10.0.17763.0 to 10.0.17763.9020
- Microsoft Windows 10 Version 21H2 10.0.19044.0 to 10.0.19044.7548
- Microsoft Windows 10 Version 22H2 10.0.19045.0 to 10.0.19045.7548
- Microsoft Windows 11 Version 24H2 10.0.26100.0 to 10.0.26100.8875
- Microsoft Windows 11 Version 25H2 10.0.26200.0 to 10.0.26200.8875
- Microsoft Windows 11 version 26H1 10.0.28000.0 to 10.0.28000.2269
- Microsoft Windows Server 2019 10.0.17763.0 to 10.0.17763.9020
- Microsoft Windows Server 2022 10.0.20348.0 to 10.0.20348.5386
Timeline
- 2026-07-14: disclosed: Initial publication by Microsoft and NVD
- 2026-07-14: advisory