# CVE-2026-34342: Microsoft Windows Print Spooler race condition privilege escalation

Source: https://junglewise.ai/threats/cve-2026-34342-microsoft-windows-print-spooler-race-condition-privilege  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-05-12. Updated: 2026-05-14  
License: CC BY 4.0 with a link back

CVE-2026-34342 · Severity: high · CVSS 7 · Published 2026-05-12

A security vulnerability exists in the Windows Print Spooler, the service responsible for managing print jobs on Microsoft Windows systems. An attacker who already has basic access to a computer could exploit a timing flaw to gain full administrative control over the device. This could allow them to view sensitive data, install malicious software, or disrupt business operations.

Technologies: [Microsoft Windows Print Spooler Components](https://junglewise.ai/threats/technologies/windows-print-spooler). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2026-34342 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-34342 being exploited in the wild.

**How severe is CVE-2026-34342?** High severity, with a CVSS score of 7, published 12 May 2026.

**Which products and versions are affected?** Microsoft Windows Print Spooler Components.

**Is there a fix for CVE-2026-34342?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-34342 attacked?** It is attacked with local access, in an operating system.

**Am I affected by CVE-2026-34342?** Check whether you run Microsoft Windows Print Spooler Components. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A race condition (CWE-362) exists within the Windows Print Spooler Components due to improper synchronization when handling shared resources. The vulnerability requires the attacker to have local access with low privileges (PR:L) and involves a high level of complexity (AC:H) to successfully time the exploit. If successful, the attacker can achieve elevated privileges, potentially reaching SYSTEM-level access, leading to a total compromise of confidentiality, integrity, and availability on the affected host. Microsoft has released security updates to address this issue.

## Affected products

- Microsoft Windows Print Spooler Components

## Timeline

- 2026-05-12: disclosed
- 2026-05-12: advisory

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-34342](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-34342)