# CVE-2026-105558: Windows Deployment Services heap-based buffer overflow

Source: https://junglewise.ai/threats/cve-2026-105558-heap-based-buffer-overflow-in-windows-deployment-services-allows  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-10. Updated: 2026-11-10  
License: CC BY 4.0 with a link back

CVE-2026-105558 · Severity: high · CVSS 7.5 · Published 2026-11-10

Windows Deployment Services, a Microsoft system used to deploy Windows operating systems over a network, contains a heap-based buffer overflow vulnerability. An authorized attacker on the network could exploit this to execute arbitrary code with elevated privileges on the affected server.

Technologies: [Microsoft Windows Deployment Services](https://junglewise.ai/threats/technologies/windows-deployment-services). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2026-105558 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-105558 being exploited in the wild.

**How severe is CVE-2026-105558?** High severity, with a CVSS score of 7.5, published 10 November 2026.

**Which products and versions are affected?** Microsoft Windows Deployment Services.

**Is there a fix for CVE-2026-105558?** 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-2026-105558 attacked?** It is attacked over the network, in an operating system.

**Am I affected by CVE-2026-105558?** Check whether you run Microsoft Windows Deployment Services. 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 heap-based buffer overflow exists in Windows Deployment Services that allows network-based code execution. The vulnerability requires an attacker to be authorized/authenticated to access the service and communicate over the network; no user interaction is needed. Successful exploitation grants code execution on the target system.

## Affected products

- Microsoft Windows Deployment Services

## Timeline

- 2026-11-10: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-105558](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-105558)

## Related threats

- [Windows Deployment Services use-after-free code execution](https://junglewise.ai/threats/cve-2026-119951-use-after-free-in-windows-deployment-services-allows-an)
- [Windows Deployment Services relative path traversal](https://junglewise.ai/threats/cve-2026-118213-relative-path-traversal-in-windows-deployment-services-allows-an)
- [Windows Deployment Services relative path traversal information disclosure](https://junglewise.ai/threats/cve-2026-113818-relative-path-traversal-in-windows-deployment-services-allows-an)
- [Windows Deployment Services privilege management information disclosure](https://junglewise.ai/threats/cve-2026-112977-improper-privilege-management-in-windows-deployment-services)
- [Microsoft Windows Deployment Services race condition remote code execution](https://junglewise.ai/threats/cve-2026-88174-concurrent-execution-using-shared-resource-with-improper)