# CVE-2026-35415: Microsoft Windows integer overflow in Storage Spaces Controller

Source: https://junglewise.ai/threats/cve-2026-35415-microsoft-windows-integer-overflow-in-storage-spaces-controller  
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-2026-35415 · Severity: high · CVSS 7.8 · Published 2026-05-12

A security vulnerability exists in the Windows Storage Spaces Controller, a component used by Windows to manage and group physical disks into virtual drives. An attacker who already has basic access to a computer could exploit this flaw to gain full administrative control over the system. This could lead to the theft of sensitive data, the installation of malicious software, or the disruption of business operations.

Technologies: [Microsoft Windows Storage Spaces Controller](https://junglewise.ai/threats/technologies/windows-storage-spaces-controller). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2026-35415 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-35415 being exploited in the wild.

**How severe is CVE-2026-35415?** High severity, with a CVSS score of 7.8, published 12 May 2026.

**Which products and versions are affected?** Microsoft Windows Storage Spaces Controller.

**Is there a fix for CVE-2026-35415?** 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-2026-35415 attacked?** It is attacked with local access, in an operating system.

**Am I affected by CVE-2026-35415?** Check whether you run Microsoft Windows Storage Spaces Controller. 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

An integer overflow (CWE-190) exists within the Windows Storage Spaces Controller. The vulnerability is triggered when the component improperly handles specific integer calculations, leading to a wraparound condition. A locally authenticated attacker with low privileges can exploit this flaw by sending specially crafted requests to the controller. Successful exploitation allows the attacker to execute code with elevated system privileges, bypassing standard security boundaries. Microsoft has released security updates to address this issue; users should apply the latest Windows updates to mitigate the risk.

## Affected products

- Microsoft Windows Storage Spaces Controller

## Timeline

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

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-35415](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-35415)

## Related threats

- [Windows Storage Spaces Controller use-after-free privilege escalation](https://junglewise.ai/threats/cve-2026-69575-windows-storage-spaces-controller-use-after-free-privilege)
- [Microsoft Windows Storage Spaces Controller out-of-bounds read](https://junglewise.ai/threats/cve-2026-69568-microsoft-windows-storage-spaces-controller-out-of-bounds-read)