# CVE-2026-70106: Windows Kernel heap-based buffer overflow privilege escalation

Source: https://junglewise.ai/threats/cve-2026-70106-heap-based-buffer-overflow-in-windows-kernel-allows-an-authorized  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-13. Updated: 2026-10-16  
License: CC BY 4.0 with a link back

CVE-2026-70106 · Severity: high · CVSS 7.8 · Published 2026-10-13

A heap-based buffer overflow vulnerability in the Windows Kernel allows an authenticated local attacker to gain elevated system privileges. Exploitation requires existing access to the system but can lead to complete compromise of the affected computer, enabling an attacker to install malware, steal data, or disrupt operations.

Technologies: [Microsoft Windows Kernel](https://junglewise.ai/threats/technologies/windows-kernel). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2026-70106 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-70106 being exploited in the wild.

**How severe is CVE-2026-70106?** High severity, with a CVSS score of 7.8, published 13 October 2026.

**Which products and versions are affected?** Microsoft Windows Kernel.

**Is there a fix for CVE-2026-70106?** 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-2026-70106 attacked?** It is attacked with local access, in an operating system.

**Am I affected by CVE-2026-70106?** Check whether you run Microsoft Windows Kernel. 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 in the Windows Kernel allows an authorized local attacker to corrupt kernel memory and escalate privileges. The vulnerability requires local code execution and valid credentials but does not require user interaction. Successful exploitation grants SYSTEM-level access; fixes are available from Microsoft.

## Affected products

- Microsoft Windows Kernel

## Timeline

- 2026-10-13: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70106](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70106)

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- [Microsoft Windows Kernel out-of-bounds read](https://junglewise.ai/threats/cve-2026-96058-out-of-bounds-read-in-windows-kernel-allows-an-unauthorized)
- [Windows Kernel integer underflow privilege elevation](https://junglewise.ai/threats/cve-2026-96052-integer-underflow-wrap-or-wraparound-in-windows-kernel-allows-an)
- [Windows Kernel incorrect authorization privilege escalation](https://junglewise.ai/threats/cve-2026-95988-incorrect-authorization-in-windows-kernel-allows-an-authorized)
- [Windows Kernel race condition privilege elevation](https://junglewise.ai/threats/cve-2026-94514-concurrent-execution-using-shared-resource-with-improper)
- [Microsoft Windows Kernel out-of-bounds read privilege escalation](https://junglewise.ai/threats/cve-2026-122183-out-of-bounds-read-in-windows-kernel-allows-an-authorized)