(Pwn2Own) Microsoft Windows ipt.sys Incorrect Permission Assignment Local Privilege Escalation Vulnerability

August 11th, 2026
ZDI-26-539 ZDI-CAN-31260

CVE ID

CVE-2026-65773

CVSS Score

7.8 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Vendors

Microsoft

Affected Products

Windows

Vulnerability Details

This vulnerability allows local attackers to escalate privileges on affected installations of Microsoft Windows. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability.

The specific flaw exists within the ipt.sys driver. The issue results from incorrect permissions on a registry key. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of SYSTEM.

Additional Details

Microsoft has issued an update to correct this vulnerability. More details can be found at:
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-65773

Disclosure Timeline

  • 2026-05-21 - Vulnerability reported to vendor
  • 2026-08-11 - Coordinated public release of advisory
  • 2026-08-11 - Advisory Updated

Credit

Angelboy (@scwuaptx) from DEVCORE Research Team and TwinkleStar03 (@_twinklestar03), working with DEVCORE Internship Program

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