ZDI-26-536: (Pwn2Own) Microsoft Windows http.sys Integer Overflow Local Privilege Escalation Vulnerability
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 ZDI has assigned a CVSS rating of 8.8. The following CVEs are assigned: CVE-2026-62735.
Affected Software
Event History
Frequently Asked Questions
What is the severity of ZDI-26-536?
The severity of ZDI-26-536 is rated 8.8 according to the CVSS.
How do I fix ZDI-26-536?
To fix ZDI-26-536, ensure that you apply the latest patches from Microsoft for the HTTP.sys component.
Who is affected by ZDI-26-536?
ZDI-26-536 affects installations of Microsoft Windows that utilize the HTTP.sys kernel driver.
What type of vulnerability is ZDI-26-536?
ZDI-26-536 is categorized as a local privilege escalation vulnerability.
What is the attack vector for ZDI-26-536?
An attacker must have the ability to execute low-privileged code on the target system to exploit ZDI-26-536.