Windows XWizard Framework: Heap-based buffer overflow allows local privilege escalation

Summary

A heap-based buffer overflow in the Windows XWizard Framework allows an attacker with low privileges to elevate privileges on the local system. The attack requires local access and a valid user session, so it is typically a second step after phishing or malware on a workstation. Microsoft rates the impact on confidentiality, integrity and availability as high, with a changed scope.

Affected

• Windows 10 Version 1607: 10.0.14393.0 before 10.0.14393.9688
• Windows 10 Version 1809: 10.0.17763.0 before 10.0.17763.9487
• Windows 10 Version 21H2: 10.0.19044.0 before 10.0.19044.7846
• Windows 10 Version 22H2: 10.0.19045.0 before 10.0.19045.7846
• Windows 11 Version 23H2: 10.0.22631.0 before 10.0.22631.7711
• Windows 11 Version 24H2: 10.0.26100.0 before 10.0.26100.9974
• Windows 11 Version 25H2: 10.0.26200.0 before 10.0.26200.9974
• Windows 11 Version 26H1: 10.0.28000.0 before 10.0.28000.3501
• Windows 11 Version 26H2: 10.0.26300.0 before 10.0.26300.9974
• Windows Server 2016 (including Server Core): 10.0.14393.0 before 10.0.14393.9688
• Windows Server 2019 (including Server Core): 10.0.17763.0 before 10.0.17763.9487
• Windows Server 2022: 10.0.20348.0 before 10.0.20348.5870

Fixed in

Fixed in the security update for each affected build listed above, starting with the build numbers given in the affected list. Microsoft's update guide lists the KB article numbers.

Workaround

Unknown.

Exploitation

• No known exploitation in the wild.
• CISA SSVC assessment: exploitation none, not automatable, total technical impact.
• No public proof of concept found.

Our recommendation

• Install the Windows security update for all affected builds in the next monthly update cycle, with standard priority.
• Prioritise systems still running unsupported Windows 10 builds or Windows Server 2016 and 2019 without current patches.
• Check the Windows build numbers of all endpoints and servers against the list above.
• Monitor workstations for signs of compromise, since the vulnerability is typically exploited after an initial foothold.
• Review the support status of each Windows 10 machine.

Public exploits iAttack code is publicly available (PoC on GitHub, Metasploit or Exploit-DB).

PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.

Research sources

• Microsoft Security Update Guide: CVE-2026-113760 msrc.microsoft.com
• CVE.org record CVE-2026-113760 www.cve.org

Researched and written up in English and German by an AI (Claude by Anthropic) based on NVD, CISA, EPSS and the sources listed. The vendor information is authoritative. Researched on 10 Nov 2026, 22:46.