Microsoft DirectMusic: Stack-based buffer overflow enables remote code execution

Summary

A stack-based buffer overflow in the Microsoft DirectMusic component of Windows allows an unauthorized attacker to execute code over a network. The CVSS vector (AV:N/AC:L/PR:N/UI:N) indicates no privileges or user interaction are required. Exploitation details are not yet confirmed, and the NVD analysis is still pending.

Affected

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

Fixed in

• Build 10.0.14393.9688 or later (Windows 10 1607, Windows Server 2016)
• Build 10.0.17763.9487 or later (Windows 10 1809, Windows Server 2019)
• Build 10.0.19044.7846 or later (Windows 10 21H2)
• Build 10.0.19045.7846 or later (Windows 10 22H2)
• Build 10.0.22631.7711 or later (Windows 11 23H2)
• Build 10.0.26100.9974 or later (Windows 11 24H2)
• Build 10.0.26200.9974 or later (Windows 11 25H2)
• Build 10.0.28000.3501 or later (Windows 11 26H1)
• Build 10.0.26300.9974 or later (Windows 11 26H2)
• Build 10.0.20348.5870 or later (Windows Server 2022)

The KB numbers were not verified. Check the MSRC Security Update Guide for the matching cumulative update.

Workaround

Unknown.

Exploitation

• No confirmed exploitation in the sources reviewed.
• CISA SSVC assessment: Exploitation none, automatable yes, technical impact total.
• No public proof of concept found.

Our recommendation

• Confirm the affected builds and the matching KB on the MSRC advisory.
• Install the Windows cumulative update on all affected Windows endpoints and servers, starting with internet-facing and server systems.
• Identify Windows hosts reachable from the internet or untrusted networks and prioritize them.
• Monitor MSRC and the CISA KEV catalog for updates, and recheck once NVD analysis is complete.

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-2026-95882 msrc.microsoft.com
• CISA: Known Exploited Vulnerabilities catalog alert (13 Oct 2026) www.cisa.gov
• MITRE CWE-121: Stack-based Buffer Overflow cwe.mitre.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, 20:34.