Microsoft Windows 10 1607: Privilege escalation in CD-ROM driver

Summary

A type confusion flaw (CWE-843) in the Windows CD-ROM driver allows an authorized local user to elevate privileges. Windows Server 2016 is also listed as affected. The attacker needs an existing low-privilege local account or foothold, and Microsoft rates the impact on confidentiality, integrity and availability as high (CVSS 3.1: 7.8). Microsoft reports no public disclosure and no known exploitation.

Affected

• Windows 10 Version 1607 (x64 and x86): 10.0.14393.0 to below 10.0.14393.9612
• Windows Server 2016: 10.0.14393.0 to below 10.0.14393.9612
• Windows 10 Version 1809: 10.0.17763.0 to below 10.0.17763.9376
• Windows 10 Version 21H2: 10.0.19044.0 to below 10.0.19044.7807
• Windows 10 Version 22H2: 10.0.19045.0 to below 10.0.19045.7807
• Windows 11 Version 23H2: 10.0.22631.0 to below 10.0.22631.7652
• Windows 11 Version 24H2: 10.0.26100.0 to below 10.0.26100.9711
• Windows 11 Version 25H2: 10.0.26200.0 to below 10.0.26200.9711
• Windows 11 Version 26H1: 10.0.28000.0 to below 10.0.28000.3231
• Windows 11 Version 26H2: 10.0.26300.0 to below 10.0.26300.9711
• Windows Server 2012 and 2012 R2 (including Server Core): 6.2.9200.0 to below 6.2.9200.26434 and 6.3.9600.0 to below 6.3.9600.23470

Fixed in

• Windows 10 Version 1607 and Windows Server 2016: build 10.0.14393.9612 or later
• Windows 10 Version 1809: build 10.0.17763.9376 or later
• Windows 10 Version 21H2: build 10.0.19044.7807 or later
• Windows 10 Version 22H2: build 10.0.19045.7807 or later
• Windows 11 Version 23H2: build 10.0.22631.7652 or later
• Windows 11 Version 24H2 and 25H2, and Version 26H2: build 10.0.26100.9711, 10.0.26200.9711 or 10.0.26300.9711 or later
• Windows 11 Version 26H1: build 10.0.28000.3231 or later
• Windows Server 2012: build 6.2.9200.26434 or later
• Windows Server 2012 R2: build 6.3.9600.23470 or later
• KB number: Unknown. Check the MSRC page.

Workaround

• Unknown from Microsoft. The advisory is patch-based.
• Secondary guidance (not from Microsoft): remove or disable unused CD-ROM hardware, or unload the CD-ROM driver in Device Manager.
• Restrict local logons and standard user accounts on remaining systems.

Exploitation

• Publicly disclosed: No (Microsoft)
• Exploited: No (Microsoft)
• Microsoft exploitability assessment: Exploitation Less Likely
• Not listed in CISA KEV (per OpenCVE)
• EPSS: about 0.3% (aggregator data, may change)
• No public proof of concept found; keep monitoring.

Our recommendation

• Inventory all Windows 10 1607 and Server 2016 systems and plan retirement or upgrade. Verify their end-of-support status on Microsoft's lifecycle page and check whether an ESU option applies.
• Where still in use, install the update with build 10.0.14393.9612 or later and confirm the KB on the MSRC page.
• Remove unneeded CD-ROM hardware or disable the driver where practical.
• Limit local accounts and privileges on remaining legacy systems.
• Priority: medium for SMEs still running 1607; low for fully patched modern Windows systems.

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-2026-85377 msrc.microsoft.com
• Microsoft Security Update Guide (en-US): CVE-2026-85377 msrc.microsoft.com
• NVD mirror via Vulners: CVE-2026-85377 vulners.com
• OpenCVE: CVE-2026-85377 app.opencve.io
• Rapid7 via Vulners: CVE-2026-85377 vulners.com

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 2 Nov 2026, 02:14.