CyberSecBulletin
CVE-2026-50697NVD status: Analyzed

Windows 10 Version 1607: Exposure of Sensitive Information to an Unauthorized Actor

Published Updated By the CyberSecBulletin desk

CVE-2026-50697 is a high-severity exposure of sensitive information to an unauthorized actor vulnerability in Windows 10 Version 1607 from Microsoft, with a CVSS 3.1 base score of 7.8 out of 10. It can be exploited with local access to the system by an attacker with a low-privileged account, without any action from a user. The record lists version 10.0.14393.9339 as the first without the flaw, so updating Windows 10 Version 1607 to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.4% chance of exploitation within 30 days, which is low compared with other CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Update Windows 10 Version 1607 to 10.0.14393.9339 or a later version.
  2. Update Windows 10 Version 1809 to 10.0.17763.9020 or a later version.
  3. Update Windows 10 Version 21H2 to 10.0.19044.7548 or a later version.
  4. Read the advisory on msrc.microsoft.com for workarounds and exact fixed builds.

Affected products and versions

VendorProductAffected versionsFixed in
MicrosoftWindows 10 Version 160710.0.14393.0 up to, but not including, 10.0.14393.933910.0.14393.9339
MicrosoftWindows 10 Version 180910.0.17763.0 up to, but not including, 10.0.17763.902010.0.17763.9020
MicrosoftWindows 10 Version 21H210.0.19044.0 up to, but not including, 10.0.19044.754810.0.19044.7548
MicrosoftWindows 10 Version 22H210.0.19045.0 up to, but not including, 10.0.19045.754810.0.19045.7548
MicrosoftWindows 11 Version 24H210.0.26100.0 up to, but not including, 10.0.26100.887510.0.26100.8875
MicrosoftWindows 11 Version 25H210.0.26200.0 up to, but not including, 10.0.26200.887510.0.26200.8875
MicrosoftWindows 11 version 26H110.0.28000.0 up to, but not including, 10.0.28000.252510.0.28000.2525
MicrosoftWindows Server 20126.2.9200.0 up to, but not including, 6.2.9200.262266.2.9200.26226
MicrosoftWindows Server 2012 (Server Core installation)6.2.9200.0 up to, but not including, 6.2.9200.262266.2.9200.26226
MicrosoftWindows Server 2012 R26.3.9600.0 up to, but not including, 6.3.9600.232916.3.9600.23291
MicrosoftWindows Server 2012 R2 (Server Core installation)6.3.9600.0 up to, but not including, 6.3.9600.232916.3.9600.23291
MicrosoftWindows Server 201610.0.14393.0 up to, but not including, 10.0.14393.933910.0.14393.9339
MicrosoftWindows Server 2016 (Server Core installation)10.0.14393.0 up to, but not including, 10.0.14393.933910.0.14393.9339
MicrosoftWindows Server 201910.0.17763.0 up to, but not including, 10.0.17763.902010.0.17763.9020
MicrosoftWindows Server 2019 (Server Core installation)10.0.17763.0 up to, but not including, 10.0.17763.902010.0.17763.9020
MicrosoftWindows Server 202210.0.20348.0 up to, but not including, 10.0.20348.538610.0.20348.5386
MicrosoftWindows Server 202510.0.26100.0 up to, but not including, 10.0.26100.3315810.0.26100.33158
MicrosoftWindows Server 2025 (Server Core installation)10.0.26100.0 up to, but not including, 10.0.26100.3315810.0.26100.33158
MicrosoftWindows 10 1607before 10.0.14393.933910.0.14393.9339
MicrosoftWindows 10 1809before 10.0.17763.902010.0.17763.9020
MicrosoftWindows 10 21h2before 10.0.19044.754810.0.19044.7548
MicrosoftWindows 10 22h2before 10.0.19045.754810.0.19045.7548
MicrosoftWindows 11 24h2before 10.0.26100.887510.0.26100.8875
MicrosoftWindows 11 25h2before 10.0.26200.887510.0.26200.8875
MicrosoftWindows 11 26h1before 10.0.28000.2269; before 10.0.28000.252510.0.28000.2269, 10.0.28000.2525

Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.

How the severity score breaks down

Attack vector
LocalThe attacker needs local access or must trick a user into running something.
Attack complexity
LowNo special conditions are needed; the attack works reliably.
Privileges required
LowA basic user account is enough.
User interaction
NoneNo action by a victim is required.
Scope
UnchangedImpact stays within the vulnerable component.
Confidentiality
HighAll data handled by the component can be read.
Integrity
HighData or code can be modified at will.
Availability
HighThe component can be taken down completely.

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. Scored by CNA (microsoft.com).

Official description

Exposure of sensitive information to an unauthorized actor in Windows Common Log File System Driver allows an authorized attacker to elevate privileges locally.

Source: the CVE record as published by its numbering authority, via NVD and CVE.org.

The underlying weakness: Exposure of Sensitive Information to an Unauthorized Actor

The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.

How developers prevent this class of flaw

  • Compartmentalize the system to have safe areas where trust boundaries can be unambiguously drawn. Do not allow sensitive data to go outside of the trust boundary and always be careful when interfacing with a compartment outside of the safe area. Ensure that appropriate compartmentalization is built into the system design, and the compartmentalization allows for and reinforces privilege separation functionality. Architects and designers should rely on the principle of least privilege to decide the appropriate time to use privileges and the time to drop privileges.

More Exposure of Sensitive Information to an Unauthorized Actor vulnerabilities (CWE-200)

Timeline

  1. CVE record published.
  2. CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
  3. Record last changed materially (score, affected products, status or references).

References

Recent Exposure of Sensitive Information to an Unauthorized Actor vulnerabilities

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