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Memory corruption

Out-of-bounds read in Windows Client for NFS allows an unauthorized attacker to disclose information over a network

CVE-2026-69940

What this means

This is rated medium severity (6.5 out of 10). There is no confirmed exploitation of it yet. Ask IT whether Microsoft Windows 10 1607, Microsoft Windows 10 1809 and Microsoft Windows 10 21h2, and 11 more are in your estate.

Full vendor description

Out-of-bounds read in Windows Client for NFS allows an unauthorized attacker to disclose information over a network.

Scoring and exploitation

6.5/ 10
CVSS 3.1 base scoreMedium

Exploitable over the network without any account, but only if a user takes an action, such as opening a file or link. High impact on confidentiality.

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Exploitability

Longer bar: easier to attack

Attack vectorNetworkAV:N
Attack complexityLowAC:L
Privileges requiredNonePR:N
User interactionRequiredUI:R
ScopeUnchangedS:U

Impact

Longer bar: more harm

ConfidentialityHighC:H
IntegrityNoneI:N
AvailabilityNoneA:N
Not reported
Exploited in the wild
Not confirmed in the
Not reported

Weaknesses

CWE-125

Affected products ()

  • Microsoft Windows 10 1607
  • Microsoft Windows 10 1809
  • Microsoft Windows 10 21h2
  • Microsoft Windows 10 22h2
  • Microsoft Windows 11 23h2
  • Microsoft Windows 11 24h2
  • Microsoft Windows 11 25h2
  • Microsoft Windows 11 26h1
  • Microsoft Windows 11 26h2
  • Microsoft Windows Server 2012
  • Microsoft Windows Server 2016
  • Microsoft Windows Server 2019
  • Microsoft Windows Server 2022
  • Microsoft Windows Server 2025
Show the raw CPE strings (26)
  • cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x64:*
  • cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:*
  • cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:*
  • cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*
  • cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:arm64:*
  • cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:x64:*
  • cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:x86:*
  • cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:arm64:*
  • cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:x64:*
  • cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:x86:*
  • cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:arm64:*
  • cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:x64:*
  • cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:arm64:*
  • cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:x64:*
  • cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:arm64:*
  • cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:x64:*
  • cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:arm64:*
  • cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:x64:*
  • cpe:2.3:o:microsoft:windows_11_26h2:*:*:*:*:*:*:arm64:*
  • cpe:2.3:o:microsoft:windows_11_26h2:*:*:*:*:*:*:x64:*
  • cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:*
  • cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*
  • cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:x64:*
  • cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:x64:*
  • cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:x64:*

Showing 25 of 26 matches from .

References

1 link from the CVE record, grouped by site; the vendor's advisory comes first.

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