CVE-2026-62769

Local privilege escalation via numeric truncation

Published Aug 11, 2026 · Updated Aug 25, 2026

Numeric truncation in Microsoft Windows DNS allows local users with existing access to elevate privileges on affected Windows systems. Microsoft identifies a numeric truncation error in Windows DNS but does not disclose the affected function, input, or narrowing conversion. Exploitation requires local authenticated access; successful exploitation elevates privileges, and no remote impact is reported.

CVSS severityUnavailable
Unscored
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Numeric truncation in Microsoft Windows DNS allows local users with existing access to elevate privileges on affected Windows systems. Microsoft identifies a numeric truncation error in Windows DNS but does not disclose the affected function, input, or narrowing conversion. Exploitation requires local authenticated access; successful exploitation elevates privileges, and no remote impact is reported.

The record

CVE
CVE-2026-62769
Published
Aug 11, 2026
Updated
Aug 25, 2026
Vendor
Microsoft
Product
Windows Server 2019
Classifications
CWE-197, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=10.0.17763.0 <10.0.17763.9121

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Microsoft · Windows Server 2019version=10.0.17763.0 <10.0.17763.9121
Microsoft · Windows Server 2025 (Server Core installation)version=10.0.26100.0 <10.0.26100.33296
Microsoft · Windows 11, version 25H2version=10.0.26200.0 <10.0.26200.9168
Microsoft · Windows Server 2016 (Server Core installation)version=10.0.14393.0 <10.0.14393.9418
Microsoft · Windows 11, version 24H2version=10.0.26100.0 <10.0.26100.9168
Microsoft · Windows Server 2012 (Server Core installation)version=6.2.9200.0 <6.2.9200.26280
Microsoft · Windows Server 2012version=6.2.9200.0 <6.2.9200.26280
Microsoft · Windows 10 Version 21H2version=10.0.19044.0 <10.0.19044.7663
Microsoft · Windows Server 2016version=10.0.14393.0 <10.0.14393.9418
Microsoft · Windows 10 Version 22H2version=10.0.19045.0 <10.0.19045.7663
Microsoft · Windows Server 2012 R2 (Server Core installation)version=6.3.9600.0 <6.3.9600.23338
Microsoft · Windows Server 2019 (Server Core installation)version=10.0.17763.0 <10.0.17763.9121
Microsoft · Windows 11, version 26H1version=10.0.28000.0 <10.0.28000.2704
Microsoft · Windows 11 Version 23H2version=10.0.22631.0 <10.0.22631.7517
Microsoft · Windows 10 Version 1607version=10.0.14393.0 <10.0.14393.9418
Microsoft · Windows Server 2022version=10.0.20348.0 <10.0.20348.5499
Microsoft · Windows Server 2025version=10.0.26100.0 <10.0.26100.33296
Microsoft · Windows 10 Version 1809version=10.0.17763.0 <10.0.17763.9121
Microsoft · Windows Server 2012 R2version=6.3.9600.0 <6.3.9600.23338

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-197Numeric Truncation Error
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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