CVE-2026-61920Network attack vector

Authenticated code execution via DNS race condition

Published Aug 11, 2026 · Updated Aug 25, 2026

Race condition in Windows DNS in Microsoft Windows and Windows Server allows remote authenticated users to execute code over a network. Microsoft's record identifies the flaw only as improper synchronization on a shared Windows DNS resource and also maps CWE-416, indicating a race that leaves one execution path using state after another path frees or repurposes it. Microsoft has not published the specific function or packet path; reachability therefore depends on whether high-privileged authenticated principals can send requests to the DNS service.

CVSS severityUnavailable
Unscored
EPSS probability0.48%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in Windows DNS in Microsoft Windows and Windows Server allows remote authenticated users to execute code over a network. Microsoft's record identifies the flaw only as improper synchronization on a shared Windows DNS resource and also maps CWE-416, indicating a race that leaves one execution path using state after another path frees or repurposes it. Microsoft has not published the specific function or packet path; reachability therefore depends on whether high-privileged authenticated principals can send requests to the DNS service.

The record

CVE
CVE-2026-61920
Published
Aug 11, 2026
Updated
Aug 25, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-362, CWE-416, T1210
Attack vector
network
Privileges
admin

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

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

6.6MicrosoftCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

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)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CWE-416Use After Free
T1210Exploitation of Remote Services

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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