CVE-2025-49716Public exploitNetwork attack vector

Domain controller crash via Netlogon RPC memory exhaustion

Published Jul 8, 2025 · Updated Feb 13, 2026

Uncontrolled resource consumption in Windows Netlogon allows remote attackers to crash affected domain controllers through unauthenticated RPC. DsrAddressToSiteNamesW accepts as many as 32,000 socket addresses per call, allocates at least 256 KB, and repeated stateless calls outpace memory release until LSASS exhausts memory. Any network path to Netlogon on an affected domain controller is sufficient; the bounded result is a domain-controller crash and authentication-service interruption.

CVSS severity7.5
High
EPSS probability1.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Uncontrolled resource consumption in Windows Netlogon allows remote attackers to crash affected domain controllers through unauthenticated RPC. DsrAddressToSiteNamesW accepts as many as 32,000 socket addresses per call, allocates at least 256 KB, and repeated stateless calls outpace memory release until LSASS exhausts memory. Any network path to Netlogon on an affected domain controller is sufficient; the bounded result is a domain-controller crash and authentication-service interruption.

The record

CVE
CVE-2025-49716
Published
Jul 8, 2025
Updated
Feb 13, 2026
Vendor
Microsoft
Product
Windows Server 2019
Classifications
CWE-400, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 8, 2025CVE publishedPublication date reported by the CVE source.
  2. Feb 13, 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?

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

  1. Affected versionversion=10.0.17763.0 <10.0.17763.7558

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Microsoft · Windows Server 2019version=10.0.17763.0 <10.0.17763.7558
Microsoft · Windows Server 2016 (Server Core installation)version=10.0.14393.0 <10.0.14393.8246
Microsoft · Windows Server 2012 (Server Core installation)version=6.2.9200.0 <6.2.9200.25573
Microsoft · Windows Server 2012version=6.2.9200.0 <6.2.9200.25573
Microsoft · Windows Server 2022, 23H2 Edition (Server Core installation)version=10.0.25398.0 <10.0.25398.1732
Microsoft · Windows Server 2016version=10.0.14393.0 <10.0.14393.8246
Microsoft · Windows Server 2008 R2 Service Pack 1version=6.1.7601.0 <6.1.7601.27820
Microsoft · Windows Server 2008 R2 Service Pack 1 (Server Core installation)version=6.1.7601.0 <6.1.7601.27820
Microsoft · Windows Server 2012 R2 (Server Core installation)version=6.3.9600.0 <6.3.9600.22676
Microsoft · Windows Server 2019 (Server Core installation)version=10.0.17763.0 <10.0.17763.7558
Microsoft · Windows Server 2008 Service Pack 2version=6.0.6003.0 <6.0.6003.23418
Microsoft · Windows Server 2022version=10.0.20348.0 <10.0.20348.3932
Microsoft · Windows Server 2012 R2version=6.3.9600.0 <6.3.9600.22676
Microsoft · Windows Server 2008 Service Pack 2 (Server Core installation)version=6.0.6003.0 <6.0.6003.23418

Published CVSS scores

7.5Microsoft CorporationCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
T1499Endpoint Denial of Service

Public exploit references

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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