CVE-2022-44676Network attack vector

Unauthenticated code execution via SSTP race condition

Published Dec 13, 2022 · Updated Jul 22, 2025

A race condition in Microsoft Windows SSTP allows remote attackers to execute code on an RAS server via crafted connection requests. SSTP connection-request processing accesses a shared resource without proper synchronization, but Microsoft has not disclosed the resource or competing operations. Exploitation requires no authentication or user interaction, but the attacker must reach an RAS server and win the race to run code with service privileges.

CVSS severity8.1
High
EPSS probability1.07%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A race condition in Microsoft Windows SSTP allows remote attackers to execute code on an RAS server via crafted connection requests. SSTP connection-request processing accesses a shared resource without proper synchronization, but Microsoft has not disclosed the resource or competing operations. Exploitation requires no authentication or user interaction, but the attacker must reach an RAS server and win the race to run code with service privileges.

The record

CVE
CVE-2022-44676
Published
Dec 13, 2022
Updated
Jul 22, 2025
Vendor
Microsoft
Product
Windows 10 Version 1507
Classifications
CWE-362, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 13, 2022CVE publishedPublication date reported by the CVE source.
  2. Jul 22, 2025Record 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=10.0.10240.0 <10.0.10240.19624

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Microsoft · Windows 10 Version 1507version=10.0.10240.0 <10.0.10240.19624
Microsoft · Windows Server 2019version=10.0.17763.0 <10.0.17763.3770
Microsoft · Windows 7version=6.1.0 <6.1.7601.26266
Microsoft · Windows 10 Version 21H1version=10.0.0 <10.0.19043.2364
Microsoft · Windows 8.1version=6.3.0 <6.3.9600.20721
Microsoft · Windows Server 2016 (Server Core installation)version=10.0.14393.0 <10.0.14393.5582
Microsoft · Windows 11 version 21H2version=10.0.22000.0 <10.0.22000.1335
Microsoft · Windows Server 2012 (Server Core installation)version=6.2.9200.0 <6.2.9200.24018
Microsoft · Windows Server 2012version=6.2.9200.0 <6.2.9200.24018
Microsoft · Windows 10 Version 21H2version=10.0.19044.0 <10.0.19044.2364
Microsoft · Windows Server 2016version=10.0.14393.0 <10.0.14393.5582
Microsoft · Windows Server 2008 R2 Service Pack 1version=6.1.7601.0 <6.1.7601.26266
Microsoft · Windows 10 Version 20H2version=10.0.0 <10.0.19042.2364
Microsoft · Windows Server 2008 R2 Service Pack 1 (Server Core installation)version=6.1.7601.0 <6.1.7601.26266
Microsoft · Windows 10 Version 22H2version=10.0.19045.0 <10.0.19045.2364
Microsoft · Windows Server 2012 R2 (Server Core installation)version=6.3.9600.0 <6.3.9600.20721
Microsoft · Windows Server 2019 (Server Core installation)version=10.0.17763.0 <10.0.17763.3770
Microsoft · Windows 7 Service Pack 1version=6.1.0 <6.1.7601.26266
Microsoft · Windows 11, version 22H2version=10.0.22621.0 <10.0.22621.993
Microsoft · Windows 10 Version 1607version=10.0.14393.0 <10.0.14393.5582
Microsoft · Windows Server 2008 Service Pack 2version=6.0.6003.0 <6.0.6003.21815
Microsoft · Windows Server 2022version=10.0.20348.0 <10.0.20348.1366
Microsoft · Windows 10 Version 1809version=10.0.0 <10.0.17763.3770; version=10.0.17763.0 <10.0.17763.3770
Microsoft · Windows Server 2012 R2version=6.3.9600.0 <6.3.9600.20721
Microsoft · Windows Server 2008 Service Pack 2 (Server Core installation)version=6.0.6003.0 <6.0.6003.21815

Published CVSS scores

8.1MicrosoftCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/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 exploitUnconfirmed

Weakness, pattern, technique

CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
T1190Exploit Public-Facing Application

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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