CVE-2022-37958Network attack vector

Pre-authentication code execution through NEGOEX negotiation

Published Sep 13, 2022 · Updated Mar 11, 2025

Remote code execution in Windows NEGOEX allows remote attackers to run arbitrary code through pre-authentication negotiation messages. The flaw resides in SPNEGO's NEGOEX processing, but Microsoft and IBM have not disclosed the erroneous operation on message data. Any Windows protocol that authenticates through NEGOEX, including SMB or RDP by default, can expose unpatched hosts without credentials or user interaction.

CVSS severityUnavailable
Unscored
EPSS probability86.05%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Remote code execution in Windows NEGOEX allows remote attackers to run arbitrary code through pre-authentication negotiation messages. The flaw resides in SPNEGO's NEGOEX processing, but Microsoft and IBM have not disclosed the erroneous operation on message data. Any Windows protocol that authenticates through NEGOEX, including SMB or RDP by default, can expose unpatched hosts without credentials or user interaction.

The record

CVE
CVE-2022-37958
Published
Sep 13, 2022
Updated
Mar 11, 2025
Vendor
Microsoft
Product
Windows 10 Version 1507
Classifications
T1210
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 13, 2022CVE publishedPublication date reported by the CVE source.
  2. Mar 11, 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 <10.0.10240.19444

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Microsoft · Windows 10 Version 1507version=10.0.10240.0 <10.0.10240.19444
Microsoft · Windows Server 2019version=10.0.17763.0 <10.0.17763.3406
Microsoft · Windows 7version=6.1.0 <6.1.7601.26115
Microsoft · Windows 10 Version 21H1version=10.0.0 <10.0.19043.2006
Microsoft · Windows 8.1version=6.3.0 <6.3.9600.20571
Microsoft · Windows Server 2016 (Server Core installation)version=10.0.14393.0 <10.0.14393.5356
Microsoft · Windows 11 version 21H2version=10.0.0 <10.0.22000.978
Microsoft · Windows Server 2012 (Server Core installation)version=6.2.9200.0 <6.2.9200.23865
Microsoft · Windows Server 2012version=6.2.9200.0 <6.2.9200.23865
Microsoft · Windows 10 Version 21H2version=10.0.19043.0 <10.0.19044.2006
Microsoft · Windows Server 2016version=10.0.14393.0 <10.0.14393.5356
Microsoft · Windows Server 2008 R2 Service Pack 1version=6.1.7601.0 <6.1.7601.26115
Microsoft · Windows 10 Version 20H2version=10.0.0 <10.0.19042.2006
Microsoft · Windows Server 2008 R2 Service Pack 1 (Server Core installation)version=6.1.7601.0 <6.1.7601.26115
Microsoft · Windows Server 2012 R2 (Server Core installation)version=6.3.9600.0 <6.3.9600.20571
Microsoft · Windows Server 2019 (Server Core installation)version=10.0.17763.0 <10.0.17763.3406
Microsoft · Windows 7 Service Pack 1version=6.1.0 <6.1.7601.26115
Microsoft · Windows 10 Version 1607version=10.0.14393.0 <10.0.14393.5356
Microsoft · Windows Server 2022version=10.0.20348.0 <10.0.20348.1006
Microsoft · Windows 10 Version 1809version=10.0.0 <10.0.17763.3406; version=10.0.17763.0 <10.0.17763.3406
Microsoft · Windows Server 2012 R2version=6.3.9600.0 <6.3.9600.20571

Published CVSS scores

8.1Microsoft CorporationCVSS:3.1/AV:N/AC:H/PR:N/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 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

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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