CVE-2024-43550Network attack vector

Unauthenticated network identity spoofing

Published Oct 8, 2024 · Updated Aug 19, 2026

Improper certificate validation in Microsoft Windows Secure Channel allows remote attackers to spoof trusted network identities. Microsoft identifies Secure Channel and CWE-295 but has not published the certificate-validation path, malformed input, or incorrect acceptance operation. Exploitation requires network access and high-complexity conditions; success compromises data confidentiality and integrity without interrupting service.

CVSS severity7.4
High
EPSS probability1.09%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper certificate validation in Microsoft Windows Secure Channel allows remote attackers to spoof trusted network identities. Microsoft identifies Secure Channel and CWE-295 but has not published the certificate-validation path, malformed input, or incorrect acceptance operation. Exploitation requires network access and high-complexity conditions; success compromises data confidentiality and integrity without interrupting service.

The record

CVE
CVE-2024-43550
Published
Oct 8, 2024
Updated
Aug 19, 2026
Vendor
Microsoft
Product
Windows 10 Version 1507
Classifications
CWE-295, T1557
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 8, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 19, 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=10.0.10240.0 <10.0.10240.20796

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Microsoft · Windows 10 Version 1507version=10.0.10240.0 <10.0.10240.20796
Microsoft · Windows Server 2019version=10.0.17763.0 <10.0.17763.6414
Microsoft · Windows Server 2016 (Server Core installation)version=10.0.14393.0 <10.0.14393.7428
Microsoft · Windows 11, version 24H2version=10.0.26100.0 <10.0.26100.2033
Microsoft · Windows 11 version 21H2version=10.0.22000.0 <10.0.22000.3260
Microsoft · Windows Server 2012 (Server Core installation)version=6.2.9200.0 <6.2.9200.25118
Microsoft · Windows Server 2012version=6.2.9200.0 <6.2.9200.25118
Microsoft · Windows 10 Version 21H2version=10.0.19043.0 <10.0.19044.5011
Microsoft · Windows Server 2022, 23H2 Edition (Server Core installation)version=10.0.25398.0 <10.0.25398.1189
Microsoft · Windows Server 2016version=10.0.14393.0 <10.0.14393.7428
Microsoft · Windows 11 Version 22H3version=10.0.22631.0 <10.0.22631.4317
Microsoft · Windows 10 Version 22H2version=10.0.19045.0 <10.0.19045.5011
Microsoft · Windows Server 2012 R2 (Server Core installation)version=6.3.9600.0 <6.3.9600.22221
Microsoft · Windows Server 2019 (Server Core installation)version=10.0.17763.0 <10.0.17763.6414
Microsoft · Windows 11 Version 23H2version=10.0.22631.0 <10.0.22631.4317
Microsoft · Windows 11, version 22H2version=10.0.22621.0 <10.0.22621.4317
Microsoft · Windows 10 Version 1607version=10.0.14393.0 <10.0.14393.7428
Microsoft · Windows Server 2022version=10.0.20348.0 <10.0.20348.2762
Microsoft · Windows 10 Version 1809version=10.0.17763.0 <10.0.17763.6414
Microsoft · Windows Server 2012 R2version=6.3.9600.0 <6.3.9600.22221

Published CVSS scores

7.4Microsoft CorporationCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-295Improper Certificate Validation
T1557Adversary-in-the-Middle

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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