CVE-2024-43491Known exploitationNetwork attack vector

Remote code execution via security-fix rollback

Published Sep 10, 2024 · Updated Aug 10, 2026

Remote code execution in the Servicing Stack for Windows 10 version 1507 allows remote attackers to execute code through restored flaws. The servicing stack rolls back previously installed security fixes for Optional Components, restoring vulnerable component code; Microsoft has not disclosed the affected routines. Exposure requires Enterprise 2015 LTSB or IoT Enterprise 2015 LTSB with KB5035858 or another update through August 2024 installed.

CVSS severity9.8
Critical
EPSS probability12.38%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Remote code execution in the Servicing Stack for Windows 10 version 1507 allows remote attackers to execute code through restored flaws. The servicing stack rolls back previously installed security fixes for Optional Components, restoring vulnerable component code; Microsoft has not disclosed the affected routines. Exposure requires Enterprise 2015 LTSB or IoT Enterprise 2015 LTSB with KB5035858 or another update through August 2024 installed.

The record

CVE
CVE-2024-43491
Published
Sep 10, 2024
Updated
Aug 10, 2026
Vendor
Microsoft
Product
Windows 10 Version 1507
Classifications
CWE-416
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 10, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 10, 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=10.0.10240.0 <10.0.10240.20766

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Microsoft · Windows 10 Version 1507version=10.0.10240.0 <10.0.10240.20766

Published CVSS scores

9.8MicrosoftCVSS:3.1/AV:N/AC:L/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationReported
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free

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.

Reported exploitation

Technologies

Your stack

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Your stack

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