CVE-2024-43491

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2024-09-10. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 12%CVSS: 9.8Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Microsoft is aware of a vulnerability in Servicing Stack that has rolled back the fixes for some vulnerabilities affecting Optional Components on Windows 10, version 1507 (initial version released July 2015). This means that an attacker could exploit these previously mitigated vulnerabilities on Windows 10, version 1507 (Windows 10 Enterprise 2015 LTSB and Windows 10 IoT Enterprise 2015 LTSB) systems that have installed the Windows security update released on March 12, 2024—KB5035858 (OS Build 10240.20526) or other updates released until August 2024. All later versions of Windows 10 are not impacted by this vulnerability. This servicing stack vulnerability is addressed by installing the September 2024 Servicing stack update (SSU KB5043936) AND the September 2024 Windows security update (KB5043083), in that order. Note: Windows 10, version 1507 reached the end of support (EOS) on May 9, 2017 for devices running the Pro, Home, Enterprise, Education, and Enterprise IoT editions. Only Windows 10 Enterprise 2015 LTSB and Windows 10 IoT Enterprise 2015 LTSB editions are still under support.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
60(Track)
EG Risk 60/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
12%
EPSS %ILE
96%
KEV
Not listed

Published

September 10, 2024

Last Modified

September 26, 2024

Advisory Details (1)

Auto-updated Jul 31, 2026
Patch available. Sources: microsoft.
microsoft Patch Available

Security Update Guide - Microsoft Security Response Center

Security Update Guide - Microsoft Security Response Center. Patch available via Microsoft Security Update

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-43491

Vendor Advisories for CVE-2024-43491(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 6× in last 7d / 38× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 104 total refreshes for this CVE.

  1. 2026-08-07 16:25 UTCEPSS rescore
  2. 2026-08-06 13:45 UTCEPSS rescore
  3. 2026-08-05 19:16 UTCEPSS rescore
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  16. 2026-07-23 02:40 UTCEG score recompute
  17. 2026-07-22 14:07 UTCEPSS rescore
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  1. 2026-07-18 10:03 UTCEPSS rescore
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  7. 2026-07-13 22:29 UTCEPSS rescore
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  11. 2026-07-11 08:26 UTCEPSS rescore
  12. 2026-07-09 19:09 UTCEPSS rescore
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  18. 2026-06-30 23:21 UTCEPSS rescore
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  20. 2026-06-28 14:07 UTCEPSS rescore
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  22. 2026-06-28 04:55 UTCEPSS rescore
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  24. 2026-06-27 03:07 UTCEPSS rescore
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  26. 2026-06-25 13:49 UTCEPSS rescore
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  41. 2026-06-15 17:47 UTCEPSS rescore
  42. 2026-06-14 23:17 UTCEPSS rescore
  43. 2026-06-13 22:59 UTCEPSS rescore
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  45. 2026-06-13 22:59 UTCEPSS rescore
  46. 2026-06-12 23:11 UTCEPSS rescore
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  48. 2026-06-11 13:59 UTCEPSS rescore
  49. 2026-06-10 22:18 UTCEPSS rescore
  50. 2026-06-10 13:21 UTCEPSS rescore
  51. 2026-06-08 14:16 UTCEPSS rescore
  52. 2026-06-08 14:16 UTCEPSS rescore
  53. 2026-06-07 15:24 UTCEPSS rescore
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  55. 2026-06-06 13:46 UTCEPSS rescore
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  63. 2026-06-01 13:51 UTCEPSS rescore
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  65. 2026-05-31 00:16 UTCEPSS rescore
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  67. 2026-05-29 13:43 UTCEPSS rescore
  68. 2026-05-28 13:44 UTCEPSS rescore
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  74. 2026-05-26 07:18 UTCEPSS rescore
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Frequently asked(5)

What is CVE-2024-43491?
CVE-2024-43491 is a critical vulnerability published on September 10, 2024. Microsoft is aware of a vulnerability in Servicing Stack that has rolled back the fixes for some vulnerabilities affecting Optional Components on Windows 10, version 1507 (initial version released July 2015). This means that an attacker could exploit these previously mitigated vulnerabilities on…
When was CVE-2024-43491 disclosed?
CVE-2024-43491 was first published in the National Vulnerability Database on September 10, 2024, with the most recent update on September 26, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2024-43491 actively exploited?
CVE-2024-43491 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 12% probability of exploitation in the next 30 days, which ranks it in the top 4.2% of all scored CVEs.
What is the CVSS score of CVE-2024-43491?
CVE-2024-43491 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2024-43491?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2024-43491, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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