Patch tracker / CVE reference / CVE-2024-49039

CVE-2024-49039

Critical severity Microsoft vulnerability, CVSS 9.8. Fixed by 10 Microsoft security updates.

CriticalCISA KEVRansomware

Risk summary

CVSS base
9.8
EPSS exploit probability
82%
Severity
Critical

Exploitation and severity

Listed in the CISA Known Exploited Vulnerabilities catalog, confirmed exploited in the wild. EPSS exploit probability 82%. CVSS 9.8 (Critical). Linked to ransomware activity.

This CVE is among the top 10% of tracked Microsoft CVEs by EPSS exploit probability, and one of 2 actively-exploited CVEs in November 2024.

What to do

Treat as urgent: it is being exploited in the wild (CISA KEV), so patch ahead of items that are not. In Intune or Defender, confirm whether the fixing updates KB5046612, KB5046613, KB5046615, KB5046616, KB5046617, KB5046618, KB5046633, KB5046665, KB5046696, KB5046698 are installed across the affected products. Senserva does this automatically across your tenant and flags every missing patch.

Official patch for CVE-2024-49039

Apply the Microsoft security updates below to fix CVE-2024-49039. Each KB page links to the Microsoft Update Catalog download for every affected product.

KB5046612KB5046613KB5046615KB5046616KB5046617KB5046618KB5046633KB5046665KB5046696KB5046698

Affected products

  • Windows 10 Version 1809 for 32-bit Systems
  • Windows 10 Version 1809 for x64-based Systems
  • Windows 10 Version 21H2 for 32-bit Systems
  • Windows Server 2019
  • Windows Server 2022
  • Windows Server 2022 (Server Core installation)

Authoritative references

NVD detailMicrosoft MSRCCISA KEV catalogFIRST.org EPSS

Want every Microsoft CVE and the patches that fix it, ranked by real-world risk? See the Microsoft Patch Tracker.

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Lexicon: the terms on this page
CVE
Common Vulnerabilities and Exposures. A unique ID for one publicly known vulnerability, such as CVE-2025-1234.
KB
Microsoft Knowledge Base article. The identifier for a specific Microsoft update.
KEV
CISA Known Exploited Vulnerabilities. CVEs confirmed exploited in the wild. Fix these first.
CVSS
Common Vulnerability Scoring System. A standardized Severity score from 0 to 10.
EPSS
Exploit Prediction Scoring System. The probability a CVE will be exploited in the next 30 days.
MSRC
Microsoft Security Response Center. Microsoft's Patch Tuesday advisories and KB-to-CVE mapping.
NVD
National Vulnerability Database (NIST). Authoritative CVE metadata and CVSS scores.
Ransomware
The vulnerability is linked to known ransomware activity.