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TI-2026-73380 Aliases CVE-2026-105726GHSA-v277-2c6x-cp2w

Out-of-bounds read in Microsoft Defender discloses information

Priority LOW 25CWE-125Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from Microsoft.

Summary

Microsoft Defender for Endpoint for Windows from 1.0.0.0 before 4.18.26060.3008 contains an out-of-bounds read (CWE-125) that lets the code read memory past the end of a buffer. An authorized local attacker can use this to disclose information. Microsoft rates exploitation as less likely, and the flaw is not listed in CISA KEV.

Written with Claude Haiku 5.5 from the sources below · 2026-11-03

Description from the CNA

Out-of-bounds read in Microsoft Defender allows an authorized attacker to disclose information locally.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00433 37th percentileScored 2026-11-07
Fix Fixed Microsoft Defender for Endpoint for Windows (Microsoft): 4.18.26060.3008

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
MicrosoftMicrosoft Defender for Endpoint for Windows1.0.0.0 to before 4.18.26060.30084.18.26060.3008Patch availableCNA
  • Microsoft Defender for Endpoint for Windows VendorMicrosoft Affected 1.0.0.0 to before 4.18.26060.3008 Fixed in 4.18.26060.3008 Patch available CNA

Remediation

Update Microsoft Defender for Endpoint for Windows to 4.18.26060.3008 or later, which is the Security Update build that fixes this flaw.

Written with Claude Haiku 5.5 from the sources below · 2026-11-03

  • Fix · CNA Microsoft Defender for Endpoint for Windows (Microsoft) Fixed in 4.18.26060.3008

Vendor assessments

Microsoft

Microsoft's page for this CVE →

Impact
Information Disclosure
Exploited
No
Publicly disclosed
No
Exploitability
Exploitation Less Likely
ProductStatusPlan or fix
Microsoft Defender for Endpoint for WindowsFixed 4.18.26060.3008 · Security Update

Timeline

  1. 2026-10-13 Threatist record created from CVE-2026-105726
  2. 2026-10-13 CISA SSVC decision points changed
  3. 2026-10-13 Priority changed: MEDIUM → LOW
  4. 2026-10-13 Alias added: GHSA-v277-2c6x-cp2w

References

Patch 1

  • TI-2026-42212 Microsoft SharePoint Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-37256 Microsoft SharePoint Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-26194 Windows Internet Key Exchange (IKE) Service Extensions Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-16982 Microsoft SharePoint Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-36863 Windows Server Update Service (WSUS) Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-33671 Microsoft SharePoint Server Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
See all 18045 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences