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Vulnerabilities

Vulnerability · CVE-2026-108463

Windows SmartScreen Security Feature Bypass Vulnerability

Published Oct 13, 2026 · catalog updated Oct 16, 2026 · Microsoft Windows

Check if you run it

No confirmed exploitation is on record for CVE-2026-108463. EPSS is 0.88%. Act only if a listed version of Microsoft Windows is installed.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High8.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.88%
Remediation
Advisory link
Affected products
microsoft Windows 11 Version 24H2 for ARM64-based Systems · microsoft Windows 11 Version 24H2 for x64-based Systems · microsoft Windows 11 Version 25H2 for ARM64-based Systems · microsoft Windows 11 Version 25H2 for x64-based Systems · microsoft Windows 11 Version 26H1 for ARM64-based Systems · microsoft Windows 11 Version 26H2 for ARM64-based Systems

Affected Microsoft products: Windows 11 Version 24H2 for ARM64-based Systems, Windows 11 Version 24H2 for x64-based Systems, Windows 11 Version 26H1 for ARM64-based Systems, Windows 11 version 26H1 for x64-based Systems, Windows 11 Version 26H2 for x64-based Systems, Windows 11 Version 26H2 for ARM64-based Systems, Windows 11 Version 25H2 for x64-based Systems, Windows 11 Version 25H2 for ARM64-based Systems.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • microsoft Windows 11 Version 24H2 for ARM64-based Systemsversion unspecified
  • microsoft Windows 11 Version 24H2 for x64-based Systemsversion unspecified
  • microsoft Windows 11 Version 25H2 for ARM64-based Systemsversion unspecified
  • microsoft Windows 11 Version 25H2 for x64-based Systemsversion unspecified
  • microsoft Windows 11 Version 26H1 for ARM64-based Systemsversion unspecified
  • microsoft Windows 11 Version 26H2 for ARM64-based Systemsversion unspecified
  • microsoft Windows 11 Version 26H2 for x64-based Systemsversion unspecified
  • microsoft Windows 11 version 26H1 for x64-based Systemsversion unspecified
  • vendor Microsoft Windows 11 Version 24H2version unspecified
  • vendor Microsoft Windows 11 Version 25H2version unspecified
  • vendor Microsoft Windows 11 Version 26H2version unspecified
  • vendor Microsoft Windows 11 version 26H1version unspecified

How to fix CVE-2026-108463

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-108463. EPSS is 0.88%. Act only if a listed version of Microsoft Windows is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-41. EPSS 0.88%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Windows security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 13, 2026 · CIRCL Vulnerability Lookup

    Detected

    Improper resolution of path equivalence in Windows SmartScreen allows an unauthorized attacker to bypass a security feature over a network.

  2. Oct 14, 2026 · CIRCL Vulnerability Lookup

    Updated

    Improper resolution of path equivalence in Windows SmartScreen allows an unauthorized attacker to bypass a security feature over a network.

  3. Oct 16, 2026 · NIST NVD

    Updated

    Improper resolution of path equivalence in Windows SmartScreen allows an unauthorized attacker to bypass a security feature over a network.

Sources

  • CIRCL Vulnerability LookupVulnerability recordCVE-2026-108463

    Improper resolution of path equivalence in Windows SmartScreen allows an unauthorized attacker to bypass a security feature over a network.

    vulnerability.circl.lu
  • CVE.orgVulnerability recordCVE-2026-108463

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-108463

    30-day exploitation probability 0.9%

    first.org
  • Microsoft Security Update GuideVendor advisoryCVE-2026-108463

    Windows 11 Version 24H2 for ARM64-based Systems, Windows 11 Version 24H2 for x64-based Systems, Windows 11 Version 26H1 for ARM64-based Systems, Windows 11 version 26H1 for x64-based Systems

    msrc.microsoft.com
  • NIST NVDVulnerability recordCVE-2026-108463

    Improper resolution of path equivalence in Windows SmartScreen allows an unauthorized attacker to bypass a security feature over a network.

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.