PatchSiren cyber security CVE debrief

CVE-2026-62879 Microsoft CVE debrief

A Windows SmartScreen tampering vulnerability allows an authorized local attacker to perform tampering. Multiple Windows versions are affected, including Windows 10, Windows 11, and Windows Server. Microsoft has released patches for this vulnerability. The vulnerability requires immediate attention from defenders responsible for Windows systems. Apply patches to prevent local tampering and potential elevation of privileges. The vulnerability affects multiple Windows versions, including Windows 10, Windows 11, and Windows Server.

Vendor: Microsoft
Product: Windows 10 Version 1809
CVSS: MEDIUM 5.5
CISA KEV: Not listed in stored evidence
Original CVE published: 2026-10-13
Original CVE updated: 2026-10-13
Advisory published: 2026-10-13
Advisory updated: 2026-10-13

Who should care

Defenders responsible for Windows systems, particularly those using Windows SmartScreen, should assess exposure and apply patches. This includes administrators, security teams, and IT personnel who manage Windows environments. They should review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance.

Why it matters

The Windows SmartScreen tampering vulnerability requires immediate attention from defenders responsible for Windows systems. Apply patches to prevent local tampering and potential elevation of privileges.

Local tampering with Windows SmartScreen
Potential elevation of privileges
Bypass of security features in Windows
Verification of patch application required

Technical summary

The Windows SmartScreen tampering vulnerability allows an authorized local attacker to perform tampering. The vulnerability affects multiple Windows versions, including Windows 10, Windows 11, and Windows Server. Microsoft has released patches for this issue.

Defensive priority

Apply patches immediately for Windows SmartScreen to prevent local tampering.

Recommended defensive actions

Apply patches for Windows SmartScreen
Verify Windows versions and apply patches as needed
Monitor Windows systems for updates

Evidence notes

The CVE record and NVD entry provide details on the vulnerability. Microsoft has released a patch for this issue. The vulnerability requires immediate attention from defenders responsible for Windows systems. Apply patches to prevent local tampering and potential elevation of privileges. The CVE record was published on 2026-10-13T19:00:38.941Z and has not been modified since then. The official CVE Program record and NVD entry provide source-provided CVE metadata and official NIST NVD

Sources and references

Verified primary and authoritative sources

CVE-2026-62879 CVE Program record
Publisher, destination, and source semantics verified

URL: https://www.cve.org/CVERecord?id=CVE-2026-62879

CVE Program - Official CVE Program record with source-provided CVE metadata.
CVE-2026-62879 NVD vulnerability detail
Publisher, destination, and source semantics verified

URL: https://nvd.nist.gov/vuln/detail/CVE-2026-62879

NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Windows SmartScreen Tampering Vulnerability
Unverified legacy reference

URL: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/62xxx/CVE-2026-62879.json

cve_program_cvelist_v5
Source reference
Unverified legacy reference

URL: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62879

Supplemental source - vendor-advisory, patch

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.