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TI-2026-19048 Aliases CVE-2026-23656GHSA-53j2-qxv2-hfqj

Windows App Installer Spoofing Vulnerability

Priority LOW 26CWE-345Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
Spoofing
Confidentiality · integrity · availability
None · High · None
Fix status
Fixed

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

Summary

Insufficient verification of data authenticity in Windows App Installer allows an unauthorized attacker to perform spoofing over a network.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00346 28th percentileScored 2026-11-07
Fix Fixed Windows App Client for Windows Desktop (Microsoft): 2.0.964

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
MicrosoftWindows App Client for Windows Desktop1.00 to before 2.0.9642.0.964Patch availableCNA
  • Windows App Client for Windows Desktop VendorMicrosoft Affected 1.00 to before 2.0.964 Fixed in 2.0.964 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:microsoft:windows_app:*:*:*:*:*:windows:*:*before 2.0.964.0VulnerableMicrosoft
  • cpe:2.3:a:microsoft:windows_app:*:*:*:*:*:windows:*:* Versions before 2.0.964.0 Vulnerable ·Microsoft

Remediation

  • Fix · CNA Windows App Client for Windows Desktop (Microsoft) Fixed in 2.0.964

Vendor assessments

Microsoft

Microsoft's page for this CVE →

Impact
Spoofing
Exploited
No
Publicly disclosed
No
Exploitability
Exploitation Unlikely
ProductStatusPlan or fix
Windows App Client for Windows DesktopFixed2.0.964 Security Update

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-23656
  2. 2026-10-03 Alias added: GHSA-53j2-qxv2-hfqj

References

Patch 1

  • TI-2026-42292 Microsoft High Performance Computing (HPC) Pack Remote Code Execution Vulnerability CVSS 3.1CRITICAL 9.8
  • TI-2025-19580 Remote Desktop Client Remote Code Execution Vulnerability CVSS 3.1HIGH 8.8
  • TI-2026-31167 Remote Desktop Client Remote Code Execution Vulnerability CVSS 3.1HIGH 8.8
  • TI-2025-21342 Remote Desktop Client Remote Code Execution Vulnerability CVSS 3.1HIGH 8.8
  • TI-2026-42300 Microsoft High Performance Computing (HPC) Pack Elevation of Privilege Vulnerability CVSS 3.1HIGH 8.8
  • TI-2026-34866 Remote Desktop Client Remote Code Execution Vulnerability CVSS 3.1HIGH 8.8
See all 20 →

Sources

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