5.9Medium

CVE-2026-23656Windows App Installer Spoofing Vulnerability

Microsoft Windows App Client for Windows Desktop Published: 2026-03-10 20:05 (8 months ago)

Description

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

Weakness (CWE): CWE-345

Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.

Affected products and versions

Vendor	Product	Versions
microsoft	windows app	< 2.0.964.0
Microsoft	Windows App Client for Windows Desktop	1.00 – < 2.0.964

References and patches

Windows App Installer Spoofing Vulnerability vendor-advisorypatchVendor Advisory

CPE matches (NVD) (1)

cpe:2.3:a:microsoft:windows_app:*:*:*:*:*:windows:*:* < 2.0.964.0

CVSS score

5.9Medium

Source: microsoft · CVSS 3.1

Attack vector: Network
Attack complexity: High
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality: None
Integrity: High
Availability: None

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C

All scores (2)

cna	CVSS 3.1	5.9Medium
secure@microsoft.com	CVSS 3.1	5.9Medium

EPSS (chance of exploitation in 30 days)

0.35%

higher than 29% of all CVEs

CISA assessment (SSVC)

Exploitation: none
Automatable: no
Technical impact: partial

Timeline

ID reserved2026-01-14
Published2026-03-10 20:05
Reached IP-DB2026-10-24 23:40
Last updated2026-06-19 21:17

Assigned by (CNA): microsoft
NVD status: Analyzed

View at source: CVE.org · NVD

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