PT-2026-24265 · Microsoft · Windows App Client+2

Zoltan Harmath · Published 2026-03-10 · Updated 2026-03-16 · CVE-2026-23656

Positive Technologies (AI Summary)

CVSS v3.1

5.9

Medium

Base vector

AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Name of the Vulnerable Software and Affected Versions Windows App Installer (affected versions not specified)

Description Insufficient verification of data authenticity in the Windows App Installer allows an unauthorized attacker to perform spoofing over a network. Exploitation of this issue may allow a remote attacker to conduct spoofing attacks.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Insufficient Verification of Data Authenticity

Weakness Enumeration

CWE-345

Related Identifiers

BDU:2026-03044

CVE-2026-23656

Affected Products

Windows App Client

Windows App Client For Windows Desktop

Windows App

References · 5

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-23656 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-23656 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-23656 · Security Note
• https://bdu.fstec.ru/vul/2026-03044 · Security Note
• https://twitter.com/CVEnew/status/2033361135429173438 · Twitter Post