Vulnerability · Published Mar 10, 2026 · Assigned by microsoft
CVE-2026-23656Windows App Installer Spoofing Vulnerability
Medium 5.9
In plain English
A medium-severity insufficient verification of data authenticity in Windows App Client for Windows Desktop from Microsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 28% of all known vulnerabilities).
Severity (CVSS 3.1)5.9Medium
Exploit odds (30 days)0.3%top 71.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Insufficient verification of data authenticity in Windows App Installer allows an unauthorized attacker to perform spoofing over a network.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Windows App Client for Windows Desktop | 1.00 – before 2.0.964 |
Weakness: CWE-345 · Vector: 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
References
- Windows App Installer Spoofing Vulnerability vendor-advisory, patch