CVE-2026-23656 Windows App Installer Spoofing Vulnerability
An attacker can spoof data authenticity in Windows App Installer over a network, bypassing security verification mechanisms.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-23656?
CVE-2026-23656 is a medium-severity vulnerability in Microsoft Windows App Client for Windows Desktop, published on 10 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Insufficient verification of data authenticity in Windows App Installer allows an unauthorized attacker to perform spoofing over a network.
Weakness: CWE-345
Which versions are affected by CVE-2026-23656?
It affects 1 product.
Products include Microsoft Windows App.
How do I fix CVE-2026-23656?
No fix has been published for CVE-2026-23656 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-23656 being exploited?
There is no known exploitation of CVE-2026-23656 in the wild and no public exploit code.
Other vulnerabilities in Microsoft Windows App Client for Windows Desktop
- CVE-2026-59124 Microsoft High Performance Computing (HPC) Pack Remote Code Execution Vulnerability
- CVE-2026-59133 Microsoft High Performance Computing (HPC) Pack Elevation of Privilege Vulnerability
- CVE-2020-0919 Privilege escalation in Microsoft Remote Desktop for Mac
- CVE-2026-69550 Windows App for Mac Information Disclosure Vulnerability
- CVE-2026-21517 Windows App for Mac Installer Elevation of Privilege Vulnerability
Sources
Also known as GHSA-53j2-qxv2-hfqj.