CVE-2026-58529 Windows Active Directory Federation Services (ADFS) Information Disclosure Vulnerability
An authorized attacker can disclose sensitive information via an out-of-bounds read in Windows Active Directory Federation Services.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-58529?
CVE-2026-58529 is a high-severity vulnerability in Microsoft Windows 11 26h1, published on 14 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Out-of-bounds read in Active Directory Federation Services (AD FS) allows an authorized attacker to disclose information over a network.
Weakness: CWE-125
Which versions are affected by CVE-2026-58529?
It affects 1 product.
Products include Microsoft Windows 11 26h1.
How do I fix CVE-2026-58529?
No fix has been published for CVE-2026-58529 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-58529 being exploited?
There is no known exploitation of CVE-2026-58529 in the wild and no public exploit code.
Other vulnerabilities in Microsoft Windows 11 26h1
- CVE-2026-85921 Windows Secure Kernel Mode Elevation of Privilege Vulnerability
- CVE-2026-83939 Windows Secure Kernel Mode Elevation of Privilege Vulnerability
- CVE-2026-105005 Windows Schannel Remote Code Execution Vulnerability
- CVE-2026-85850 Windows Kernel Elevation of Privilege Vulnerability
- CVE-2026-97803 Windows Kernel Elevation of Privilege Vulnerability
Sources
Also known as GHSA-rwpj-48r2-w395.