CVE-2015-1638 Security feature bypass in n/a
Remote attackers can bypass access restrictions and disclose information by leveraging an unattended workstation due to improper logoff handling in AD FS.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2015-1638?
CVE-2015-1638 is a medium-severity vulnerability in Microsoft Windows Server 2012, published on 14 Apr 2015. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
Microsoft Active Directory Federation Services (AD FS) 3.0 on Windows Server 2012 R2 does not properly handle logoff actions, which allows remote attackers to bypass intended access restrictions by leveraging an unattended workstation, aka "Active Directory Federation Services Information Disclosure Vulnerability."
Weakness: CWE-264
Which versions are affected by CVE-2015-1638?
It affects 1 product.
Products include Microsoft Windows Server 2012.
How do I fix CVE-2015-1638?
No fix has been published for CVE-2015-1638 yet. Limit exposure of the affected software until one is available.
Is CVE-2015-1638 being exploited?
There is no known exploitation of CVE-2015-1638 in the wild and no public exploit code.
Other vulnerabilities in Microsoft Windows Server 2012
- CVE-2025-59287 Microsoft Windows Server Update Service (WSUS) Deserialization of Untrusted Data
- CVE-2026-69595 Windows Services for NFS ONCRPC XDR Driver Remote Code Execution Vulnerability
- CVE-2026-78445 Windows Services for NFS ONCRPC XDR Driver Remote Code Execution Vulnerability
- CVE-2026-41089 Windows Netlogon Remote Code Execution Vulnerability
- CVE-2024-43639 Windows KDC Proxy Remote Code Execution Vulnerability
Sources
Also known as GHSA-r4hh-qx8q-mghc.