CVE-2026-50324
MediumCVSS 5.9Exploitation Probability (EPSS)
Elevated risk52th percentile - higher than 52% of all known CVEs
Summary
An infinite loop in Active Directory Federation Services (AD FS) allows an unauthorized attacker to cause a denial of service over the network.
Risk Assessment
The attack can block federation services, preventing login to applications relying on AD FS.
Recommendation
Apply the Microsoft security patch for AD FS.
Other vulnerabilities in Active Directory Federation Services
See all- CVE-2026-97788High
Observable discrepancy in Active Directory Federation Services (AD FS) allows an unauthorized attacker to disclose information over a network.
- CVE-2026-96222High
A vulnerability in Active Directory Federation Services (AD FS) related to improper certificate validation allows an unauthorized attacker to perform spoofing over a network.
- CVE-2026-56155HighActively exploited
Insufficient granularity of access control in Active Directory Federation Services (AD FS) allows an authorized attacker to elevate privileges locally.
- CVE-2026-72978Medium
Allocation of resources without limits or throttling in Active Directory Federation Services (AD FS) allows an unauthorized attacker to deny service over a network.
- CVE-2026-58529High
An out-of-bounds read vulnerability in Active Directory Federation Services (AD FS) allows an authorized attacker to disclose information over a network.
- CVE-2026-50647High
An infinite loop in Active Directory Federation Services (AD FS) allows an unauthorized attacker to remotely cause a denial of service (DoS).
- CVE-2026-50411High
A stack-based buffer overflow in Active Directory Federation Services (AD FS) allows an unauthorized attacker to deny service over a network.
- CVE-2026-50368High
A stack-based buffer overflow in Active Directory Federation Services allows an unauthorized attacker to deny service over a network.
- CVE-2026-50355High
A stack-based buffer overflow in Active Directory Federation Services allows an unauthorized attacker to remotely cause a denial of service (DoS).
- CVE-2026-50304High
Stack-based buffer overflow in Active Directory Federation Services (ADFS) allows an unauthorized attacker to perform a DoS attack over the network.
Original NVD description (English source)
Loop with unreachable exit condition ('infinite loop') in Active Directory Federation Services (AD FS) allows an unauthorized attacker to deny service over a network.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS