CVE-2026-55001
HighCVSS 7.8Exploitation Probability (EPSS)
Low risk12th percentile - higher than 12% of all known CVEs
Summary
Improper certificate validation in Windows Active Directory allows an authorized attacker to elevate privileges locally.
Risk Assessment
An authorized attacker can escalate privileges within the domain, threatening the entire Active Directory infrastructure.
Recommendation
Install the latest security updates from Microsoft.
Other vulnerabilities in Windows Active Directory
See all- CVE-2026-65777Medium
Inadequate encryption strength in Windows Active Directory allows an authorized attacker to bypass a security feature over a network.
- CVE-2026-49179High
Improper neutralization of special elements used in a command (command injection) in Windows Active Directory allows an unauthorized attacker to execute code over a network.
- CVE-2026-54115High
Integer overflow or wraparound in Windows Active Directory allows an authorized attacker to elevate privileges locally.
- CVE-2026-50682High
An out-of-bounds read vulnerability in Windows Active Directory. It allows an authorized attacker to deny service over a network.
- CVE-2026-54119High
Infinite loop vulnerability in Windows Active Directory. An unauthorized attacker can remotely cause a denial of service.
- CVE-2026-33826High
Improper input validation in Windows Active Directory allows an authorized attacker to execute code over an adjacent network.
Original NVD description (English source)
Improper certificate validation in Windows Active Directory allows an authorized attacker to elevate privileges locally.