CVE-2021-42291
HighCVSS 7.5Exploitation Probability (EPSS)
High risk88th percentile - higher than 88% of all known CVEs
Summary
Elevation of privilege vulnerability in Active Directory Domain Services. Allows an attacker to gain elevated privileges in the domain.
Risk Assessment
An attacker could gain domain administrator privileges, leading to full compromise of the Active Directory infrastructure.
Recommendation
Install the latest security updates for Active Directory Domain Services.
Other vulnerabilities in Active Directory Domain Services
See all- CVE-2026-88165High
Out-of-bounds write in Active Directory Domain Services allows an authorized attacker to execute code over a network.
- CVE-2026-83647High
Out-of-bounds read in Active Directory Domain Services allows an unauthorized attacker to deny service over a network.
- CVE-2026-70229High
Incorrect authorization in Active Directory Domain Services. An unauthorized attacker can execute code over a network.
- CVE-2022-26923HighActively exploited
A privilege elevation vulnerability in Active Directory Domain Services (AD DS). An attacker can gain domain administrator privileges.
- CVE-2021-42287HighActively exploited
Active Directory Domain Services Elevation of Privilege Vulnerability. Technical details are not provided in the description.
- CVE-2021-42278HighActively exploited
Active Directory Domain Services Elevation of Privilege Vulnerability. Technical details are not provided in the description.
- CVE-2026-69809High
Missing release of memory after effective lifetime in Active Directory Domain Services allows an unauthorized attacker to deny service over a network.
- CVE-2026-69546High
Use after free in Active Directory Domain Services allows an unauthorized attacker to execute code over a network.
- CVE-2026-69524High
Use-after-free vulnerability in Active Directory Domain Services allows an unauthorized attacker to execute code over a network.
- CVE-2026-69359High
Heap-based buffer overflow in Active Directory Domain Services allows an authorized attacker to elevate privileges locally.
Original NVD description (English source)
Active Directory Domain Services Elevation of Privilege Vulnerability
Vulnerability data from NVD (NIST) · CISA KEV · EPSS