CVE-2026-20898
HighCVSS 8.5Exploitation Probability (EPSS)
Low risk2th percentile - higher than 2% of all known CVEs
Summary
Improper access control in the firmware for Alias Checking Trusted Module for some Intel(R) Xeon(R) processors may allow privilege escalation. A privileged user with a high complexity attack may enable escalation. This may occur via local access without user interaction. Confidentiality and integrity impact are high.
Risk Assessment
Privilege escalation could lead to full compromise of system confidentiality and integrity.
Recommendation
Update Intel Xeon processor firmware to the latest version and restrict physical access to servers.
Original NVD description (English source)
Improper access control in the firmware for some in Alias Checking Trusted Module for some Intel(R) Xeon(R) processors may allow an escalation of privilege. Startup code and SMM adversary with a privileged user combined with a high complexity attack may enable escalation of privilege. This result may potentially occur via local access when attack requirements are not present without special internal knowledge and requires no user interaction. The potential vulnerability may impact the confidentiality (high), integrity (high) and availability (none) of the vulnerable system, resulting in subsequent system confidentiality (high), integrity (high) and availability (none) impacts.