CVE-2026-20898
HighCVSS 7.2Exploitation 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.
Other vulnerabilities in Intel Xeon processors
See all- CVE-2026-20901Medium
Some Intel(R) Xeon(R) processors contain an improper input validation vulnerability in firmware that may allow an escalation of privilege. A startup code and SMM adversary with a privileged user and a high complexity attack may enable data alteration. This requires local access but no user interaction. The vulnerability may impact system integrity (high), but not confidentiality or availability.
- CVE-2026-20713Medium
Always-incorrect control flow implementation in Intel Xeon processor firmware may allow privilege escalation. A privileged attacker with a high complexity attack can escalate privileges via local access, without user interaction.
- CVE-2019-11137High
Insufficient input validation in system firmware for Intel(R) Xeon(R) Scalable Processors, Intel(R) Xeon(R) Processors D Family, Intel(R) Xeon(R) Processors E5 v4 Family, Intel(R) Xeon(R) Processors E7 v4 Family and Intel(R) Atom(R) processor C Series may allow a privileged user to potentially enable escalation of privilege, denial of service and/or information disclosure via local access.
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS