Auth bypass in Intel Tdx Module
CVE-2026-20885
Improper authentication in the Intel(R) TDX module for some Intel(R) platforms within Ring 0: Trust Domain may allow an information disclosure and escalation of privilege. System software 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 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 (low), integrity (low) and availability (none) impacts.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.001 (3.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 3rd percentile — 3.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: -0.000
Affected products
- Intel Tdx Module
- Intel(r) Platforms — versions See references
Weakness classification (CWE)
References
- intel.com/content/www/us/en/security-center/advisory/intel-sa-01436.html (Vendor Advisory)
Frequently asked questions
- What is CVE-2026-20885?
- CVE-2026-20885 is a high-severity vulnerability in Intel Tdx Module, classified under Improper Authentication. CVSS score: 7.2/10. Published 2026-08-11.
- How severe is CVE-2026-20885?
- High severity. CVSS v3 base score is 7.2 out of 10.