7.2
HIGH
CVSS 3.1
CVE-2026-20885
Intel TDX Module Improper Authentication Vulnerability
Overview
Description
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.
Details
INFO
Published Date :
Aug. 11, 2026, 5:17 p.m.
Last Modified :
Aug. 31, 2026, 2:33 p.m.
Remotely Exploit :
No
Source :
[email protected]
Impact
Affected Products
The following products are affected by CVE-2026-20885
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
Scoring
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework
for assessing the severity of vulnerabilities in software and systems.
We collect and displays CVSS scores from various sources for each CVE.
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 4.0 | HIGH | 6dda929c-bb53-4a77-a76d-48e79601a1ce | ||||
| CVSS 4.0 | HIGH | [email protected] |
Solution
Update Intel TDX module to address authentication issues and prevent privilege escalation and information disclosure.
- Apply Intel TDX module updates.
- Consult Intel security advisories for affected platforms.
- Restrict privileged user access.
- Monitor systems for suspicious activity.
References
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-20885.
| URL | Resource |
|---|---|
| https://intel.com/content/www/us/en/security-center/advisory/intel-sa-01436.html | Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-20885 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-20885
weaknesses.
CAPEC-22: Exploiting Trust in Client Exploiting Trust in Client
CAPEC-57: Utilizing REST's Trust in the System Resource to Obtain Sensitive Data Utilizing REST's Trust in the System Resource to Obtain Sensitive Data
CAPEC-94: Adversary in the Middle (AiTM) Adversary in the Middle (AiTM)
CAPEC-114: Authentication Abuse Authentication Abuse
CAPEC-115: Authentication Bypass Authentication Bypass
CAPEC-151: Identity Spoofing Identity Spoofing
CAPEC-194: Fake the Source of Data Fake the Source of Data
CAPEC-593: Session Hijacking Session Hijacking
CAPEC-633: Token Impersonation Token Impersonation
CAPEC-650: Upload a Web Shell to a Web Server Upload a Web Shell to a Web Server
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-20885 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-20885 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Aug. 31, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:N Added CPE Configuration AND OR *cpe:2.3:o:intel:tdx_module:*:*:*:*:*:*:*:* versions up to (including) 1.5.28 OR cpe:2.3:h:intel:xeon_platinum_8461v:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_platinum_8468:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_platinum_8468h:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_platinum_8468v:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_platinum_8470:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_platinum_8470n:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_platinum_8470q:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_platinum_8471n:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_gold_5411n:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_gold_5412u:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_gold_5416s:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_gold_5418n:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_gold_5418y:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_gold_6414u:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_gold_6416h:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_platinum_8444h:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_platinum_8450h:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_platinum_8452y:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_platinum_8454h:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_platinum_8458p:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_gold_6418h:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_gold_6421n:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_gold_6426y:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_gold_6428n:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_gold_6430:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_gold_6434:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_silver_4410y:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_bronze_3408u:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_platinum_8460h:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_gold_6434h:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_gold_6438m:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_gold_6438n:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_gold_6442y:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_gold_6444y:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_gold_6448h:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_gold_6448y:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_gold_6454s:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_gold_6458q:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_gold_5415:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_gold_5420:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_gold_6438y:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_platinum_8460y:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_platinum_8462y:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_platinum_8480:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_silver_4416:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_silver_4410tm:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:intel:tdx_module:*:*:*:*:*:*:*:* versions up to (including) 1.5.28 OR cpe:2.3:h:intel:xeon_bronze_3508u:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_gold_5512u:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_gold_5515+:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_gold_5520+:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_gold_6526y:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_gold_6530:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_gold_6534:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_gold_6538n:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_gold_6538y+:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_gold_6542y:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_gold_6544y:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_gold_6548n:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_gold_6548y+:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_gold_6554s:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_gold_6558q:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_platinum_8558:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_platinum_8558p:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_platinum_8558u:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_platinum_8562y+:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_platinum_8568y+:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_platinum_8570:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_platinum_8571n:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_platinum_8580:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_platinum_8581v:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_platinum_8592+:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_platinum_8592v:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_platinum_8593q:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_silver_4509y:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_silver_4510:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_silver_4510t:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_silver_4514y:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_silver_4516y+:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:intel:tdx_module:*:*:*:*:*:*:*:* versions up to (including) 2.0.16 OR cpe:2.3:h:intel:xeon_4108:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6315p:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6325p:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6333p:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6337p:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6349p:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6353p:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6357p:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6369p:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6377p:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6503p:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6503p-b:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6505p:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6507p:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6511p:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6513p-b:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6515p:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6516p-b:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6517p:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6518p-b:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6520p:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6521p:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6523p-b:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6527p:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6530p:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6532p-b:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6533p-b:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6543p-b:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6544p-b:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6546p-b:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6548p-b:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6553p-b:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6556p-b:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6563p-b:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6706p-b:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6714p:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6716p-b:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6718p-b:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6724p:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6725p:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6726p-b:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6728p:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6730p:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6731p:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6732p:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6736p:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6737p:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6738p:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6740p:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6741p:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6745p:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6747p:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6748p:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6756p-b:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6760p:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6761p:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6766p-b:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6767p:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6768p:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6768p-b:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6774p:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6776p:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6776p-b:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6781p:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6787p:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6788p:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6944p:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6952p:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6960p:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6962p:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6972p:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6978p:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6979p:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6980p:-:*:*:*:*:*:*:* Added CPE Configuration AND OR *cpe:2.3:o:intel:tdx_module:*:*:*:*:*:*:*:* versions up to (including) 2.0.16 OR cpe:2.3:h:intel:xeon_6503p-b:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6513p-b:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6516p-b:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6518p-b:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6523p-b:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6532p-b:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6533p-b:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6543p-b:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6544p-b:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6546p-b:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6548p-b:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6553p-b:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6556p-b:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6563p-b:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6706p-b:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6716p-b:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6718p-b:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6726p-b:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6756p-b:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6766p-b:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6768p-b:-:*:*:*:*:*:*:* cpe:2.3:h:intel:xeon_6776p-b:-:*:*:*:*:*:*:* Added Reference Type Intel Corporation: https://intel.com/content/www/us/en/security-center/advisory/intel-sa-01436.html Types: Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Aug. 12, 2026
Action Type Old Value New Value Added CWE CWE-287 Added SSVC {'id': 'CVE-2026-20885', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-08-12T15:53:59.018189Z'} -
New CVE Received by [email protected]
Aug. 11, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'n/a', 'product': 'Intel(R) platforms', 'versions': [{'status': 'affected', 'version': 'See references'}], 'defaultStatus': 'unaffected'}] Added Description 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. Added CVSS V4.0 AV:L/AC:H/AT:P/PR:H/UI:N/VC:H/VI:H/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-287 Added Reference https://intel.com/content/www/us/en/security-center/advisory/intel-sa-01436.html
EPSS is a daily estimate of the probability of exploitation activity
being observed over the next 30 days. Following chart shows the EPSS
score history of the vulnerability.