Intel TDX Migration Trust Domain MigTD rebinding protocol improper authentication

Summaryinfo

A vulnerability was found in Intel TDX Migration Trust Domain. It has been rated as very critical. This impacts an unknown function of the component MigTD rebinding protocol. The manipulation leads to improper authentication. This vulnerability is uniquely identified as CVE-2026-44685. Local access is required to approach this attack. No exploit exists.

Detailsinfo

A vulnerability, which was classified as very critical, has been found in Intel TDX Migration Trust Domain (version unknown). This issue affects an unknown function of the component MigTD rebinding protocol. The manipulation with an unknown input leads to a improper authentication vulnerability. Using CWE to declare the problem leads to CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Authentication bypass by spoofing in the MigTD rebinding protocol for the Intel(R) TDX Migration Trust Domain (MigTD) within Ring 0: Hypervisor may allow an escalation of privilege. System software adversary with a privileged user combined with a low complexity attack may enable local code execution. 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 (high) of the vulnerable system, resulting in subsequent system confidentiality (high), integrity (high) and availability (high) impacts.

The advisory is shared at intel.com. The identification of this vulnerability is CVE-2026-44685 since 07/15/2026. The exploitation is known to be easy. An attack has to be approached locally. Additional levels of successful authentication are required for exploitation. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 11/10/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

• Intel

Name

• TDX Migration Trust Domain

License

• commercial

Website

• Vendor: https://www.intel.com/

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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