Intel TDX MigTD: Authentication bypass by spoofing in rebinding protocol
Summary
The MigTD component of Intel TDX, which evaluates and secures VM migration sessions, contains an authentication bypass by spoofing in its rebinding protocol. According to the CVSS vector, an attacker with privileged local access on a system software level, for example a malicious or compromised hypervisor-side administrator, could escalate privileges and affect confidentiality, integrity and availability. The attack requires no user interaction, but the vulnerability is not remotely exploitable.
Affected
Unknown. The Intel advisory INTEL-SA-01580 could not be verified, so affected MigTD and TDX module versions are not confirmed.
Fixed in
Unknown. Check the advisory and the server OEM firmware packages for fixed versions.
Workaround
- Unknown. No vendor mitigation guidance was verified.
- Restrict privileged access on TDX hosts.
- Disable live migration of trust domains where it is not needed.
Exploitation
Unknown. No known exploitation in the wild, no CISA KEV listing and no public proof of concept at the time of research. The CVE was published on 2026-11-10.
Our recommendation
- Check whether you operate Intel TDX hosts with MigTD, for example Xeon servers running confidential VMs. If not, no action needed.
- Review INTEL-SA-01580 and apply the firmware, TDX module and MigTD updates from your server vendor as soon as they are available.
- Restrict privileged administrative access on affected hosts and disable unneeded live migration.
- Monitor the advisory and NVD for updates.
- Note that the reported CVSS score of 9.3 has not been independently verified; the Intel advisory lists a different severity rating.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Intel Security Advisory INTEL-SA-01580 intel.com
- MigTD GitHub repository github.com
- MigTD releases github.com
- Intel TDX Module 1.5 ABI specification cdrdv2-public.intel.com
Researched and written up in English and German by an AI (Claude by Anthropic) based on NVD, CISA, EPSS and the sources listed. The vendor information is authoritative. Researched on 10 Nov 2026, 19:21.
Original description (NVD)
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.
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
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