TPM2.0: Incorrect Type Conversion or Cast
CVE-2026-6726 is a high-severity incorrect type conversion or cast vulnerability in TPM2.0 from Trusted Computing Group, with a CVSS 3.1 base score of 7.9 out of 10. It can be exploited with local access to the system by an attacker with administrator privileges, without any action from a user. Affected TPM2.0 versions: v184 and earlier. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.19% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Check which version of TPM2.0 you run against the affected versions below, and install the vendor's latest release.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Trusted Computing Group | TPM2.0 | v184 and earlier | Not stated |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- LocalThe attacker needs local access or must trick a user into running something.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- HighAdministrator-level access is required first.
- User interaction
- NoneNo action by a victim is required.
- Scope
- ChangedThe attack can reach beyond the vulnerable component into other systems.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- NoneAvailability is not affected.
Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N. Scored by CISA (ADP).
Official description
An information leakage vulnerability was reported in the TCG TPM 2.0 reference code that could allow a local attacker with elevated privileges to obtain a credential from a TPM-aware CA for a falsified TPM key (such as an Attestation Key, DevID Key or TLS authentication key) and falsify other TPM 2.0 attestations with this key. See also TCG VRT0010.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Incorrect Type Conversion or Cast
The product does not correctly convert an object, resource, or structure from one type to a different type.
More Incorrect Type Conversion or Cast vulnerabilities (CWE-704)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Other references
Other vulnerabilities in TPM2.0
- 7.8 High severity
Recent Incorrect Type Conversion or Cast vulnerabilities
- 7.5 High severity
- 7.5 High severity
- 7.1 High severity
- 7.2 High severity
- 7.2 High severity
- 7.1 High severity
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