CVE-2020-26933
Trusted Computing Group (TCG) Trusted Platform Module Library Family 2.0 Library Specification...
Trusted Computing Group (TCG) Trusted Platform Module Library Family 2.0 Library Specification Revisions 1.38 through 1.59 has Incorrect Access Control during a non-orderly TPM shut-down that uses USE_DA_USED. Improper initialization of this shut-down may result in susceptibility to a dictionary attack.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- High
- Privileges needed
- High
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
Trusted Computing Group (TCG) Trusted Platform Module Library Family 2.0 Library Specification Revisions 1.38 through 1.59 has Incorrect Access Control during a non-orderly TPM shut-down that uses USE_DA_USED. Improper initialization of this shut-down may result in susceptibility to a dictionary attack.
- Record
CVE-2020-26933- CVSS 3.1
- 7.2 High
CVSS:3.1/AC:H/AV:L/A:N/C:H/I:H/PR:H/S:C/UI:N - Updated
- 2026-11-02
EUVDEUVD-2020-19463
Trusted Computing Group (TCG) Trusted Platform Module Library Family 2.0 Library Specification Revisions 1.38 through 1.59 has Incorrect Access Control during a non-orderly TPM shut-down that uses USE_DA_USED. Improper initialization of this shut-down may result in susceptibility to a dictionary attack.
- Record
EUVD-2020-19463- CVSS 3.1
- 7.2 High
CVSS:3.1/AC:H/AV:L/A:N/C:H/I:H/PR:H/S:C/UI:N - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-988w-p627-h6w6 No score
Trusted Computing Group (TCG) Trusted Platform Module Library Family 2.0 Library Specification...
Trusted Computing Group (TCG) Trusted Platform Module Library Family 2.0 Library Specification Revisions 1.38 through 1.59 has Incorrect Access Control during a non-orderly TPM shut-down that uses USE_DA_USED. Improper initialization of this shut-down may result in susceptibility to a dictionary attack.
- Record
GHSA-988w-p627-h6w6- Weakness
- CWE-665
- Updated
- 2026-11-02
NVD
Trusted Computing Group (TCG) Trusted Platform Module Library Family 2.0 Library Specification Revisions 1.38 through 1.59 has Incorrect Access Control during a non-orderly TPM shut-down that uses USE_DA_USED. Improper initialization of this shut-down may result in susceptibility to a dictionary attack.
- Record
CVE-2020-26933- CVSS 3.1
- 7.2 High
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:N - CVSS 3.1
- 6.0 Medium
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N - CVSS 2.0
- 3.6 Low
AV:L/AC:L/Au:N/C:P/I:P/A:N - Weakness
- CWE-665
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2020-26933 is a high vulnerability (CVSS 7.2) in Trustedcomputinggroup Trusted Platform Module, published November 18, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.30%, the 22nd percentile. No source names a fixed version.