CVE-2021-1656
MediumPublished
TPM Device Driver Information Disclosure Vulnerability
- Published
- Jan 12, 2021
- Updated
- Oct 8, 2024
- Assigning CNA
- microsoft
- Evidence observed
- Aug 5, 2026
Primary CVSS
5.5/ 10Medium
nvd · CVSS 3.1
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N3.0%
Low · next 30 days
- Percentile
- 86.8%
- Model date
- Sep 21, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
TPM Device Driver Information Disclosure Vulnerability
Sources
1Proof-of-concept exploit for CVE-2021-1656, an information disclosure vulnerability in the Windows TPM driver (tpm.sys). Demonstrates kernel memory leak via crafted IOCTL requests.
Responsible use
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