CVE-2019-16863

STMicroelectronics ST33TPHF2ESPI TPM devices before 2019-09-12 allow attackers to extract the...

5.9 Medium

STMicroelectronics ST33TPHF2ESPI TPM devices before 2019-09-12 allow attackers to extract the ECDSA private key via a side-channel timing attack because ECDSA scalar multiplication is mishandled, aka TPM-FAIL.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: High
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: None
Availability: None

Exploit likelihood

3.41%Up 2.0 points since Apr 14, 2021

What each source reports

NVD Score used 5.9

Record: CVE-2019-16863
CVSS 3.1: 5.9 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS 2.0: 4.3 MediumAV:N/AC:M/Au:N/C:P/I:N/A:N
Weakness: CWE-203, CWE-327
Updated: 2026-11-02

CVE List No score

Record: CVE-2019-16863
Updated: 2026-11-02

EUVDEUVD-2019-7373 No score

Record: EUVD-2019-7373
Updated: 2026-11-03

GitHub AdvisoriesGHSA-wg83-v62r-wh2x 5.9

STMicroelectronics ST33TPHF2ESPI TPM devices before 2019-09-12 allow attackers to extract the...

Record: GHSA-wg83-v62r-wh2x
CVSS 3.1: 5.9 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness: CWE-327
Updated: 2026-11-02

Affected products

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2019-16863 is a medium vulnerability (CVSS 5.9) in St St33tphf20i2c Firmware, published November 14, 2019. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 3.41%, the 88th percentile. No source names a fixed version.