CVE-2019-16863

Name: CVE-2019-16863
Creator: NVD / NIST
Published: 2019-11-14T03:15:11.51+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.9/10EPSS 3.25%

Last modified Jun 17, 2026

CVE-2019-16863 is a medium-severity vulnerability rated 5.9/10 on the CVSS scale. 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.. EPSS estimates a 3.25% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

5.9/10

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS Probability

3.25%

86.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
St	St33tphf2espi Firmware	71.0
St	St33tphf2espi Firmware	71.4
St	St33tphf2espi Firmware	71.12
St	St33tphf2espi Firmware	73.0
St	St33tphf2espi Firmware	73.4
St	St33tphf2espi Firmware	73.8
St	St33tphf2ei2c Firmware	73.5
St	St33tphf2ei2c Firmware	73.9
St	St33tphf20spi Firmware	74.0
St	St33tphf20spi Firmware	74.4
St	St33tphf20spi Firmware	74.8
St	St33tphf20spi Firmware	74.16
St	St33tphf20i2c Firmware	74.5
St	St33tphf20i2c Firmware	74.9

References

http://tpm.failThird Party Advisory
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/ADV190024Third Party Advisory
https://support.f5.com/csp/article/K32412503?utm_source=f5support&amp%3Butm_medium=RSS
https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03972en_usThird Party Advisory
https://support.lenovo.com/us/en/product_security/LEN-29406Third Party Advisory
https://www.st.com/content/st_com/en/campaigns/tpm-update.htmlVendor Advisory
http://tpm.failThird Party Advisory
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/ADV190024Third Party Advisory
https://support.f5.com/csp/article/K32412503?utm_source=f5support&amp%3Butm_medium=RSS
https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03972en_usThird Party Advisory
https://support.lenovo.com/us/en/product_security/LEN-29406Third Party Advisory
https://www.st.com/content/st_com/en/campaigns/tpm-update.htmlVendor Advisory

Timeline

Published: Nov 14, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-16863?

How severe is CVE-2019-16863?

CVE-2019-16863 has a CVSS score of 5.9/10 (MEDIUM severity). The EPSS model estimates a 3.25% probability of exploitation in the next 30 days.

How do I fix CVE-2019-16863?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-16863?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST