5.9

CVE-2019-16863: st st33tphf20i2c_firmware Observable Discrepancy

CVSS: 5.9v3.1MediumModified
Published 14-11-2019Last modified 05-08-2024
Open JSON

Vulnerability summary

CVE-2019-16863 is a medium (CVSS 5.9) Observable Discrepancy vulnerability in st st33tphf20i2c_firmware. EPSS estimates a 3.41% chance of exploitation in the next 30 days, higher than 88.7% of scored vulnerabilities.

Overall risk
24/100
0100
Low · default modelHow is this calculated?
CVSS score
5.9/10
010
Medium · v3.1 (NVD)
EPSS score
3.41%
0%100%
Low · +0.13 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 14-11-2019
    PublishedVulnerability first disclosed.
  2. 05-08-2024
    Last modifiedVulnerability information updated.

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.

CVSS metrics

2 scores · 1 source · 2 versions

EPSS trend

Probability

3.41%

Chance of exploitation in the next 30 days

Percentile

89%

Versus all other CVEs

30-day change

+0.13 pp

From 3.28% on 19-09-2026

19-09-202619-10-2026
EPSS score
3.41%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

St4 products

1 vendor · 4 products

References

6 links