MEDIUM
CVE-2019-16863
CWE-203Published: November 14, 2019· Updated: Jun 17, 2026
5.9
CVSS v3.1
Official 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.
Technical Analysis
CVE-2019-16863 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.
A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 5.9.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorNetwork
Attack ComplexityHigh
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Affected Vendors & Products
st8 product(s)
st33tphf2espi firmwarest33tphf2espist33tphf2ei2c firmwarest33tphf2ei2cst33tphf20spi firmwarest33tphf20spist33tphf20i2c firmwarest33tphf20i2c
Source: NVD CPE · 18 total CPE entries
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.
Official Patches & Advisories
All References (12)
→
http://tpm.failThird Party Advisory
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https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/ADV190024Third Party Advisory
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https://support.lenovo.com/us/en/product_security/LEN-29406Third Party Advisory
→
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http://tpm.failThird Party Advisory
→
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/ADV190024Third Party Advisory
→
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https://support.lenovo.com/us/en/product_security/LEN-29406Third Party Advisory
→
Quick Facts
CVE IDCVE-2019-16863
CVSS Score5.9 / 10
SeverityMEDIUM
WeaknessCWE-203
CISA KEVNo
Affected1 vendor(s)
PublishedNov 14, 2019
Related CVEs (CWE-203)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2019-16863 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.