low Known exploitedREV. 01
CVE-2023-20867VMware Tools — the host stops proving who it is
A fully compromised ESXi host can make VMware Tools stop authenticating the operations it sends into a guest, which then reach that guest's data and integrity. Root on the host is the price of entry.
Read the risk
THE VITAL STATS- CVSS score
- 3.9/ 10 CVSS v3.1
- EPSS probability
- 14% Likelihood of exploitation
- Attack complexity
- High Conditions needed to exploit
- Known exploited
- Yes — CISA KEV
- CVE published
- 2023-06-13
- Added to KEV
- 2023-06-23
- Exploit published
- Not recorded
- Confidence
- high
- Kill chain
- lateral movement
- MITRE ATT&CK
- T1078
- Severity
- low
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N
Attacker needsThe attacker must already hold root on the ESXi host.
Behind the card
5 REFERENCES- 01CVE recordNVD recordnvd.nist.gov
- 02CISACISA Known Exploited Vulnerabilities catalogcisa.gov
- 03Vendor advisoryopenwall.comopenwall.com
- 04Vendor advisoryopenwall.comopenwall.com
- 05Vendor advisoryvmware.comvmware.com
Field-level provenanceTRACE THE SOURCES +
Which source supports each field, when it was retrieved, and who extracted it.
| Fields | Source | Retrieved | Extractor | Confidence |
|---|---|---|---|---|
| cvss, exploitation.attack_complexity, exploitation.exploit_available, references, published_at | nvd.nist.gov | 2026-09-24 | scrty-crds-pipeline/0.1 | high |
| exploitation.known_exploited, exploitation.kev_added | cisa.gov | 2026-09-24 | scrty-crds-pipeline/0.1 | high |
| epss | api.first.org | 2026-09-24 | scrty-crds-pipeline/0.1 | high |
| title, summary, severity, remediation, mitre_attack, kill_chain, recommended_action, confidence, tags, exploitation.prerequisites | nvd.nist.gov | 2026-09-24 | claude-code | high |
Printing history
THE RECORD- r1Initial base card
First printing. This card has not been reprinted since publication.