CVE-2020-3952: in the CISA KEV catalogue
VMware vCenter Server Information Disclosure Vulnerability. CISA added CVE-2020-3952 to the Known Exploited Vulnerabilities catalogue on 2021-11-03 with a default due date of 2022-05-03. Known ransomware campaign use: Unknown. Forensic triage flag: No.
VMware vCenter Server contains an information disclosure vulnerability in the VMware Directory Service (vmdir) when the Platform Services Controller (PSC) does not correctly implement access controls. Successful exploitation allows an attacker with network access to port 389 to extract sensitive information. (CISA description)
- Vendor / product
- VMware vCenter Server
- CWE
- CWE-306
- CISA required action
- Apply updates per vendor instructions.
- EPSS
- 90%, percentile 99 (scored 2026-11-03)
EPSS puts about 90 in 100 odds (90%) on exploitation activity being observed in the next 30 days. Its score is higher than or equal to that of 99% of scored CVEs. This is a model estimate about exploitation anywhere, not about your environment.
Vendor and reference links (from CISA)
Your own deadline under CISA BOD 26-04 depends on exposure, automatability and technical impact: work it out with the BOD 26-04 calculator.
Frequently asked questions
Is CVE-2020-3952 in the CISA KEV catalogue?
Yes. CISA added CVE-2020-3952 (VMware vCenter Server Information Disclosure Vulnerability) to the Known Exploited Vulnerabilities catalogue on 2021-11-03. CISA's default due date for it is 2022-05-03.
Is CVE-2020-3952 used in ransomware attacks?
CISA marks known ransomware campaign use as Unknown for CVE-2020-3952. That means CISA lacks confirmation, not that ransomware groups do not use it.
What should I do about CVE-2020-3952?
CISA's required action: Apply updates per vendor instructions.
Sources
- CISA, Known Exploited Vulnerabilities Catalog (accessed 2026-11-03)
- FIRST, Exploit Prediction Scoring System (EPSS) (EPSS by FIRST; scores generated by Empirical Security)
- NVD record for CVE-2020-3952