CVE-2021-21980
The vSphere Web Client (FLEX/Flash) contains an unauthorized arbitrary file read vulnerability. A malicious actor with network access to port 443 on vCenter...
- Published
- Nov 24, 2021
- Updated
- Aug 3, 2024
- Assigning CNA
- vmware
- Evidence observed
- Aug 6, 2026
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:NLow · next 30 days
- Percentile
- 91.4%
- Model date
- Sep 21, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
The vSphere Web Client (FLEX/Flash) contains an unauthorized arbitrary file read vulnerability. A malicious actor with network access to port 443 on vCenter Server may exploit this issue to gain access to sensitive information.
Sources
5- cve-2021-21980-mock-serverDetection
CVE-2021-21980
Nuclei Template and Mock Server for CVE-2021-21980 (vSphere Path Traversal)
- vcenter-cve-2021-21980-labResearch
Realistic vulnerable lab for CVE-2021-21980 (VMware vSphere Path Traversal) - Actual file exploitation, not a mock server
Responsible use
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