Medium severity · published Aug 21, 2020
CVE-2020-3976
VMware ESXi and vCenter Server contain a partial denial of service vulnerability in their respective authentication services
5.3
CVSS
2.1%
EPSS
No
On KEV
Description
VMware ESXi and vCenter Server contain a partial denial of service vulnerability in their respective authentication services. VMware has evaluated the severity of this issue to be in the Moderate severity range with a maximum CVSSv3 base score of 5.3.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)2.1% · higher than 82% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
ES
ESXi · VMware
6.5; 6.5; 6.5; 6.5; 6.5; 6.5; +34 more · source: NVD
VS
vCenter Server · VMware
6.5; 6.5; 6.5; 6.5; 6.5; 6.5; +31 more · source: NVD
CF
Cloud Foundation · Vmware
3.0 before 3.10; 4.0 before 4.0.1 · source: NVD
Affected product
ES
ESXi
VMware
More from ESXi
9.8
CVE-2020-3992
VMware ESXi OpenSLP Use-After-Free Vulnerability
9.8
CVE-2019-5544
VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow Vulnerability
8.2
CVE-2025-22225
VMware ESXi Arbitrary Write Vulnerability
8.2
CVE-2025-22224
VMware ESXi and Workstation TOCTOU Race Condition Vulnerability
7.8
CVE-2010-3904
Linux Kernel Improper Input Validation Vulnerability