OpenSLP as used in ESXi (7.0 before ESXi70U1c-17325551, 6.7 before ESXi670-202102401-SG, 6.5 before ESXi650-202102101-SG) has a heap-overflow vulnerability. A malicious actor residing within the same network segment as ESXi who has access to port 427 may be able to trigger the heap-overflow issue in OpenSLP service resulting in remote code execution.
https://www.vmware.com/security/advisories/VMSA-2021-0002.html
https://www.zerodayinitiative.com/advisories/ZDI-21-250/
http://packetstormsecurity.com/files/162957/VMware-ESXi-OpenSLP-Heap-Overflow.html
Source: MITRE
Published: 2021-02-24
Updated: 2022-06-02
Type: CWE-787
Base Score: 5.8
Vector: AV:A/AC:L/Au:N/C:P/I:P/A:P
Impact Score: 6.4
Exploitability Score: 6.5
Severity: MEDIUM
Base Score: 8.8
Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Impact Score: 5.9
Exploitability Score: 2.8
Severity: HIGH