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.
History

Wed, 03 Jun 2026 02:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}


cve-icon MITRE

Status: PUBLISHED

Assigner: vmware

Published: 2021-02-24T16:57:33.000Z

Updated: 2026-06-02T20:00:52.080Z

Reserved: 2021-01-04T00:00:00.000Z

Link: CVE-2021-21974

cve-icon Vulnrichment

Updated: 2024-08-03T18:30:23.578Z

cve-icon NVD

Status : Modified

Published: 2021-02-24T17:15:16.017

Modified: 2026-06-02T21:16:24.723

Link: CVE-2021-21974

cve-icon Redhat

Severity : Important

Publid Date: 2021-02-24T00:00:00Z

Links: CVE-2021-21974 - Bugzilla