CVE-2021-21974
HIGH EXPLOITED IN THE WILD RANSOMWAREVmware Esxi < 3.10.1.2 - Out-of-Bounds Write
Title source: ruleDescription
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.
Exploits (7)
nomisec
SCANNER
2 stars
by CYBERTHREATANALYSIS · poc
https://github.com/CYBERTHREATANALYSIS/ESXi-Ransomware-Scanner-mi
nomisec
SCANNER
by abirasecurity · poc
https://github.com/abirasecurity/CVE-2021-21974_vuln_dectection
References (3)
Scores
CVSS v3
8.8
EPSS
0.5570
EPSS Percentile
98.1%
Attack Vector
ADJACENT_NETWORK
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Details
VulnCheck KEV
2023-02-03
InTheWild.io
2023-02-03
Ransomware Use
Confirmed
CWE
CWE-787
Status
published
Products (2)
vmware/cloud_foundation
3.0 - 3.10.1.2
vmware/esxi
6.5 (49 CPE variants)
Published
Feb 24, 2021
Tracked Since
Feb 18, 2026