CVE-2021-21974
75Vexday Risk Score
Prioritize patching. It exploitation observed by VulnCheck, has a public proof of concept and 1 threat group(s) use it.
ssvc Actcvss 8.8epss 45%
from disclosure to weapon90 days
Published on NVDFeb 24
1st PoC+90d
VulnCheck+709d
exploitation probability
45%top 1% of all CVEs
observed exploitation
yesVulnCheck
1 group(s)3 public exploit(s)
Who exploits it — 1
Groups known to exploit this vulnerability (MITRE ATT&CK attribution).
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.
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
public PoCs found — 3
vulncheckvulncheck.com/xdb/fdfbf9fc812eunverifiedvulncheckvulncheck.com/xdb/675899c043d5unverifiedvulncheckvulncheck.com/xdb/84fbb90c6590unverified⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.