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CVE-2021-21995

HIGH · CVSS 7.5EPSS 1.0%EU EUVD

OpenSLP as used in ESXi has a denial-of-service vulnerability due a heap out-of-bounds read issue. A malicious actor with network access to port 427 on ESXi may be able to trigger a heap out-of-bounds read in OpenSLP service resulting in a denial-of-service condition.

Key facts

CVSS score
7.5 (v3.1)
Severity
HIGH
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE)
CWE-125
EPSS score
1.0% (61th percentile)
In CISA KEV
No
In EU EUVD
Yes (EUVD-2021-9166)
Published
July 13, 2021
NVD last modified
June 17, 2026
Status
Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2021-9166 in the EU Vulnerability Database. Last updated in EUVD on August 3, 2024.

View on the EU Vulnerability Database

Affected products

  • vmware / cloud foundation
  • vmware / cloud foundation
  • vmware / esxi
  • vmware / esxi
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  • vmware / esxi
  • vmware / esxi

and 188 more…

Certified products that may be affected

1 FIPS 140 or Common Criteria certified product, from automated matching by sec-certs.org.

References

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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