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CVE-2021-21986: vmware cloud_foundation

CVSS: 10.0v2.0HighModified
Published 26-05-2021Last modified 03-08-2024
Open JSON

Vulnerability summary

CVE-2021-21986 is a high (CVSS 10.0) vulnerability in vmware cloud_foundation. EPSS estimates a 13.26% chance of exploitation in the next 30 days, higher than 96.3% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
10.0/10
010
High · v2.0 (NVD)
EPSS score
13.26%
0%100%
Medium · +0.35 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 26-05-2021
    PublishedVulnerability first disclosed.
  2. 03-08-2024
    Last modifiedVulnerability information updated.

Description

The vSphere Client (HTML5) contains a vulnerability in a vSphere authentication mechanism for the Virtual SAN Health Check, Site Recovery, vSphere Lifecycle Manager, and VMware Cloud Director Availability plug-ins. A malicious actor with network access to port 443 on vCenter Server may perform actions allowed by the impacted plug-ins without authentication.

CVSS metrics

2 scores · 1 source · 2 versions

EPSS trend

Probability

13.26%

Chance of exploitation in the next 30 days

Percentile

96%

Versus all other CVEs

30-day change

+0.35 pp

From 12.92% on 18-09-2026

18-09-202618-10-2026
EPSS score
13.26%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Vmware2 products
  • cloud_foundation≥ 3.0, < 3.10.2.1 | ≥ 4.0, < 4.2.1
  • vcenter_serverEOL6.5 | 6.5:a | 6.5:b | 6.5:c | 6.5:d | 6.5:e | 6.5:f | 6.5:update1 | 6.5:update1b | 6.5:update1c | 6.5:update1d | 6.5:update1e | 6.5:update1g | 6.5:update2 | 6.5:update2b | 6.5:update2c | 6.5:update2d | 6.5:update2g | 6.5:update3 | 6.5:update3d | 6.5:update3f | 6.5:update3k | 6.5:update3n | 6.7 | 6.7:a | 6.7:b | 6.7:d | 6.7:update1 | 6.7:update1b | 6.7:update2 | 6.7:update2a | 6.7:update2c | 6.7:update3 | 6.7:update3a | 6.7:update3b | 6.7:update3f | 6.7:update3g | 6.7:update3j | 6.7:update3l | 6.7:update3m | 7.0 | 7.0:a | 7.0:b | 7.0:c | 7.0:d | 7.0:update1 | 7.0:update1a | 7.0:update1c | 7.0:update1d | 7.0:update2 | 7.0:update2a

1 vendor · 2 products

References

2 links