7.8

CVE-2021-21991: vmware cloud_foundation

CVSS: 7.8v3.1HighModified
Published 22-09-2021Last modified 03-08-2024
Open JSON

Vulnerability summary

CVE-2021-21991 is a high (CVSS 7.8) vulnerability in vmware cloud_foundation. EPSS estimates a 0.32% chance of exploitation in the next 30 days, higher than 23% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.8/10
010
High · v3.1 (NVD)
EPSS score
0.32%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 22-09-2021
    PublishedVulnerability first disclosed.
  2. 03-08-2024
    Last modifiedVulnerability information updated.

Description

The vCenter Server contains a local privilege escalation vulnerability due to the way it handles session tokens. A malicious actor with non-administrative user access on vCenter Server host may exploit this issue to escalate privileges to Administrator on the vSphere Client (HTML5) or vCenter Server vSphere Web Client (FLEX/Flash).

CVSS metrics

2 scores · 1 source · 2 versions

EPSS trend

Probability

0.32%

Chance of exploitation in the next 30 days

Percentile

23%

Versus all other CVEs

30-day change

0.00 pp

From 0.32% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.32%

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

No weakness data has been published for this record.

Affected systems

Vmware2 products
  • cloud_foundation≥ 3.0, < 3.10.2.2 | ≥ 4.0, < 4.3
  • 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 | 6.5:update3p | 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 | 6.7:update3n | 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 | 7.0:update2b

1 vendor · 2 products

References

1 links