What’s Vulnerable › Vulnerabilities

CVE-2021-21998

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 10.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-06-23 · updated 2026-06-17
• Weakness: CWE-287

Description

VMware Carbon Black App Control 8.0, 8.1, 8.5 prior to 8.5.8, and 8.6 prior to 8.6.2 has an authentication bypass. A malicious actor with network access to the VMware Carbon Black App Control management server might be able to obtain administrative access to the product without the need to authenticate.

Affected products

• VMware Carbon Black App Control (AppC): from 8.5 before 8.5.8; from 8.6 before 8.6.2; 8.0, 8.1 — fixed in 8.5.8, 8.6.2
• VMware Carbon Black App Control (AppC): from VMware Carbon Black App Control 8.0, 8.1, 8.5 prior through 8.5.8, and 8.6 prior to 8.6.2

How to fix

Upgrade to a fixed version: VMware Carbon Black App Control (AppC) 8.5.8, 8.6.2. Check the vendor advisory for mitigations.

References

• https://www.vmware.com/security/advisories/VMSA-2021-0012.html?
• https://www.vmware.com/security/advisories/VMSA-2021-0012.html?

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