CVE-2021-21991
Last modified
CVE-2021-21991 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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).. EPSS estimates a 0.31% chance of exploitation in the next 30 days.
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).
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Vmware | Cloud Foundation | >= 3.0, < 3.10.2.2 |
| Vmware | Cloud Foundation | >= 4.0, < 4.3 |
| Vmware | Vcenter Server | 6.5 |
| Vmware | Vcenter Server | 6.7 |
| Vmware | Vcenter Server | 7.0 |
References
- https://www.vmware.com/security/advisories/VMSA-2021-0020.htmlPatch, Vendor Advisory
- https://www.vmware.com/security/advisories/VMSA-2021-0020.htmlPatch, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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