CVE-2021-21994 describes an authentication bypass vulnerability in the SFCB component of VMware ESXi and Cloud Foundation. This critical flaw (CVSS 9.8) allows an unauthenticated attacker with network access to port 5989 to bypass authentication by sending a specially crafted request, leading to full compromise of confidentiality, integrity, and availability. While no public exploit code or active exploitation has been observed, the vulnerability has garnered some community discussion and media coverage, indicating awareness within the security community.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 3.0, < 3.10.2CPE matchmatch criteria | cpe:2.3:a:vmware:cloud_foundation:*:*:*:*:*:*:*:* | ||
>= 4.0, < 4.3CPE matchmatch criteria | cpe:2.3:o:vmware:cloud_foundation:*:*:*:*:*:*:*:* | ||
6.5CPE matchmatch criteria | cpe:2.3:o:vmware:esxi:6.5:-:*:*:*:*:*:* | ||
6.5CPE matchmatch criteria | cpe:2.3:o:vmware:esxi:6.5:650-201701001:*:*:*:*:*:* | ||
6.5CPE matchmatch criteria | cpe:2.3:o:vmware:esxi:6.5:650-201703001:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.