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CVE-2021-21994 Details
Description
SFCB (Small Footprint CIM Broker) as used in ESXi has an authentication bypass vulnerability. A malicious actor with network access to port 5989 on ESXi may exploit this issue to bypass SFCB authentication by sending a specially crafted request.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://www.vmware.com/security/advisories/VMSA-2021-0014.html | CVE | Vendor Advisory |
| https://www.vmware.com/security/advisories/VMSA-2021-0014.html | [email protected] | Vendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-287 | Improper Authentication | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| vmware cloud foundation | >= 3.0, < 3.10.2 >= 4.0, < 4.3 |
CPE
Remediation
| |
| vmware esxi | 6.5 - 6.5 650-201701001 6.5 650-201703001 6.5 650-201703002 6.5 650-201704001 6.5 650-201707101 6.5 650-201707102 6.5 650-201707103 6.5 650-201707201 6.5 650-201707202 6.5 650-201707203 6.5 650-201707204 6.5 650-201707205 6.5 650-201707206 6.5 650-201707207 6.5 650-201707208 6.5 650-201707209 6.5 650-201707210 6.5 650-201707211 6.5 650-201707212 6.5 650-201707213 6.5 650-201707214 6.5 650-201707215 6.5 650-201707216 6.5 650-201707217 6.5 650-201707218 6.5 650-201707219 6.5 650-201707220 6.5 650-201707221 6.5 650-201710001 6.5 650-201712001 6.5 650-201803001 6.5 650-201806001 6.5 650-201808001 6.5 650-201810001 6.5 650-201810002 6.5 650-201811001 6.5 650-201811002 6.5 650-201811301 6.5 650-201901001 6.5 650-201903001 6.5 650-201905001 6.5 650-201908001 6.5 650-201910001 6.5 650-20191004001 6.5 650-201911001 6.5 650-201911401 6.5 650-201911402 6.5 650-201912001 6.5 650-201912002 6.5 650-201912101 6.5 650-201912102 6.5 650-201912103 6.5 650-201912104 6.5 650-201912301 6.5 650-201912401 6.5 650-201912402 6.5 650-201912403 6.5 650-201912404 6.5 650-202005001 6.5 650-202006001 6.5 650-202007001 6.5 650-202010001 6.5 650-202011001 6.5 650-202011002 6.5 650-202102001 6.5 650-202102002 6.5 650-202102003 6.7 - 6.7 670-201806001 6.7 670-201807001 6.7 670-201808001 6.7 670-201810001 6.7 670-201810101 6.7 670-201810102 6.7 670-201810103 6.7 670-201810201 6.7 670-201810202 6.7 670-201810203 6.7 670-201810204 6.7 670-201810205 6.7 670-201810206 6.7 670-201810207 6.7 670-201810208 6.7 670-201810209 6.7 670-201810210 6.7 670-201810211 6.7 670-201810212 6.7 670-201810213 6.7 670-201810214 6.7 670-201810215 6.7 670-201810216 6.7 670-201810217 6.7 670-201810218 6.7 670-201810219 6.7 670-201810220 6.7 670-201810221 6.7 670-201810222 6.7 670-201810223 6.7 670-201810224 6.7 670-201810225 6.7 670-201810226 6.7 670-201810227 6.7 670-201810228 6.7 670-201810229 6.7 670-201810230 6.7 670-201810231 6.7 670-201810232 6.7 670-201810233 6.7 670-201810234 6.7 670-201811001 6.7 670-201901001 6.7 670-201901401 6.7 670-201901402 6.7 670-201901403 6.7 670-201903001 6.7 670-201904001 6.7 670-201904201 6.7 670-201904201-ug 6.7 670-201904202 6.7 670-201904202-ug 6.7 670-201904203 6.7 670-201904203-ug 6.7 670-201904204 6.7 670-201904204-ug 6.7 670-201904205 6.7 670-201904205-ug 6.7 670-201904206 6.7 670-201904206-ug 6.7 670-201904207 6.7 670-201904207-ug 6.7 670-201904208 6.7 670-201904208-ug 6.7 670-201904209 6.7 670-201904209-ug 6.7 670-201904210 6.7 670-201904210-ug 6.7 670-201904211 6.7 670-201904211-ug 6.7 670-201904212 6.7 670-201904212-ug 6.7 670-201904213 6.7 670-201904213-ug 6.7 670-201904214 6.7 670-201904214-ug 6.7 670-201904215 6.7 670-201904215-ug 6.7 670-201904216 6.7 670-201904216-ug 6.7 670-201904217 6.7 670-201904217-ug 6.7 670-201904218 6.7 670-201904218-ug 6.7 670-201904219 6.7 670-201904219-ug 6.7 670-201904220 6.7 670-201904220-ug 6.7 670-201904221 6.7 670-201904221-ug 6.7 670-201904222 6.7 670-201904222-ug 6.7 670-201904223 6.7 670-201904223-ug 6.7 670-201904224 6.7 670-201904224-ug 6.7 670-201904225 6.7 670-201904225-ug 6.7 670-201904226 6.7 670-201904226-ug 6.7 670-201904227 6.7 670-201904227-ug 6.7 670-201904228 6.7 670-201904228-ug 6.7 670-201904229 6.7 670-201904229-ug 6.7 670-201905001 6.7 670-201906002 6.7 670-201908101 6.7 670-201908102 6.7 670-201908103 6.7 670-201908104 6.7 670-201908201 6.7 670-201908202 6.7 670-201908203 6.7 670-201908204 6.7 670-201908205 6.7 670-201908206 6.7 670-201908207 6.7 670-201908208 6.7 670-201908209 6.7 670-201908210 6.7 670-201908211 6.7 670-201908212 6.7 670-201908213 6.7 670-201908214 6.7 670-201908215 6.7 670-201908216 6.7 670-201908217 6.7 670-201908218 6.7 670-201908219 6.7 670-201908220 6.7 670-201908221 6.7 670-201911001 6.7 670-201912001 6.7 670-201912101 6.7 670-201912102 6.7 670-201912401 6.7 670-201912402 6.7 670-201912403 6.7 670-201912404 6.7 670-201912405 6.7 670-202004001 6.7 670-202004002 6.7 670-202004301 6.7 670-202004401 6.7 670-202004402 6.7 670-202004403 6.7 670-202004404 6.7 670-202004405 6.7 670-202004406 6.7 670-202004407 6.7 670-202004408 6.7 670-202006001 6.7 670-202008001 6.7 670-202010001 6.7 670-202011001 6.7 670-202011002 6.7 670-202102001 6.7 670-202103001 7.0 - 7.0 beta 7.0 update_1 7.0 update_1a 7.0 update_1b 7.0 update_1c 7.0 update_1d |
CPE
Remediation
| |
Change History
6 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Oct 31, 2025 | CPE Deprecation Remap | [email protected] |
| Nov 21, 2024 | CVE Modified | CVE |
| May 14, 2024 | CVE Modified | [email protected] |
| Jun 2, 2022 | Reanalysis | [email protected] |
| Jul 16, 2021 | Initial Analysis | [email protected] |