How severe is CVE-2021-22050?

CVE-2021-22050 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2021-22050 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-22050?

CVE-2021-22050 primarily affects Vmware Cloud Foundation. In total, 164 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-22050?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-22050 published?

CVE-2021-22050 was published on 2022-02-16 and last updated on 2026-06-17.

CVE-2021-22050

CVE-2021-22050 is a high-severity vulnerability in Vmware Cloud Foundation with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-770.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 2% (81st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-770
Affected product: Vmware Cloud Foundation
Published: 2022-02-16
Last modified: 2026-06-17

Description

ESXi contains a slow HTTP POST denial-of-service vulnerability in rhttpproxy. A malicious actor with network access to ESXi may exploit this issue to create a denial-of-service condition by overwhelming rhttpproxy service with multiple requests.

Frequently asked questions

What is CVE-2021-22050?: ESXi contains a slow HTTP POST denial-of-service vulnerability in rhttpproxy. A malicious actor with network access to ESXi may exploit this issue to create a denial-of-service condition by overwhelming rhttpproxy service with multiple requests.
How severe is CVE-2021-22050?: CVE-2021-22050 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2021-22050 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-22050?: CVE-2021-22050 primarily affects Vmware Cloud Foundation. In total, 164 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-22050?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-22050 published?: CVE-2021-22050 was published on 2022-02-16 and last updated on 2026-06-17.

References

https://www.vmware.com/security/advisories/VMSA-2022-0004.html

Affected products (164)

cpe:2.3:a:vmware:cloud_foundation:*:*:*:*:*:*:*:*
cpe:2.3:o:vmware:esxi:6.5:-:*:*:*:*:*:*
cpe:2.3:o:vmware:esxi:6.7:-:*:*:*:*:*:*
cpe:2.3:o:vmware:esxi:6.7:670-201806001:*:*:*:*:*:*
cpe:2.3:o:vmware:esxi:6.7:670-201807001:*:*:*:*:*:*
cpe:2.3:o:vmware:esxi:6.7:670-201808001:*:*:*:*:*:*
cpe:2.3:o:vmware:esxi:6.7:670-201810001:*:*:*:*:*:*
cpe:2.3:o:vmware:esxi:6.7:670-201810101:*:*:*:*:*:*
cpe:2.3:o:vmware:esxi:6.7:670-201810102:*:*:*:*:*:*
cpe:2.3:o:vmware:esxi:6.7:670-201810103:*:*:*:*:*:*
cpe:2.3:o:vmware:esxi:6.7:670-201810201:*:*:*:*:*:*
cpe:2.3:o:vmware:esxi:6.7:670-201810202:*:*:*:*:*:*
cpe:2.3:o:vmware:esxi:6.7:670-201810203:*:*:*:*:*:*
cpe:2.3:o:vmware:esxi:6.7:670-201810204:*:*:*:*:*:*
cpe:2.3:o:vmware:esxi:6.7:670-201810205:*:*:*:*:*:*
cpe:2.3:o:vmware:esxi:6.7:670-201810206:*:*:*:*:*:*
cpe:2.3:o:vmware:esxi:6.7:670-201810207:*:*:*:*:*:*
cpe:2.3:o:vmware:esxi:6.7:670-201810208:*:*:*:*:*:*
cpe:2.3:o:vmware:esxi:6.7:670-201810209:*:*:*:*:*:*
cpe:2.3:o:vmware:esxi:6.7:670-201810210:*:*:*:*:*:*
cpe:2.3:o:vmware:esxi:6.7:670-201810211:*:*:*:*:*:*
cpe:2.3:o:vmware:esxi:6.7:670-201810212:*:*:*:*:*:*
cpe:2.3:o:vmware:esxi:6.7:670-201810213:*:*:*:*:*:*
cpe:2.3:o:vmware:esxi:6.7:670-201810214:*:*:*:*:*:*
cpe:2.3:o:vmware:esxi:6.7:670-201810215:*:*:*:*:*:*
cpe:2.3:o:vmware:esxi:6.7:670-201810216:*:*:*:*:*:*
cpe:2.3:o:vmware:esxi:6.7:670-201810217:*:*:*:*:*:*
cpe:2.3:o:vmware:esxi:6.7:670-201810218:*:*:*:*:*:*
cpe:2.3:o:vmware:esxi:6.7:670-201810219:*:*:*:*:*:*
cpe:2.3:o:vmware:esxi:6.7:670-201810220:*:*:*:*:*:*
cpe:2.3:o:vmware:esxi:6.7:670-201810221:*:*:*:*:*:*
cpe:2.3:o:vmware:esxi:6.7:670-201810222:*:*:*:*:*:*
cpe:2.3:o:vmware:esxi:6.7:670-201810223:*:*:*:*:*:*
cpe:2.3:o:vmware:esxi:6.7:670-201810224:*:*:*:*:*:*
cpe:2.3:o:vmware:esxi:6.7:670-201810225:*:*:*:*:*:*
cpe:2.3:o:vmware:esxi:6.7:670-201810226:*:*:*:*:*:*
cpe:2.3:o:vmware:esxi:6.7:670-201810227:*:*:*:*:*:*
cpe:2.3:o:vmware:esxi:6.7:670-201810228:*:*:*:*:*:*
cpe:2.3:o:vmware:esxi:6.7:670-201810229:*:*:*:*:*:*
cpe:2.3:o:vmware:esxi:6.7:670-201810230:*:*:*:*:*:*

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