CVE-2021-22017Rhttproxy as used in vCenter Server contains a vulnerability due to improper implementation of URI normalization.
Updated under an hour ago ()
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It affects vmware vcenter_server. Add what you run to find out whether that includes you.
CISA lists it as known exploited since Jan 10, 2022; federal agencies had to remediate by Jan 24, 2022. Treat that date as your deadline.
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Rhttproxy as used in vCenter Server contains a vulnerability due to improper implementation of URI normalization. A malicious actor with network access to port 443 on vCenter Server may exploit this issue to bypass proxy leading to internal endpoints being accessed.
- CVSS
- 5.3 MEDIUM (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- Weakness (CWE)
- Not given
- Known exploited
- Added to CISA KEV Jan 10, 2022; federal remediation due Jan 24, 2022Apply updates per vendor instructions.
- EPSS (exploitation in the next 30 days)
- 49.18% (percentile 99)
- Assigned by
- vmware
- NVD analysis
- Analyzed
- Record last updated
- Oct 21, 2025
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
vmware vcenter_server vmware:vcenter_server | 6.7 | NVD |
References
- https://www.vmware.com/security/advisories/VMSA-2021-0020.htmlx-refsource-misc, patch, vendor-advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-22017us-government-resource
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.