CVE-2021-34417
No exploitation reported by the sources we read.
- Published2021-11-11
- Fixed in4.6.365.20210703
- WeaknessCWE-20
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
Description
The network proxy page on the web portal for the Zoom On-Premise Meeting Connector Controller before version 4.6.365.20210703, Zoom On-Premise Meeting Connector MMR before version 4.6.365.20210703, Zoom On-Premise Recording Connector before version 3.8.45.20210703, Zoom On-Premise Virtual Room Connector before version 4.4.6868.20210703, and Zoom On-Premise Virtual Room Connector Load Balancer before version 2.5.5496.20210703 fails to validate input sent in requests to set the network proxy password. This could lead to remote command injection by a web portal administrator.
Timeline
dates in UTC- 2021-11-1123:15CVE publishedNVD
Observed activity
isMalicious corpus · updated 2026-10-23 18:48 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2021-34417?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-34417?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 4.6 | < 4.6.365.20210703 | 4.6.365.20210703 | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 4.6 | < 4.6.365.20210703 | 4.6.365.20210703 | NVD |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 3.8 | < 3.8.45.20210703 | 3.8.45.20210703 | NVD |
2 more products in the sources.
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Fix
- Update Zoom zoom on-premise meeting connector controller to 4.6.365.20210703
Advisories and patches
- explore.zoom.usVendor Advisory
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
- CNACVSS 3.17.9read 2026-10-23
- NVDCVSS 3.17.2read 2026-10-23
- NVDCVSS 2.09read 2026-10-23
- NVDweakness (CWE)CWE-20read 2026-10-23
- FIRST EPSSEPSS score1.2 %2026-10-22
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
- Published
- 2021-11-11
- Last Modified
- 2026-06-17
- NVD status
- Modified
Frequently asked questions
What is CVE-2021-34417?
Is CVE-2021-34417 actively exploited?
What is the CVSS score for CVE-2021-34417?
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Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.