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Fencer Intel
high 7.9

CVE-2021-34417 json

Authenticated remote command execution with root privileges via web console in MMR

published 4y ago modified 4mo ago also EUVD-2021-21075

cvss
7.9
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.2%
EPSS 1.2% chance of exploitation in 30 days, percentile 69%
public exploits
0
none known

Summary

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.

Patch / fix

  • Zoom Video Communications Inc Zoom On-Premise Meeting Connector Controller 4.6.365.20210703
  • Zoom Video Communications Inc Zoom On-Premise Meeting Connector MMR 4.6.365.20210703
  • Zoom Video Communications Inc Zoom On-Premise Recording Connector 3.8.45.20210703
  • Zoom Video Communications Inc Zoom On-Premise Virtual Room Connector 4.4.6868.20210703
  • Zoom Video Communications Inc Zoom On-Premise Virtual Room Connector Load Balancer 2.5.5496.20210703

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Exploit prediction

1.24% chance of exploitation in the next 30 days, higher than 69% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 7.9 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N
NVD 3.1 7.2 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 9.0 AV:N/AC:L/Au:S/C:C/I:C/A:C

Affected products

  • Zoom Video Communications Inc Zoom On-Premise Meeting Connector Controller
  • Zoom Video Communications Inc Zoom On-Premise Meeting Connector MMR
  • Zoom Video Communications Inc Zoom On-Premise Recording Connector
  • Zoom Video Communications Inc Zoom On-Premise Virtual Room Connector
  • Zoom Video Communications Inc Zoom On-Premise Virtual Room Connector Load Balancer

Classification

Weakness
  • CWE-20 Improper Input Validation

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.