Security readout for executives and security teams
Plain-English summary
This is a low-severity issue in the Zoom Client for Meetings on Ubuntu Linux before 5.1.0. During an in-meeting screen-sharing remote control request, HTML could be injected into what a participant sees, creating a social engineering risk rather than direct system compromise.
Executive priority
Treat this as routine hygiene unless the organization heavily uses Zoom remote control workflows on unmanaged Ubuntu endpoints. Prioritize version cleanup and user awareness over emergency response.
Technical view
CVE-2021-34419 is an HTML injection flaw affecting Zoom Client for Meetings for Ubuntu Linux before 5.1.0. The vulnerable interaction is a remote control request sent while a user is screen sharing. CVSS 3.1 is 3.7 with low integrity impact and no confidentiality or availability impact listed.
Likely exposure
Exposure is limited to organizations using Zoom Client for Meetings on Ubuntu Linux versions earlier than 5.1.0, especially where screen sharing and remote control requests are used in meetings.
Exploitation context
The source bundle does not identify active exploitation, and CISA KEV status is false. The described risk is targeted social engineering against meeting participants, not a confirmed path to code execution or data theft.
Researcher notes
Evidence is narrow: the CVE record names the vulnerable client, version boundary, interaction, and social engineering impact. No CWE, exploit evidence, or detailed technical advisory is included in the supplied bundle.
Mitigation direction
- Upgrade Ubuntu Linux Zoom clients to version 5.1.0 or later.
- Check Zoom's security bulletin for any current vendor guidance.
- Inventory Linux Zoom clients separately from Windows and macOS clients.
- Review whether remote control features are needed for higher-risk meetings.
Validation and detection
- Confirm all Ubuntu Linux Zoom clients report version 5.1.0 or later.
- Identify users who still run older Linux Zoom packages.
- Verify meeting policies around screen sharing and remote control requests.
- Check vendor and CVE records for any later updates.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2021-34419 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Low
- CVSS
- 3.7 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N2.21.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
3.7LowVector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://explore.zoom.us/en/trust/security/security-bulletinCVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.