Security readout for executives and security teams
Plain-English summary
Older Zoom Plugin for Microsoft Outlook for Mac installers unpacked an application bundle that users could write to, creating a path to gain root privileges on a Mac. This is an endpoint privilege-escalation issue, not a remote internet-facing server flaw.
Executive priority
Address this in endpoint hygiene and legacy software cleanup. Urgency is highest where affected Macs are shared, administratively used, or still rely on old Zoom Outlook plugin packages.
Technical view
CVE-2021-34410 affects Zoom Plugin for Microsoft Outlook for Mac before 5.0.25611.0521. The CVE describes a user-writable application bundle unpacked during installation that allows privilege escalation to root. No CVSS, CWE, or detailed exploit prerequisites are provided in the source bundle.
Likely exposure
Exposure is limited to macOS systems with the Zoom Plugin for Microsoft Outlook for Mac installed below 5.0.25611.0521, especially legacy managed endpoints or stale software images.
Exploitation context
The provided sources do not show CISA KEV listing or active exploitation. Treat this as a local privilege-escalation risk with incomplete public detail, not as confirmed in-the-wild activity.
Researcher notes
Public detail is sparse: the source bundle identifies affected versions and root privilege escalation, but not CVSS, CWE, exploit mechanics, or confirmed exploitation. Avoid assuming broader Zoom product impact beyond the named Outlook Mac plugin.
Mitigation direction
- Upgrade the Zoom Plugin for Microsoft Outlook for Mac to 5.0.25611.0521 or later.
- Remove the Outlook plugin where it is no longer needed.
- Check Zoom’s security bulletin for any newer vendor guidance.
- Prioritize managed Macs with legacy Zoom or Outlook plugin deployments.
Validation and detection
- Inventory macOS endpoints for the Zoom Plugin for Microsoft Outlook for Mac.
- Confirm installed plugin versions are 5.0.25611.0521 or later.
- Check endpoint management software images for bundled vulnerable plugin versions.
- Review installation records for outdated plugin deployments on shared or privileged Macs.
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.
Privilege behavior lookup
The CVE wording references privilege impact, so privilege escalation and authorization behavior review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-34410 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
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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 and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://explore.zoom.us/en/trust/security/security-bulletin/CVE reference · x_refsource_CONFIRM
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.