Security readout for executives and security teams
This Zoom vulnerability is a buffer overflow affecting many Zoom clients, Rooms, VDI plug-ins, SDKs, and on-premise or hybrid components before the listed fixed versions. A malicious actor could crash affected software or potentially execute arbitrary code. The CVSS score is 7.3, high severity. Exposure is most likely in organizations running outdated Zoom desktop, mobile, Rooms, VDI, SDK, on-premise connector, or hybrid components. Environments with unmanaged endpoints, conference rooms, virtual desktop infrastructure, or embedded Zoom SDK applications need targeted inventory checks. Handle as a high-priority remediation item, especially where Zoom is broadly deployed or supports executive meetings, conference rooms, VDI, or customer-facing applications. The main business risk is disruption from crashes, with potential code execution noted by the CVE record. Mitigation focus: Upgrade each affected Zoom product to the fixed version or later named in the CVE description.; Prioritize managed Zoom clients, Zoom Rooms, VDI plug-ins, SDK-based apps, and on-premise connectors.; Check Zoom security bulletins for product-specific upgrade guidance and any superseding vendor instructions..
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
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ATT&CK lookup starting points
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Execution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-34423 mapping review
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Open ATT&CK lookup- Severity
- High
- CVSS
- 7.3 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
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:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L3.93.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
7.3HighVector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
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.