What is the CVSS score of CVE-2026-30900?

CVE-2026-30900 has a CVSS 3.1 base score of 7.8 (High). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.0%.

Which versions of Microsoft are affected by CVE-2026-30900?

CVE-2026-30900 affects Zoom Clients for Windows and allows authenticated users to escalate privileges through a flaw in update version checking.

How to fix or mitigate CVE-2026-30900?

Within 24 hours: Inventory all Windows Zoom client deployments and identify systems where users have local administrative rights. Within 7 days: Implement application whitelisting or restrict Zoom client execution to non-administrative users where operationally feasible; communicate patch availability timelines to stakeholders. Within 30 days: Apply vendor patch immediately upon release; conduct privilege access reviews for affected users and audit Zoom process execution logs for suspicious activity.

Microsoft CVE-2026-30900

HIGH

Improper Check for Unusual or Exceptional Conditions (CWE-754)

2026-03-11 security@zoom.us

Privilege Escalation Microsoft

7.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

7.8 HIGH

AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 22:06 vuln.today

CVE Published

Mar 11, 2026 - 15:16 nvd

HIGH 7.8

DescriptionCVE.org

Improper Check of minimum version in update functionality of certain Zoom Clients for Windows may allow an authenticated user to conduct an escalation of privilege via local access.

AnalysisAI

Zoom's Windows client fails to properly validate minimum version requirements during updates, enabling authenticated local users to escalate their privileges on affected systems. An attacker with local access and valid credentials could exploit this validation bypass to gain elevated permissions. No patch is currently available for this vulnerability.

Technical ContextAI

This vulnerability (CWE-754: Improper Check for Unusual or Exceptional Conditions) exists in the update component. Improper Check of minimum version in update functionality of certain Zoom Clients for Windows may allow an authenticated user to conduct an escalation of privilege via local access.