What is the CVSS score of CVE-2025-30663?

CVE-2025-30663 has a CVSS 3.1 base score of 8.8 (High). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H. EPSS exploitation probability: 0.0%.

How to fix or mitigate CVE-2025-30663?

Within 30 days: Identify all affected systems and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.

Zoom CVE-2025-30663

HIGH

Time-of-check Time-of-use (TOCTOU) Race Condition (CWE-367)

2025-05-14 security@zoom.us

Privilege Escalation Zoom Workplace Desktop Meeting Software Development Kit Rooms Rooms Controller Workplace Workplace Virtual Desktop Infrastructure

8.8

CVSS 3.1 · NVD

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Vulnerability Assessment

Weakness	CWE CWE-367 OWASP Top 10:2025 A04:2021 - Insecure Design ASVS 5.0 V15 - Secure Coding and Architecture TOCTOU prevention
Impact	CVSS score of 8.8 (HIGH). Attack characteristics: local attack vector, low complexity, low privileges required, no user interaction not required. EPSS exploitation probability: 0.04%.
Exploit ScenarioDerived	Successful exploitation could compromise the high-severity affected system.

This Month Plan within 30 days. Why: HIGH severity (CVSS 7.0-8.9).

No patch listed yet 0.0% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 28, 2026

Time-of-check time-of-use race condition in some Zoom Workplace Apps may allow an authenticated user to conduct an escalation of privilege via local access. Rated high severity (CVSS 8.8), this vulnerability is low attack complexity. No vendor patch available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

This vulnerability is classified under CWE-367. Time-of-check time-of-use race condition in some Zoom Workplace Apps may allow an authenticated user to conduct an escalation of privilege via local access. Affected products include: Zoom Meeting Software Development Kit, Zoom Rooms, Zoom Rooms Controller, Zoom Workplace, Zoom Workplace Desktop.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 8.8 HIGH

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

DescriptionCVE.org

Time-of-check time-of-use race condition in some Zoom Workplace Apps may allow an authenticated user to conduct an escalation of privilege via local access.

Executive ViewAI

Why It Matters

CVE-2025-30663 presents significant security risk rated CVSS 8.8. Successful exploitation could significantly impact the confidentiality, integrity, or availability of affected systems. Organizations should apply vendor updates when available and consider compensating controls in the interim.

Business Impact: Severe

Compensating Controls

Apply vendor patch. If immediate patching is not feasible: (1) Implement network-level access controls to limit exposure; (2) Enable enhanced monitoring and alerting; (3) Apply principle of least privilege.

Threat Intelligence Overview

EPSS Score

0.0%

Top 86% exploitable

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity HIGH

CISA KEV No

Public POC No

EPSS 0.0%

Patch available No

Active threat No

Deciding rule

HIGH severity (CVSS 7.0-8.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Scheduled

Exploitation· derived

None

System Exposure· derived

Small

Automatable· derived

Human Impact

Very High

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +44

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Privilege Escalation HIGH

Privilege escalation occurs when an attacker leverages flaws in access control mechanisms to gain permissions beyond what they were originally granted.

Affected Products (CPE)CVE.org

cpe:2.3:a:zoom:meeting_software_development_kit:*:*:*:*:*:android:*:*

cpe:2.3:a:zoom:meeting_software_development_kit:*:*:*:*:*:iphone_os:*:*

cpe:2.3:a:zoom:meeting_software_development_kit:*:*:*:*:*:linux:*:*

cpe:2.3:a:zoom:meeting_software_development_kit:*:*:*:*:*:macos:*:*

cpe:2.3:a:zoom:meeting_software_development_kit:*:*:*:*:*:windows:*:*

cpe:2.3:a:zoom:rooms:*:*:*:*:*:android:*:*

cpe:2.3:a:zoom:rooms:*:*:*:*:*:ipados:*:*

cpe:2.3:a:zoom:rooms:*:*:*:*:*:macos:*:*

cpe:2.3:a:zoom:rooms:*:*:*:*:*:windows:*:*

cpe:2.3:a:zoom:rooms_controller:*:*:*:*:*:android:*:*

cpe:2.3:a:zoom:rooms_controller:*:*:*:*:*:linux:*:*

cpe:2.3:a:zoom:rooms_controller:*:*:*:*:*:macos:*:*

cpe:2.3:a:zoom:rooms_controller:*:*:*:*:*:windows:*:*

cpe:2.3:a:zoom:workplace:*:*:*:*:*:android:*:*

cpe:2.3:a:zoom:workplace:*:*:*:*:*:iphone_os:*:*

cpe:2.3:a:zoom:workplace_desktop:*:*:*:*:*:linux:*:*

cpe:2.3:a:zoom:workplace_desktop:*:*:*:*:*:macos:*:*

cpe:2.3:a:zoom:workplace_desktop:*:*:*:*:*:windows:*:*

cpe:2.3:a:zoom:workplace_virtual_desktop_infrastructure:*:*:*:*:*:windows:*:*

+ 1 more

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Same weakness CWE-367 – Time-of-check Time-of-use (TOCTOU) Race Condition

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References

Advisories & patches

ADVISORY https://www.zoom.com/en/trust/security-bulletin/zsb-25016

Search Externally

GitHub PoC

Exploit-DB PacketStorm Snyk Rapid7 Nuclei Templates Trickest PoC

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