Zoom Workplace Desktop App up to 6.2.x heap-based overflow

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.4$0-$5k0.69

Summaryinfo

A vulnerability has been found in Zoom Workplace Desktop App, Workplace App, VDI Client, Rooms Controller, Rooms Client and Meeting SDK up to 6.2.x and classified as critical. The affected element is an unknown function. This manipulation causes heap-based overflow. The identification of this vulnerability is CVE-2025-27440. It is possible to initiate the attack remotely. There is no exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Zoom Workplace Desktop App, Workplace App, VDI Client, Rooms Controller, Rooms Client and Meeting SDK up to 6.2.x. It has been declared as critical. Affected by this vulnerability is an unknown part. The manipulation with an unknown input leads to a heap-based overflow vulnerability. The CWE definition for the vulnerability is CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Heap overflow in some Zoom Workplace Apps may allow an authenticated user to conduct an escalation of privilege via network access.

It is possible to read the advisory at zoom.com. This vulnerability is known as CVE-2025-27440 since 02/25/2025. The exploitation appears to be difficult. The attack can be launched remotely. A single authentication is necessary for exploitation. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/23/2025).

The vulnerability scanner Nessus provides a plugin with the ID 234440 (Zoom Workplace Desktop App < 6.3.0 Heap-Based Buffer Overflow (ZSB-25012)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.3.0 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (234440). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.4
VulDB Meta Temp Score: 7.4

VulDB Base Score: 5.0
VulDB Temp Score: 4.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.8
NVD Vector: 🔍

CNA Base Score: 8.5
CNA Vector: 🔍

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Heap-based overflow
CWE: CWE-122 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 234440
Nessus Name: Zoom Workplace Desktop App < 6.3.0 Heap-Based Buffer Overflow (ZSB-25012)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Workplace Desktop App/Workplace App/VDI Client/Rooms Controller/Rooms Client/Meeting SDK 6.3.0

Timelineinfo

02/25/2025 🔍
03/11/2025 +14 days 🔍
03/11/2025 +0 days 🔍
10/23/2025 +226 days 🔍

Sourcesinfo

Advisory: zoom.com
Status: Confirmed

CVE: CVE-2025-27440 (🔍)
GCVE (CVE): GCVE-0-2025-27440
GCVE (VulDB): GCVE-100-299239

Entryinfo

Created: 03/11/2025 10:28
Updated: 10/23/2025 03:08
Changes: 03/11/2025 10:28 (36), 03/11/2025 10:29 (20), 04/16/2025 08:02 (2), 10/23/2025 03:08 (22)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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