VDB-320076 · CVE-2025-5942 · nskpsa-2025-003

Netskope Client up to 126.0.8/128.x on Windows epdlpdrv.sys heap-based overflow

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.3	$0-$5k	0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in Netskope Client up to 126.0.8/128.x on Windows. This impacts an unknown function in the library epdlpdrv.sys. The manipulation results in heap-based overflow. This vulnerability is identified as CVE-2025-5942. The attack is only possible with local access. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in Netskope Client up to 126.0.8/128.x on Windows. Affected is an unknown functionality in the library epdlpdrv.sys. The manipulation with an unknown input leads to a heap-based overflow vulnerability. CWE is classifying the issue as 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(). This is going to have an impact on availability. CVE summarizes:

Netskope was notified about a potential gap in its agent (NS Client) on Windows systems. If this gap is successfully exploited, an unprivileged user can trigger a heap overflow in the epdlpdrv.sys driver, leading to a Blue-Screen-of-Death (BSOD). Successful exploitation can also potentially be performed by an unprivileged user whose NS Client is configured to use Endpoint DLP. A successful exploit can result in a denial-of-service for the local machine.

The weakness was released by Thomas Brice as nskpsa-2025-003. The advisory is shared for download at netskope.com. This vulnerability is traded as CVE-2025-5942 since 06/09/2025. The exploitability is told to be easy. The attack needs to be approached locally. There are known technical details, but no exploit is available.

Upgrading to version 126.0.9 or 129.0.0 eliminates this vulnerability.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

Netskope

Name

Client

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.3

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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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: Partially
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Client 126.0.9/129.0.0

Timelineinfo

06/09/2025 CVE reserved
08/14/2025 +66 days Advisory disclosed
08/14/2025 +0 days VulDB entry created
08/14/2025 +0 days VulDB entry last update

Sourcesinfo

Advisory: nskpsa-2025-003
Researcher: Thomas Brice
Status: Confirmed

CVE: CVE-2025-5942 (🔒)
GCVE (CVE): GCVE-0-2025-5942
GCVE (VulDB): GCVE-100-320076

Entryinfo

Created: 08/14/2025 07:39
Updated: 08/14/2025 15:11
Changes: 08/14/2025 07:39 (70), 08/14/2025 15:11 (1)
Complete: 🔍
Cache ID: 216::103