NVIDIA HGX/DGX B300 CX8 MCU hardware internal or debug modes allow override of locks

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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4.6$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in NVIDIA HGX and DGX B300. Impacted is an unknown function of the component CX8 MCU. This manipulation causes hardware internal or debug modes allow override of locks. This vulnerability is registered as CVE-2025-33242. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability has been found in NVIDIA HGX and DGX B300 (affected version unknown) and classified as problematic. Affected by this vulnerability is an unknown functionality of the component CX8 MCU. The manipulation with an unknown input leads to a hardware internal or debug modes allow override of locks vulnerability. The CWE definition for the vulnerability is CWE-1234. System configuration protection may be bypassed during debug mode. As an impact it is known to affect integrity, and availability. The summary by CVE is:

NVIDIA B300 MCU contains a vulnerability in the CX8 MCU that could allow a malicious actor to modify unsupported registries, causing a bad state. A successful exploit of this vulnerability might lead to denial of service and data tampering.

This vulnerability is known as CVE-2025-33242 since 04/15/2025. The exploitation appears to be difficult. The attack can be launched remotely. The exploitation requires an enhanced level of successful authentication. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 05/04/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at CERT Bund (WID-SEC-2026-1342). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Affected

  • Dell PowerEdge

Productinfo

Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.6
VulDB Meta Temp Score: 4.6

VulDB Base Score: 3.3
VulDB Temp Score: 3.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 5.9
CNA Vector (nvidia): 🔒

CVSSv2info

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

Exploitinginfo

Class: Hardware internal or debug modes allow override of locks
CWE: CWE-1234 / CWE-489
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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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

04/15/2025 CVE reserved
03/25/2026 +344 days Advisory disclosed
03/25/2026 +0 days VulDB entry created
05/04/2026 +40 days VulDB entry last update

Sourcesinfo

Vendor: nvidia.com

Status: Not defined

CVE: CVE-2025-33242 (🔒)
GCVE (CVE): GCVE-0-2025-33242
GCVE (VulDB): GCVE-100-352885
CERT Bund: WID-SEC-2026-1342 - Dell PowerEdge: Schwachstelle ermöglicht Manipulation von Daten und Denial of Service

Entryinfo

Created: 03/25/2026 07:21
Updated: 05/04/2026 12:54
Changes: 03/25/2026 07:21 (59), 03/29/2026 11:35 (1), 05/04/2026 12:54 (7)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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