Nuvoton NPCT7xx Elliptic Curve improper protection of physical side channels

CVSS Meta Temp Score
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CTI Interest Score
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2.7$0-$5k0.00

Summaryinfo

A vulnerability categorized as problematic has been discovered in Nuvoton NPCT7xx. The affected element is an unknown function of the component Elliptic Curve Handler. Executing a manipulation can lead to improper protection of physical side channels. This vulnerability is tracked as CVE-2026-6923. The physical device can be targeted for the attack. No exploit exists.

Detailsinfo

A vulnerability classified as problematic was found in Nuvoton NPCT7xx (affected version unknown). This vulnerability affects an unknown functionality of the component Elliptic Curve Handler. The manipulation with an unknown input leads to a improper protection of physical side channels vulnerability. The CWE definition for the vulnerability is CWE-1300. The device does not contain sufficient protection mechanisms to prevent physical side channels from exposing sensitive information due to patterns in physically observable phenomena such as variations in power consumption, electromagnetic emissions (EME), or acoustic emissions. As an impact it is known to affect confidentiality. CVE summarizes:

A side-channel attack, which requires a physical presence to the TPM, can lead to extraction of an Elliptic Curve Diffie-Hellman (ECDH) key.

The weakness was disclosed by Robin Muller and Roman Korkikian. The advisory is shared for download at gov.il. This vulnerability was named CVE-2026-6923 since 04/23/2026. The exploitation appears to be difficult. The attack needs to be approached locally. Additional levels of successful authentication are required for exploitation. There are neither technical details nor an exploit publicly available.

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

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Productinfo

Vendor

Name

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 2.7
VulDB Meta Temp Score: 2.7

VulDB Base Score: 1.6
VulDB Temp Score: 1.6
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 3.8
CNA Vector (INCD): 🔒

CVSSv2info

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

Exploitinginfo

Class: Improper protection of physical side channels
CWE: CWE-1300
CAPEC: 🔒
ATT&CK: 🔒

Physical: Yes
Local: Yes
Remote: No

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

04/23/2026 CVE reserved
05/14/2026 +21 days Advisory disclosed
05/14/2026 +0 days VulDB entry created
05/14/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: gov.il
Researcher: Robin Muller, Roman Korkikian
Status: Not defined

CVE: CVE-2026-6923 (🔒)
GCVE (CVE): GCVE-0-2026-6923
GCVE (VulDB): GCVE-100-363952

Entryinfo

Created: 05/14/2026 20:08
Changes: 05/14/2026 20:08 (61)
Complete: 🔍
Cache ID: 216::103

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