Moxa NPort 6100-G2/NPort 6200-G2 up to 1.0.0 API null termination

CVSS Meta Temp Score
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CTI Interest Score
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7.3$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in Moxa NPort 6100-G2 and NPort 6200-G2 up to 1.0.0. Impacted is an unknown function of the component API. Performing a manipulation results in null termination. This vulnerability is known as CVE-2025-2026. Remote exploitation of the attack is possible. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Moxa NPort 6100-G2 and NPort 6200-G2 up to 1.0.0. It has been classified as critical. This affects some unknown processing of the component API. The manipulation with an unknown input leads to a null termination vulnerability. CWE is classifying the issue as CWE-170. The product does not terminate or incorrectly terminates a string or array with a null character or equivalent terminator. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

The NPort 6100-G2/6200-G2 Series is affected by a high-severity vulnerability (CVE-2025-2026) that allows remote attackers to execute a null byte injection through the device’s web API. This may lead to an unexpected device reboot and result in a denial-of-service (DoS) condition. An authenticated remote attacker with web read-only privileges can exploit the vulnerable API to inject malicious input. Successful exploitation may cause the device to reboot, disrupting normal operations and causing a temporary denial of service.

The weakness was published by Cory Yh Tseng. It is possible to read the advisory at moxa.com. This vulnerability is uniquely identified as CVE-2025-2026 since 03/06/2025. The exploitability is told to be easy. It is possible to initiate the attack remotely. The technical details are unknown and an exploit is not publicly available.

Upgrading to version 1.1.0 eliminates this vulnerability.

The vulnerability is also documented in the databases at EUVD (EUVD-2025-205901) and CERT Bund (WID-SEC-2026-0002). Be aware that VulDB is the high quality source for vulnerability data.

Affected

  • Moxa NPort

Productinfo

Type

Vendor

Name

Version

License

Website

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: 7.6
VulDB Meta Temp Score: 7.3

VulDB Base Score: 7.6
VulDB Temp Score: 7.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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

Exploitinginfo

Class: Null termination
CWE: CWE-170 / 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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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: NPort 6100-G2/NPort 6200-G2 1.1.0

Timelineinfo

03/06/2025 CVE reserved
12/31/2025 +300 days Advisory disclosed
12/31/2025 +0 days VulDB entry created
01/02/2026 +2 days VulDB entry last update

Sourcesinfo

Vendor: moxa.com

Advisory: moxa.com
Researcher: Cory Yh Tseng
Status: Confirmed

CVE: CVE-2025-2026 (🔒)
GCVE (CVE): GCVE-0-2025-2026
GCVE (VulDB): GCVE-100-339135
EUVD: 🔒
CERT Bund: WID-SEC-2026-0002 - Moxa NPort: Mehrere Schwachstellen

Entryinfo

Created: 12/31/2025 09:49
Updated: 01/02/2026 11:47
Changes: 12/31/2025 09:49 (68), 12/31/2025 14:40 (1), 01/02/2026 11:47 (7)
Complete: 🔍
Cache ID: 216::103

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

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