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CVE-2026-10831— Improper Authorization of Break Signal Commands in Devices

Quick assessment

Affected
Moxa NPort 6000 Series
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Moxa NPort 6000 Series是中国Moxa公司的一款工业路由器设备。 Moxa NPort 6000 Series存在授权问题漏洞，该漏洞源于命令端口访问控制不当，可能导致远程攻击者通过网络访问发送特制请求，干扰活跃用户会话的串行通信。

AI Predicted 5.3 Difficulty: Easy EPSS 0.29% · P20

Affected Version Matrix 2

VendorProduct Version RangeStatus
Moxa CN2600 Series 1.0≤ 4.6 affected
Moxa NPort 6000 Series 1.0≤ 2.3 affected
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I. Basic Information for CVE-2026-10831

Vulnerability Information
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Vulnerability Title
Improper Authorization of Break Signal Commands in Devices
Source: CVE Program / CVE List V5
Vulnerability Description
A denial-of-service vulnerability exists in NPort devices because of improper access control on the command port. The command interface does not properly validate whether a sender is associated with a valid data port session before accepting break signal commands. A remote attacker with network access can send crafted requests to disrupt serial communication for an active user session.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:L
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
Moxa NPort 6000 Series 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Moxa NPort 6000 Series是中国Moxa公司的一款工业路由器设备。 Moxa NPort 6000 Series存在授权问题漏洞，该漏洞源于命令端口访问控制不当，可能导致远程攻击者通过网络访问发送特制请求，干扰活跃用户会话的串行通信。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Moxa NPort 6000 Series 1.0 ~ 2.3 -
Moxa CN2600 Series 1.0 ~ 4.6 -

II. Public POCs for CVE-2026-10831

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III. Intelligence Information for CVE-2026-10831

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Vendor Advisories for CVE-2026-10831 (1)

Same Patch Batch · Moxa · 2026-06-16 · 4 CVEs total

CVE-2026-10825 Improper JSON Input Validation in WebSocket API Leads to Denial of Service
CVE-2026-10828 Moxa NPort W2150A-W4/W2250A-W4 Series 格式化字符串错误漏洞
CVE-2026-10829 Moxa NPort W2150A-W4/W2250A-W4 Series 缓冲区错误漏洞

IV. Related Vulnerabilities

Same product: NPort 6000 Series
Same vendor: Moxa
Same weakness: CWE-862

V. Comments for CVE-2026-10831

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