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CVE-2026-4621

Quick assessment

Affected
NEC Platforms, Ltd. Aterm W1200EX(-MS)
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.

NEC Platforms Aterm Series是日本NEC公司的一系列无线路由与网络设备产品。 NEC Platforms Aterm Series存在安全漏洞，该漏洞源于隐藏功能，可能导致攻击者启用telnet。

AI Predicted 6.5 Difficulty: Easy EPSS 0.25% · P15

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-4621

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
Hidden Functionality vulnerability in NEC Platforms, Ltd. Aterm Series allows a attacker to enable telnet via network.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
隐藏功能
Source: CVE Program / CVE List V5
Vulnerability Title
NEC Platforms Aterm Series 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
NEC Platforms Aterm Series是日本NEC公司的一系列无线路由与网络设备产品。 NEC Platforms Aterm Series存在安全漏洞，该漏洞源于隐藏功能，可能导致攻击者启用telnet。
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
NEC Platforms, Ltd. Aterm W1200EX(-MS) All versions -
NEC Platforms, Ltd. Aterm WG1200HP2 All versions -
NEC Platforms, Ltd. Aterm WG1900HP All versions -
NEC Platforms, Ltd. Aterm WG1200HS2 All versions -
NEC Platforms, Ltd. Aterm WG1800HP3 All versions -
NEC Platforms, Ltd. Aterm WG1200HP3 All versions -
NEC Platforms, Ltd. Aterm WG1900HP2 All versions -
NEC Platforms, Ltd. Aterm WG1200HS3 All versions -
NEC Platforms, Ltd. Aterm WG1800HP4 All versions -
NEC Platforms, Ltd. Aterm WG1200HP4 All versions -
NEC Platforms, Ltd. Aterm WG1200HS4 All versions -
NEC Platforms, Ltd. Aterm WX1500HP Before Ver. 1.4.2 -
NEC Platforms, Ltd. Aterm WG2600HS Before Ver. 1.7.2 -
NEC Platforms, Ltd. Aterm WF1200CR Before Ver. 1.6.0 -
NEC Platforms, Ltd. Aterm WG1200CR Before Ver. 1.5.0 -
NEC Platforms, Ltd. Aterm WG2600HP4 Before Ver. 1.4.2 -
NEC Platforms, Ltd. Aterm WG2600HM4 Before Ver. 1.4.2 -
NEC Platforms, Ltd. Aterm WG2600HS2 Before Ver. 1.3.2 -
NEC Platforms, Ltd. Aterm WX3000HP Before Ver. 2.5.0 -
NEC Platforms, Ltd. Aterm WX3000HP2 Before Ver. 1.3.2 -
NEC Platforms, Ltd. Aterm WX3600HP Before Ver. 1.4.2 -
NEC Platforms, Ltd. Aterm GX1200HP All versions -
NEC Platforms, Ltd. Aterm GX1200HS4 All versions -
NEC Platforms, Ltd. Aterm WG1200DM4 All versions -
NEC Platforms, Ltd. Aterm GB1200PE Before Ver. 1.3.1 -

II. Public POCs for CVE-2026-4621

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III. Intelligence Information for CVE-2026-4621

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Same Patch Batch · NEC Platforms, Ltd. · 2026-03-27 · 5 CVEs total

CVE-2026-4309 NEC Platforms Aterm Series 安全漏洞
CVE-2026-4619 NEC Platforms Aterm Series 安全漏洞
CVE-2026-4622 NEC Platforms Aterm Series 安全漏洞
CVE-2026-4620 NEC Platforms Aterm Series 安全漏洞

IV. Related Vulnerabilities

Same product: Aterm W1200EX(-MS)
Same vendor: NEC Platforms, Ltd.
Same weakness: CWE-912

V. Comments for CVE-2026-4621

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