CVE-2026-4621: CWE-912: Hidden Functionality in NEC Platforms, Ltd. Aterm W1200EX(-MS)
Hidden Functionality vulnerability in NEC Platforms, Ltd. Aterm Series allows a attacker to enable telnet via network.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-4621) in NEC Platforms, Ltd. Aterm W1200EX(-MS) devices is classified under CWE-912 (Hidden Functionality). It allows an attacker to enable Telnet remotely via the network, which is typically disabled by default. The CVSS 4.0 base score is 6.3 (medium severity), reflecting network attack vector with high attack complexity and no privileges or user interaction required. The vulnerability affects all versions of the product. No patch or vendor advisory is currently available.
Potential Impact
If exploited, this vulnerability could allow an attacker to enable Telnet access on the affected device remotely. Telnet is an insecure protocol that could expose the device to unauthorized access or further compromise. However, the attack complexity is high, and no known exploits are reported in the wild. The overall impact is considered medium severity.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should monitor NEC Platforms' advisories for updates. As no vendor advisory or patch links are provided, no specific mitigation steps can be recommended at this time.
CVE-2026-4621: CWE-912: Hidden Functionality in NEC Platforms, Ltd. Aterm W1200EX(-MS)
Description
Hidden Functionality vulnerability in NEC Platforms, Ltd. Aterm Series allows a attacker to enable telnet via network.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-4621) in NEC Platforms, Ltd. Aterm W1200EX(-MS) devices is classified under CWE-912 (Hidden Functionality). It allows an attacker to enable Telnet remotely via the network, which is typically disabled by default. The CVSS 4.0 base score is 6.3 (medium severity), reflecting network attack vector with high attack complexity and no privileges or user interaction required. The vulnerability affects all versions of the product. No patch or vendor advisory is currently available.
Potential Impact
If exploited, this vulnerability could allow an attacker to enable Telnet access on the affected device remotely. Telnet is an insecure protocol that could expose the device to unauthorized access or further compromise. However, the attack complexity is high, and no known exploits are reported in the wild. The overall impact is considered medium severity.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should monitor NEC Platforms' advisories for updates. As no vendor advisory or patch links are provided, no specific mitigation steps can be recommended at this time.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- NEC
- Date Reserved
- 2026-03-23T06:04:48.670Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 69c674b53c064ed76fa619e1
Added to database: 3/27/2026, 12:14:45 PM
Last enriched: 4/11/2026, 5:35:04 AM
Last updated: 5/11/2026, 5:25:13 AM
Views: 82
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