# CVE-2026-4621

## Summary

- **CVE ID:** CVE-2026-4621
- **Severity:** MEDIUM
- **CVSS Score:** 6.3 (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)
- **CWE:** CWE-912
- **Published:** Mar 27, 2026
- **Last Modified:** Apr 10, 2026

## Description

Hidden Functionality vulnerability in NEC Platforms, Ltd. Aterm Series allows a attacker to enable telnet via network.

## Affected Products

- 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)

## References

- [CNA](https://jpn.nec.com/security-info/secinfo/nv26-001_en.html)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.16%
- **EPSS Percentile:** 5.2

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._