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Vulnerability record · CVE-2026-4621 · published 27 March 2026

CVE-2026-4621: Nec aterm wg1200hp4 firmware vulnerability

Nec · Aterm Wg1200hp4 Firmware

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

6.3 CVSS 4.0 Medium EPSS 0.25% · top 85.3% CWE-912 · CWE-912
6.3CVSS 4.0 base score
0.25%EPSS exploitation probability, 30 days
NoNot in CISA KEV
21Affected product versions listed by NVD
1References
17 Jun 2026Last modified by NVD

Description

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

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

21 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://jpn.nec.com/security-info/secinfo/nv26-001_en.html Vendor Advisory

Track CVE-2026-4621 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2024-28007Nec aterm wg1800hp4 firmware improper authentication vulnerabilityImproper authentication vulnerability in NEC Corporation Aterm WG1800HP4, WG1200HS3, WG1900HP2, WG1200HP3, WG1800HP3, WG1200HS2, WG1900HP, WG1200HP2,…EPSS 0.65%9.8CVE-2024-28008Nec aterm wg1800hp4 firmware vulnerabilityActive Debug Code in NEC Corporation Aterm WG1800HP4, WG1200HS3, WG1900HP2, WG1200HP3, WG1800HP3, WG1200HS2, WG1900HP, WG1200HP2, W1200EX(-MS), WG120…EPSS 0.62%9.8CVE-2024-28009Nec aterm wg1800hp4 firmware improper authentication vulnerabilityImproper authentication vulnerability in NEC Corporation Aterm WG1800HP4, WG1200HS3, WG1900HP2, WG1200HP3, WG1800HP3, WG1200HS2, WG1900HP, WG1200HP2,…EPSS 0.65%9.8CVE-2024-28010Nec aterm wg1800hp4 firmware hard-coded password vulnerabilityUse of Hard-coded Password in NEC Corporation Aterm WG1800HP4, WG1200HS3, WG1900HP2, WG1200HP3, WG1800HP3, WG1200HS2, WG1900HP, WG1200HP2, W1200EX(-M…EPSS 0.58%9.8CVE-2024-28011Nec aterm wg1800hp4 firmware vulnerabilityHidden Functionality vulnerability in NEC Corporation Aterm WG1800HP4, WG1200HS3, WG1900HP2, WG1200HP3, WG1800HP3, WG1200HS2, WG1900HP, WG1200HP2, W1…EPSS 0.62%9.8CVE-2024-28012Nec aterm wg1800hp4 firmware improper authentication vulnerabilityImproper authentication vulnerability in NEC Corporation Aterm WG1800HP4, WG1200HS3, WG1900HP2, WG1200HP3, WG1800HP3, WG1200HS2, WG1900HP, WG1200HP2,…EPSS 0.74%9.8CVE-2024-28014Nec aterm wg1800hp4 firmware stack-based buffer overflow vulnerabilityStack-based Buffer Overflow vulnerability in NEC Corporation Aterm WG1800HP4, WG1200HS3, WG1900HP2, WG1200HP3, WG1800HP3, WG1200HS2, WG1900HP, WG1200…EPSS 0.69%9.8CVE-2024-28015Nec aterm wg1800hp4 firmware os command injection vulnerabilityImproper Neutralization of Special Elements used in an OS Command vulnerability in NEC Corporation Aterm WG1800HP4, WG1200HS3, WG1900HP2, WG1200HP3, …EPSS 0.67%

Source: NIST National Vulnerability Database (record CVE-2026-4621), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.