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Medium severity · published Mar 27, 2026
CVE-2026-4621
Hidden Functionality vulnerability in NEC Platforms, Ltd
5.6
CVSS
0.2%
EPSS
No
On KEV
Description
Hidden Functionality vulnerability in NEC Platforms, Ltd. Aterm Series allows a attacker to enable telnet via network.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 5% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AG
Aterm GB1200PE · NEC Platforms, Ltd.
Before Ver. 1.3.1 · source: vendor
AG
Aterm GX1200HP · NEC Platforms, Ltd.
All versions · source: vendor
AG
Aterm GX1200HS4 · NEC Platforms, Ltd.
All versions · source: vendor
AW
Aterm W1200EX(-MS) · NEC Platforms, Ltd.
All versions · source: vendor
AW
Aterm WF1200CR · NEC Platforms, Ltd.
Before Ver. 1.6.0 · source: vendor
AW
Aterm WG1200CR · NEC Platforms, Ltd.
Before Ver. 1.5.0 · source: vendor
AW
Aterm WG1200DM4 · NEC Platforms, Ltd.
All versions · source: vendor
AW
Aterm WG1200HP2 · NEC Platforms, Ltd.
All versions · source: vendor
AW
Aterm WG1200HP3 · NEC Platforms, Ltd.
All versions · source: vendor
AW
Aterm WG1200HP4 · NEC Platforms, Ltd.
All versions · source: vendor
AW
Aterm WG1200HS2 · NEC Platforms, Ltd.
All versions · source: vendor
AW
Aterm WG1200HS3 · NEC Platforms, Ltd.
All versions · source: vendor
Affected product
AG
Aterm GB1200PE
NEC Platforms, Ltd.
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-4621
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-4621
Vendor Advisory
https://jpn.nec.com/security-info/secinfo/nv26-001_en.html
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