CVE-2026-4621: Medium severity NEC Platforms Aterm Series vulnerability
Published Mar 27, 2026
·Updated
Hidden Functionality vulnerability in NEC Platforms, Ltd. Aterm Series allows a attacker to enable telnet via network.
Affected Software
43 affected components
NEC Platforms Aterm Series
All of the following
NEC Aterm Wg1200hp4 Firmware
NEC Aterm Wg1200hp4
All of the following
NEC Aterm WG2600HS firmware<1.7.2
NEC Aterm WG2600HS
All of the following
NEC Aterm WF1200CR firmware<1.6.0
NEC Aterm WF1200CR
All of the following
NEC Aterm WG1200CR firmware<1.5.0
NEC Aterm WG1200CR
All of the following
NEC Aterm Wg2600hp4 Firmware<1.4.2
NEC Aterm WG2600HP4
All of the following
NEC Aterm Wg2600hm4 Firmware<1.4.2
NEC Aterm WG2600HM4
All of the following
NEC Aterm Wg2600hs2 Firmware<1.3.2
NEC Aterm WG2600HS2
All of the following
NEC Aterm WX3000HP firmware<2.5.0
NEC Aterm WX3000HP
All of the following
NEC Aterm Wx3600hp Firmware<=1.5.3
NEC Aterm WX3600HP
All of the following
NEC Aterm W1200EX-MS firmware
NEC Aterm W1200EX-MS
All of the following
NEC Aterm WG1200HP2 firmware
NEC Aterm WG1200HP2
All of the following
NEC Aterm WG1900HP firmware
NEC Aterm WG1900HP
All of the following
NEC Aterm WG1200HS2 firmware
NEC Aterm WG1200HS2
All of the following
NEC Aterm WG1800HP3 firmware
NEC Aterm WG1800HP3
All of the following
NEC Aterm WG1200HP3 firmware
NEC Aterm WG1200HP3
All of the following
NEC Aterm WG1900HP2 firmware
NEC Aterm WG1900HP2
All of the following
NEC Aterm Wg1200hs3 Firmware
NEC Aterm Wg1200hs3
All of the following
NEC Aterm WG1800HP4 firmware
NEC Aterm WG1800HP4
All of the following
NEC Aterm Wg1200hs4 Firmware
NEC Aterm Wg1200hs4
All of the following
NEC Aterm Wx1500hp Firmware<1.4.2
NEC Aterm WX1500HP
All of the following
NEC Aterm Wx3000hp2 Firmware<1.3.2
NEC Aterm Wx3000hp2
Event History
Mar 27, 2026
CVE Published
via MITRE·11:52 AM
Data Sourced
via MITRE·11:52 AM
DescriptionWeakness
Data Sourced
via NVD·12:16 PM
DescriptionSeverityWeaknessAffected Software
Frequently Asked Questions
1
What is the severity of CVE-2026-4621?
CVE-2026-4621 is classified as a medium severity vulnerability.
2
How does CVE-2026-4621 affect NEC Platforms Aterm Series?
CVE-2026-4621 allows an attacker to enable telnet functionality remotely, potentially compromising the device.
3
How can I mitigate the risks associated with CVE-2026-4621?
To mitigate CVE-2026-4621, disable telnet access and update to the latest firmware provided by NEC Platforms.
4
Is there an official patch available for CVE-2026-4621?
Yes, NEC Platforms has released a patch addressing CVE-2026-4621 which can be found on their official security information page.
5
What should I do if my NEC Platforms Aterm Series device is vulnerable to CVE-2026-4621?
If your device is vulnerable to CVE-2026-4621, apply the recommended security updates and review device configuration settings.