CVE-2026-4621 Security feature bypass in Aterm GB1200PE
Attackers can enable hidden telnet access on NEC Aterm routers, potentially leading to unauthorized remote control and code execution.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-4621?
CVE-2026-4621 is a medium-severity vulnerability in NEC Platforms, Ltd. Aterm GB1200PE, published on 27 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Hidden Functionality vulnerability in NEC Platforms, Ltd. Aterm Series allows a attacker to enable telnet via network.
Weakness: CWE-912
Which versions are affected by CVE-2026-4621?
It affects 21 products.
Products include Nec Aterm W1200ex-Ms Firmware, Nec Aterm Wf1200cr Firmware, Nec Aterm Wg1200cr Firmware, Nec Aterm Wg1200hp2 Firmware, Nec Aterm Wg1200hp3 Firmware, Nec Aterm Wg1200hp4 Firmware and 15 more.
How do I fix CVE-2026-4621?
No fix has been published for CVE-2026-4621 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-4621 being exploited?
There is no known exploitation of CVE-2026-4621 in the wild and no public exploit code.
Other vulnerabilities in NEC Platforms, Ltd. Aterm GB1200PE
Sources
Also known as GHSA-v782-gww8-28q2.