CVE-2026-4621
MEDIUMCVSS 6.3/10EPSS 0.16%
Last modified
CVE-2026-4621 is a medium-severity vulnerability rated 6.3/10 on the CVSS scale. Hidden Functionality vulnerability in NEC Platforms, Ltd. Aterm Series allows a attacker to enable telnet via network.. EPSS estimates a 0.16% chance of exploitation in the next 30 days.
Description
Hidden Functionality vulnerability in NEC Platforms, Ltd. Aterm Series allows a attacker to enable telnet via network.
Metrics
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
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:X/V:X/RE:X/U:X
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Nec | Aterm Wg1200hp4 Firmware | All versions |
| Nec | Aterm Wg2600hs Firmware | < 1.7.2 |
| Nec | Aterm Wf1200cr Firmware | < 1.6.0 |
| Nec | Aterm Wg1200cr Firmware | < 1.5.0 |
| Nec | Aterm Wg2600hp4 Firmware | < 1.4.2 |
| Nec | Aterm Wg2600hm4 Firmware | < 1.4.2 |
| Nec | Aterm Wg2600hs2 Firmware | < 1.3.2 |
| Nec | Aterm Wx3000hp Firmware | < 2.5.0 |
| Nec | Aterm Wx3600hp Firmware | <= 1.5.3 |
| Nec | Aterm W1200ex-Ms Firmware | All versions |
| Nec | Aterm Wg1200hp2 Firmware | All versions |
| Nec | Aterm Wg1900hp Firmware | All versions |
| Nec | Aterm Wg1200hs2 Firmware | All versions |
| Nec | Aterm Wg1800hp3 Firmware | All versions |
| Nec | Aterm Wg1200hp3 Firmware | All versions |
| Nec | Aterm Wg1900hp2 Firmware | All versions |
| Nec | Aterm Wg1200hs3 Firmware | All versions |
| Nec | Aterm Wg1800hp4 Firmware | All versions |
| Nec | Aterm Wg1200hs4 Firmware | All versions |
| Nec | Aterm Wx1500hp Firmware | < 1.4.2 |
| Nec | Aterm Wx3000hp2 Firmware | < 1.3.2 |
References
- https://jpn.nec.com/security-info/secinfo/nv26-001_en.htmlVendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-4621?
Hidden Functionality vulnerability in NEC Platforms, Ltd. Aterm Series allows a attacker to enable telnet via network.
How severe is CVE-2026-4621?
CVE-2026-4621 has a CVSS score of 6.3/10 (MEDIUM severity). The EPSS model estimates a 0.16% probability of exploitation in the next 30 days.
How do I fix CVE-2026-4621?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
Are you affected by CVE-2026-4621?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST