🛡️ CVE-2026-4621 — aterm-w1200ex-ms-firmware
Description
Hidden Functionality vulnerability in NEC Platforms, Ltd. Aterm Series allows a attacker to enable telnet via network.
How this vulnerability can be exploited
This issue can be reached over the network, attack complexity is high, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality low, integrity low, availability low.
Affected software
CVE-2026-4621 is recorded against 21 packages.
- aterm-w1200ex-ms-firmware
- aterm-wf1200cr-firmware (fixed in 1.6.0)
- aterm-wg1200cr-firmware (fixed in 1.5.0)
- aterm-wg1200hp2-firmware
- aterm-wg1200hp3-firmware
- aterm-wg1200hp4-firmware
- aterm-wg1200hs2-firmware
- aterm-wg1200hs3-firmware
- aterm-wg1200hs4-firmware
- aterm-wg1800hp3-firmware
- aterm-wg1800hp4-firmware
- aterm-wg1900hp-firmware
- aterm-wg1900hp2-firmware
- aterm-wg2600hm4-firmware (fixed in 1.4.2)
- aterm-wg2600hp4-firmware (fixed in 1.4.2)
- aterm-wg2600hs-firmware (fixed in 1.7.2)
- aterm-wg2600hs2-firmware (fixed in 1.3.2)
- aterm-wx1500hp-firmware (fixed in 1.4.2)
- aterm-wx3000hp-firmware (fixed in 2.5.0)
- aterm-wx3000hp2-firmware (fixed in 1.3.2)
- aterm-wx3600hp-firmware (fixed in 1.5.3)
Timeline and source
Published on 27 March 2026 and last revised on 17 June 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.
References
Details
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
Affected Packages
| Software | From version | Fixed in |
|---|---|---|
| aterm-w1200ex-ms-firmware | — | — |
| aterm-wf1200cr-firmware | — | 1.6.0 |
| aterm-wg1200cr-firmware | — | 1.5.0 |
| aterm-wg1200hp2-firmware | — | — |
| aterm-wg1200hp3-firmware | — | — |
| aterm-wg1200hp4-firmware | — | — |
| aterm-wg1200hs2-firmware | — | — |
| aterm-wg1200hs3-firmware | — | — |
| aterm-wg1200hs4-firmware | — | — |
| aterm-wg1800hp3-firmware | — | — |
| aterm-wg1800hp4-firmware | — | — |
| aterm-wg1900hp-firmware | — | — |
| aterm-wg1900hp2-firmware | — | — |
| aterm-wg2600hm4-firmware | — | 1.4.2 |
| aterm-wg2600hp4-firmware | — | 1.4.2 |
| aterm-wg2600hs-firmware | — | 1.7.2 |
| aterm-wg2600hs2-firmware | — | 1.3.2 |
| aterm-wx1500hp-firmware | — | 1.4.2 |
| aterm-wx3000hp-firmware | — | 2.5.0 |
| aterm-wx3000hp2-firmware | — | 1.3.2 |
| aterm-wx3600hp-firmware | — | 1.5.3 |
References
Similar Threats
- Medium CVE-2026-4309
- Medium CVE-2024-28005
- Medium CVE-2024-28006
- Critical CVE-2024-28007
- Critical CVE-2024-28008
More CVE 2026 advisories
Browse all of CVE 2026 in the advisory index.
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