Improper access control vulnerability in NEC Aterm WG2600HS firmware Ver1.5.1 and…
Priority LOW 25Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- Low · None · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
Improper access control vulnerability in NEC Aterm WG2600HS firmware Ver1.5.1 and earlier, and Aterm WX3000HP firmware Ver1.1.2 and earlier allows a device connected to the LAN side to be accessed from the WAN side due to the defect in the IPv6 firewall function.
Why it matters now
EPSS 0.00801 56th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| NEC Corporation | NEC Aterm devices | Aterm WG2600HS firmware Ver1.5.1 and earlier, and Aterm WX3000HP firmware Ver1.1.2 and earlier | — | No fix listed | CNA |
- NEC Aterm devices VendorNEC Corporation Affected Aterm WG2600HS firmware Ver1.5.1 and earlier, and Aterm WX3000HP firmware Ver1.1.2 and earlier Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:nec:aterm_wg2600hs_firmware:*:*:*:*:*:*:*:* | up to 1.5.1 | Vulnerable | NEC Corporation |
| cpe:2.3:h:nec:aterm_wg2600hs:-:*:*:*:*:*:*:* | not specified by NVD | Running on | NEC Corporation |
| cpe:2.3:o:nec:aterm_wx3000hp_firmware:*:*:*:*:*:*:*:* | up to 1.1.2 | Vulnerable | NEC Corporation |
| cpe:2.3:h:nec:aterm_wx3000hp:-:*:*:*:*:*:*:* | not specified by NVD | Running on | NEC Corporation |
- cpe:2.3:o:nec:aterm_wg2600hs_firmware:*:*:*:*:*:*:*:* Versions up to 1.5.1 Vulnerable ·NEC Corporation
- cpe:2.3:h:nec:aterm_wg2600hs:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NEC Corporation
- cpe:2.3:o:nec:aterm_wx3000hp_firmware:*:*:*:*:*:*:*:* Versions up to 1.1.2 Vulnerable ·NEC Corporation
- cpe:2.3:h:nec:aterm_wx3000hp:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NEC Corporation
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2021-20712
- 2026-10-03 Alias added: GHSA-c7vp-4m6m-jg9v
References
More NEC Corporation Aterm Wg2600hs Firmware vulnerabilities
- TI-2021-03937 OS command injection in NEC Corporation Aterm WG2600HS CVSS 3.1CRITICAL 9.8
- TI-2020-04494 OS command injection in NEC Corporation Aterm series CVSS 3.1HIGH 8.8
- TI-2020-04504 OS command injection in NEC Corporation Aterm WG2600HS CVSS 3.1HIGH 8.0
- TI-2020-04495 OS command injection in NEC Corporation Aterm series CVSS 3.1HIGH 8.0
- TI-2026-04024 OS command injection in NEC Platforms, Ltd. Aterm WG2600HS CVSS 4.0HIGH 7.1
- TI-2021-03934 OS command injection in NEC Aterm devices CVSS 3.1HIGH 7.2
Sources
- CVE-2021-20712 · CVE Program
- CVE-2021-20712 · NVD
- FIRST EPSS
- GHSA-c7vp-4m6m-jg9v · GitHub Advisory Database · CC BY 4.0
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