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CVE-2026-4309

Missing Authorization Enables Unauthorized Retrieval and Modification on NEC Aterm Routers

Missing Authorization vulnerability in NEC Platforms, Ltd. Aterm Series allows a attacker to get a specific device information and change the settings via network.

CVSS 4.0 · 6.3 Medium EPSS < 1% KEV · Not listed
Vendors
Nec
CVE-2021-20712

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.

CVSS 3.1 · 5.3 Medium EPSS < 1% KEV · Not listed
Vendors
Nec
CVE-2021-20709

Improper validation of integrity check value vulnerability in NEC Aterm WF1200CR firmware Ver1.3.2 and earlier, Aterm WG1200CR firmware Ver1.3.3 and earlier, and Aterm WG2600HS firmware Ver1.5.1 and earlier allows an attacker with an administrative privilege to execute arbitrary OS commands by sending a specially crafted request to a specific URL.

CVSS 3.1 · 7.2 High EPSS < 1% KEV · Not listed
Vendors
Nec
CVE-2021-20708

NEC Aterm devices (Aterm WF1200CR firmware Ver1.3.2 and earlier, Aterm WG1200CR firmware Ver1.3.3 and earlier, and Aterm WG2600HS firmware Ver1.5.1 and earlier) allow authenticated attackers to execute arbitrary OS commands by sending a specially crafted request to a specific URL.

CVSS 3.1 · 7.2 High EPSS 1.2% KEV · Not listed
Vendors
Nec
CVE-2020-5534

Aterm WG2600HS firmware Ver1.3.2 and earlier allows an authenticated attacker on the same network segment to execute arbitrary OS commands with root privileges via unspecified vectors.

CVSS 3.1 · 8.0 High EPSS < 1% KEV · Not listed
Vendors
Nec
CVE-2020-5533

Cross-site scripting vulnerability in Aterm WG2600HS firmware Ver1.3.2 and earlier allows remote attackers to inject arbitrary web script or HTML via unspecified vectors.

CVSS 3.1 · 6.1 Medium EPSS < 1% KEV · Not listed
Vendors
Nec
CVE-2020-5525

Aterm series (Aterm WF1200C firmware Ver1.2.1 and earlier, Aterm WG1200CR firmware Ver1.2.1 and earlier, Aterm WG2600HS firmware Ver1.3.2 and earlier) allows an authenticated attacker on the same network segment to execute arbitrary OS commands with root privileges via management screen.

CVSS 3.1 · 8.0 High EPSS < 1% KEV · Not listed
Vendors
Nec
CVE-2020-5524

Aterm series (Aterm WF1200C firmware Ver1.2.1 and earlier, Aterm WG1200CR firmware Ver1.2.1 and earlier, Aterm WG2600HS firmware Ver1.3.2 and earlier) allows an attacker on the same network segment to execute arbitrary OS commands with root privileges via UPnP function.

CVSS 3.1 · 8.8 High EPSS 1.0% KEV · Not listed
Vendors
Nec