CVE-2021-20709: Nec Aterm WF1200CR Firmware

High severity, CVSS 7.2. EPSS: 0.7% chance of exploitation in the next 30 days.

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.

Affected products

• Nec Aterm WF1200CR Firmware: up to and including 1.3.2
• Nec Aterm WG1200CR Firmware: up to and including 1.3.3
• Nec Aterm WG2600HS Firmware: up to and including 1.5.1

Published 2021-04-26. Last modified 2026-06-17.