CVE-2021-21749: ZTE MF971R Firmware

Critical severity, CVSS 9.8. EPSS: 1.6% chance of exploitation in the next 30 days.

ZTE MF971R product has two stack-based buffer overflow vulnerabilities. An attacker could exploit the vulnerabilities to execute arbitrary code.

Affected products

• ZTE MF971R Firmware: version v1.0.0b05 only; version 1v1.0.0b06 only; version 2v1.0.0b03 only; version s2v1.0.0b03 only; version sv1.0.0b05 only

Published 2021-10-20. Last modified 2026-06-17.