CVE-2021-21726: ZTE Zxone 19700 Firmware

Low severity, CVSS 2.3. EPSS: 0.4% chance of exploitation in the next 30 days.

Some ZTE products have an input verification vulnerability in the diagnostic function interface. Due to insufficient verification of some parameters input by users, an attacker with high privileges can cause process exception by repeatedly inputting illegal parameters. This affects:<ZXONE 9700 , ZXONE 8700, ZXONE 19700><V1.40.021.021CP049, V1.0P02B219_@NCPM-RELEASE_2.40R1-20200914.set>

Affected products

• ZTE Zxone 19700 Firmware: version 1.0p02b219_@ncpm-release_2.40r1-20200914.set only
• ZTE Zxone 8700 Firmware: version 1.40.021.021cp049 only
• ZTE Zxone 9700 Firmware: version 1.40.021.021cp049 only

Published 2021-03-12. Last modified 2026-06-17.