CVE-2021-21734: ZTE ZXA10 f809 Firmware

Medium severity, CVSS 6.5. EPSS: 0.5% chance of exploitation in the next 30 days.

Some PON MDU devices of ZTE stored sensitive information in plaintext, and users with login authority can obtain it by inputing command. This affects: ZTE PON MDU device ZXA10 F821 V1.7.0P3T22, ZXA10 F822 V1.4.3T6, ZXA10 F819 V1.2.1T5, ZXA10 F832 V1.1.1T7, ZXA10 F839 V1.1.0T8, ZXA10 F809 V3.2.1T1, ZXA10 F822P V1.1.1T7, ZXA10 F832 V2.00.00.01

Affected products

• ZTE ZXA10 f809 Firmware: version 3.2.1t1 only
• ZTE ZXA10 f819 Firmware: version 1.2.1t5 only
• ZTE ZXA10 f821 Firmware: version 1.7.0p3t22 only
• ZTE ZXA10 f822 Firmware: version 1.4.3t6 only
• ZTE ZXA10 f822p Firmware: version 1.1.1t7 only
• ZTE ZXA10 f832 Firmware: version 1.1.1t7 only
• ZTE ZXA10 f832v2 Firmware: version 2.00.00.01 only
• ZTE ZXA10 f839 Firmware: version 1.1.0t8 only

Published 2021-05-28. Last modified 2026-06-17.