CVE-2021-21726

Severity: low (CVSS 2.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-03-12 · updated 2026-06-17
Weakness: CWE-20

Description

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

References

http://support.zte.com.cn/support/news/LoopholeInfoDetail.aspx?newsId=1014664
http://support.zte.com.cn/support/news/LoopholeInfoDetail.aspx?newsId=1014664

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