CVE-2021-27692

Command Injection in Tenda G1 and G3 routers with firmware versions v15.11.0.17(9502)_CN or v15.11.0.16(9024)_CN allows remote attackers to execute arbitrary OS commands via a crafted "action/umountUSBPartition" request. This occurs because the "formSetUSBPartitionUmount" function executes the "doSystemCmd" function with untrusted input.
OS Command Injection
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
9.8 CRITICAL
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Affected Products (NVD)
VendorProductVersion
tendacng1_firmware
15.11.0.16\(9024\)_cn
tendacng1_firmware
15.11.0.17\(9502\)_cn
tendacng3_firmware
15.11.0.16\(9024\)_cn
tendacng3_firmware
15.11.0.17\(9502\)_cn
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://hackmd.io/%40aZYpdinUS2SD-yhAeHwOkw/ry-t4QfMu
https://hackmd.io/%40aZYpdinUS2SD-yhAeHwOkw/ry-t4QfMu