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CVE-2021-27692

CRITICAL
9.8
CVSS Score
Published: April 15, 2021 at 11:14 PM UTC
Updated: June 17, 2026 at 03:45 AM UTC
4 products affected across 1 vendorG3 FirmwareG1 FirmwareG3

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Severity
CRITICAL9.8
Exploit prediction
EPSS 3%

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

G1 Firmware· Tendacn
95%
15.11.0.16(9024)_cn15.11.0.17(9502)_cn
tendacn-g1 (same device)
G3 Firmware· Tendacn
95%
15.11.0.16(9024)_cn15.11.0.17(9502)_cn
tendacn-g3 (same device)
G1· Tendacndevice
80%
All versions
G3· Tendacndevice
80%
All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

x_refsource_MISC
Source: [email protected]
https://hackmd.io/%40aZYpdinUS2SD-yhAeHwOkw/ry-t4QfMu

CVSS

9.8CRITICAL[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-78CWE-119

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