CVE-2021-27707

CRITICAL

Tenda G1/G3 <15.11.0.17(9502)_CN - Buffer Overflow

Title source: llm
STIX 2.1

Description

Buffer Overflow in Tenda G1 and G3 routers with firmware v15.11.0.17(9502)_CN allows remote attackers to execute arbitrary code via a crafted action/"portMappingIndex "request. This occurs because the "formDelPortMapping" function directly passes the parameter "portMappingIndex" to strcpy without limit.

References (1)

Core 1
Core References
Exploit, Third Party Advisory x_refsource_misc
https://hackmd.io/U7OVgYIuRcOKV7SW5-euHw

Scores

CVSS v3 9.8
EPSS 0.0311
EPSS Percentile 86.9%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-120
Status published
Products (2)
tenda/g1_firmware v15.11.0.17\(9502\)_cn
tenda/g3_firmware v15.11.0.17\(9502\)_cn
Published Apr 14, 2021
Tracked Since Feb 18, 2026