CVE-2021-27705

CriticalCVSS 9.8/10Last modified Jun 17, 2026

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/"qosIndex "request. This occurs because the "formQOSRuleDel" function directly passes the parameter "qosIndex" to strcpy without limit.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-120

Affected software

No affected versions have been published.

Timeline

Published: Apr 14, 2021
Last modified: Jun 17, 2026
NVD status: Modified

Related CVEs from 2021

CVE-2021-277069.8Buffer Overflow in Tenda G1 and G3 routers with firmware version V15.11.0.17(9502)_CN allows remote attackers to execute arbitrary code via CVE-2021-277079.8Buffer Overflow in Tenda G1 and G3 routers with firmware v15.11.0.17(9502)_CN allows remote attackers to execute arbitrary code via a crafte CVE-2021-277089.8Command Injection in TOTOLINK X5000R router with firmware v9.1.0u.6118_B20201102, and TOTOLINK A720R router with firmware v4.1.5cu.470_B2020 CVE-2021-277109.8Command Injection in TOTOLINK X5000R router with firmware v9.1.0u.6118_B20201102, and TOTOLINK A720R router with firmware v4.1.5cu.470_B2020 CVE-2021-277159.8An issue was discovered in MoFi Network MOFI4500-4GXeLTE-V2 3.5.6-xnet-5052 allows attackers to bypass the authentication and execute arbitr CVE-2021-277225.5An issue was discovered in Nsasoft US LLC SpotAuditor 5.3.5. The program can be crashed by entering 300 bytes char data into the "Key" or "N CVE-2021-277309.8Accellion FTA 9_12_432 and earlier is affected by argument injection via a crafted POST request to an admin endpoint. The fixed version is F CVE-2021-277316.1Accellion FTA 9_12_432 and earlier is affected by stored XSS via a crafted POST request to a user endpoint. The fixed version is FTA_9_12_44 CVE-2021-277335.4In JetBrains YouTrack before 2020.6.6441, stored XSS was possible via an issue attachment.CVE-2021-277349.8Hirschmann HiOS 07.1.01, 07.1.02, and 08.1.00 through 08.5.xx and HiSecOS 03.3.00 through 03.5.01 allow remote attackers to change the crede CVE-2021-277366.5FusionAuth fusionauth-samlv2 before 0.5.4 allows XXE attacks via a forged AuthnRequest or LogoutRequest because parseFromBytes uses javax.xm CVE-2021-277377.5Apache Traffic Server 9.0.0 is vulnerable to a remote DOS attack on the experimental Slicer plugin.