Critical severity · published May 7, 2021
CVE-2021-31755
Tenda AC11 Router Stack Buffer Overflow Vulnerability
In wildKEV
9.8
CVSS
86.5%
EPSS
Yes
On KEV
Description
An issue was discovered on Tenda AC11 devices with firmware through 02.03.01.104_CN. A stack buffer overflow vulnerability in /goform/setmac allows attackers to execute arbitrary code on the system via a crafted post request.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)86.5% · higher than 100% of CVEs
Exploited in the wildYes
CISA KEVListed Nov 3, 2021
Federal remediation dueNov 17, 2021
Ransomware campaign useNot known
Affected products
Which versions
AF
Ac11 Firmware · Tenda
through 02.03.01.104_cn · source: NVD
AR
AC11 Router · Tenda
All versions, or not specified · source: KEV
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-31755
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-31755
CISA KEV catalogue
https://www.cisa.gov/known-exploited-vulnerabilities-catalog
x_refsource_MISC
https://github.com/Yu3H0/IoT_CVE/tree/main/Tenda/CVE_3
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