Stack Buffer Overflow in Tenda AC11 Devices
CVE-2021-31755

9.8CRITICAL

Key Information:

Vendor
Tenda
Status
Ac11 Firmware
Vendor
CVE Published:
7 May 2021

Badges

👾 Exploit Exists🟣 EPSS 97%🦅 CISA Reported

Summary

A stack buffer overflow vulnerability exists in Tenda AC11 devices running firmware versions prior to 02.03.01.104_CN. This flaw lies in the /goform/setmac function, where an attacker can exploit the vulnerability by sending a specially crafted POST request. Successful exploitation may allow the attacker to execute arbitrary code on the device, potentially compromising its integrity and leading to unauthorized control.

CISA Reported

CISA provides regional cyber and physical services to support security and resilience across the United States. CISA monitor the most dangerious vulnerabilities and have identifed as being exploited but is not known by the CISA to be used in ransomware campaigns. This is subject to change at pace

The CISA's recommendation is: Apply updates per vendor instructions.

References

https://github.com/Yu3H0/IoT_CVE/tree/main/Tenda/CVE_3
x_refsource_MISC

EPSS Score

97% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • 👾

    Exploit known to exist

  • 🦅

    CISA Reported

  • Vulnerability published

  • Vulnerability Reserved

.