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 94%🦅 CISA Reported

What is CVE-2021-31755?

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 has reported CVE-2021-31755

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 CVE-2021-31755 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

94% 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

.