CVE-2021-31755
Tenda AC11 Router Stack Buffer Overflow Vulnerability - [Actively Exploited]
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.
INFO
Published Date :
May 7, 2021, 11:15 p.m.
Last Modified :
April 3, 2025, 7:15 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CISA KEV (Known Exploited Vulnerabilities)
For the benefit of the cybersecurity community and network defenders—and to help every organization better manage vulnerabilities and keep pace with threat activity—CISA maintains the authoritative source of vulnerabilities that have been exploited in the wild.
Tenda AC11 devices contain a stack buffer overflow vulnerability in /goform/setmac which allows attackers to execute code via a crafted post request.
Apply updates per vendor instructions.
https://nvd.nist.gov/vuln/detail/CVE-2021-31755
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 2.0 | HIGH | [email protected] | ||||
| CVSS 3.1 | CRITICAL | [email protected] | ||||
| CVSS 3.1 | CRITICAL | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
Solution
- Update to a newer version of device firmware.
Public PoC/Exploit Available at Github
CVE-2021-31755 has a 7 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-31755.
| URL | Resource |
|---|---|
| https://github.com/Yu3H0/IoT_CVE/tree/main/Tenda/CVE_3 | Exploit Issue Tracking Third Party Advisory Broken Link |
| https://github.com/Yu3H0/IoT_CVE/tree/main/Tenda/CVE_3 | Exploit Issue Tracking Third Party Advisory Broken Link |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-31755 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-31755
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
None
cve-2019-11248 cve-2023-3824 cve-2024-5057 cve cve-2001-1473 cve-2021-31755 cve-2023-21716 exploit poc rce poc-cve
cve-2019-11248 cve-2020-1938 cve-2001-1473 cve-2021-31755 cve-2023-21716 cve-2024-5057
cve-2019-11248 cve-2020-1938 cve-2001-1473 cve-2021-31755 cve-2023-21716 cve-2024-5057
自动搜集每天的漏洞poc和exp信息。
POC cve-2021-31755
cve exploit poc cve-2021-31755 poc-cve-2021-31755
Shell
Ostorlab KEV: One-command to detect most remotely known exploitable vulnerabilities. Sourced from CISA KEV, Google's Tsunami, Ostorlab's Asteroid and Bug Bounty programs.
cisa-kev vulnerability 0day cisa exploits
essential templates for kenzer [DEPRECATED]
kenzer vulnerabilities kenzer-templates arpsyndicate
Python Shell Ruby
poc of ImageMagick hangs
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-31755 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-31755 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Modified Analysis by [email protected]
Apr. 03, 2025
Action Type Old Value New Value Changed Reference Type MITRE: https://github.com/Yu3H0/IoT_CVE/tree/main/Tenda/CVE_3 Types: Exploit, Issue Tracking, Third Party Advisory MITRE: https://github.com/Yu3H0/IoT_CVE/tree/main/Tenda/CVE_3 Types: Broken Link, Exploit, Issue Tracking, Third Party Advisory Changed Reference Type CVE: https://github.com/Yu3H0/IoT_CVE/tree/main/Tenda/CVE_3 Types: Exploit, Issue Tracking, Third Party Advisory CVE: https://github.com/Yu3H0/IoT_CVE/tree/main/Tenda/CVE_3 Types: Broken Link, Exploit, Issue Tracking, Third Party Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Feb. 04, 2025
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Added CWE CWE-787 -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://github.com/Yu3H0/IoT_CVE/tree/main/Tenda/CVE_3 -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Initial Analysis by [email protected]
May. 10, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:C/I:C/A:C) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Changed Reference Type https://github.com/Yu3H0/IoT_CVE/tree/main/Tenda/CVE_3 No Types Assigned https://github.com/Yu3H0/IoT_CVE/tree/main/Tenda/CVE_3 Exploit, Issue Tracking, Third Party Advisory Added CWE NIST CWE-787 Added CPE Configuration AND OR *cpe:2.3:o:tenda:ac11_firmware:*:*:*:*:*:*:*:* versions up to (including) 02.03.01.104_cn OR cpe:2.3:h:tenda:ac11:-:*:*:*:*:*:*:*
Vulnerability Scoring Details
Base CVSS Score: 9.8
Base CVSS Score: 10
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
94.23 }} 0.08%
score
0.99918
percentile