9.8
CRITICAL
CVE-2021-26747
Netis WF2780 and WF2411 Shell Injection Vulnerability
Description

Netis WF2780 2.3.40404 and WF2411 1.1.29629 devices allow Shell Metacharacter Injection into the ping command, leading to remote code execution.

INFO

Published Date :

Feb. 18, 2021, 9:15 p.m.

Last Modified :

Feb. 24, 2021, 8:19 p.m.

Remotely Exploitable :

Yes !

Impact Score :

5.9

Exploitability Score :

3.9
Affected Products

The following products are affected by CVE-2021-26747 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Netis-systems wf2411_firmware
2 Netis-systems wf2780_firmware
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-2021-26747.

URL Resource
http://www.netis-systems.com.tw/ Product Vendor Advisory
https://github.com/yhstar00/netis-route Exploit Third Party Advisory

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).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2021-26747 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2021-26747 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.

  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • Initial Analysis by [email protected]

    Feb. 24, 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 http://www.netis-systems.com.tw/ No Types Assigned http://www.netis-systems.com.tw/ Product, Vendor Advisory
    Changed Reference Type https://github.com/yhstar00/netis-route No Types Assigned https://github.com/yhstar00/netis-route Exploit, Third Party Advisory
    Added CWE NIST CWE-78
    Added CPE Configuration AND OR *cpe:2.3:o:netis-systems:wf2780_firmware:2.3.40404:*:*:*:*:*:*:* OR cpe:2.3:h:netis-systems:wf2780:-:*:*:*:*:*:*:*
    Added CPE Configuration AND OR *cpe:2.3:o:netis-systems:wf2411_firmware:1.1.29629:*:*:*:*:*:*:* OR cpe:2.3:h:netis-systems:wf2411:-:*:*:*:*:*:*:*
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2021-26747 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.96 }} 0.07%

score

0.83308

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability