CVE-2026-6644
A command injection vulnerability was found in the PPTP VPN Clients on the ADM
Description
A command injection vulnerability was found in the PPTP VPN Clients on the ADM. The vulnerability allows an administrative user to break out of the restricted web environment and execute arbitrary code on the underlying operating system. This occurs due to insufficient validation of user-supplied input before it is passed to a system shell. Successful exploitation allows an attacker to achieve Remote Code Execution (RCE) and fully compromise the system. Affected products and versions include: from ADM 4.1.0 through ADM 4.3.3.RR42 as well as from ADM 5.0.0 through ADM 5.1.2.REO1.
INFO
Published Date :
April 20, 2026, 7:16 a.m.
Last Modified :
April 30, 2026, 1:16 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | CRITICAL | [email protected] | ||||
| CVSS 4.0 | CRITICAL | f35eaae9-79f2-4d0d-a5c7-7bea6ed6be77 | ||||
| CVSS 4.0 | CRITICAL | [email protected] |
Solution
- Update PPTP VPN clients to a patched version.
- Validate all user input before system shell execution.
- Restrict administrative access to the system.
Public PoC/Exploit Available at Github
CVE-2026-6644 has a 1 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-2026-6644.
| URL | Resource |
|---|---|
| https://https://www.asustor.com/security/security_advisory_detail?id=55 | Broken Link Vendor Advisory |
| https://uky007.github.io/CVE-2026-6644/ |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-6644 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-2026-6644
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
Python
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-6644 vulnerability anywhere in the article.
-
Daily CyberSecurity
ASUSTOR Issues Critical Patch: Command Injection Vulnerability Threatens ADM Users
ASUSTOR has issued an urgent security advisory regarding a high-severity command injection vulnerability impacting its ASUSTOR Data Master (ADM) operating system. Identified as CVE-2026-6644, this fla ... Read more
-
Daily CyberSecurity
ZionSiphon: The “Defanged” Malware Aiming for the Water Supply
A new and highly specialized malware threat has emerged in the industrial cybersecurity landscape, signaling a targeted effort to disrupt critical infrastructure. Security researchers from Darktrace r ... Read more
The following table lists the changes that have been made to the
CVE-2026-6644 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 134c704f-9b21-4f2e-91b3-4a467353bcc0
Apr. 30, 2026
Action Type Old Value New Value Added Reference https://uky007.github.io/CVE-2026-6644/ -
Initial Analysis by [email protected]
Apr. 22, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H Added CPE Configuration OR *cpe:2.3:o:asustor:data_master:*:*:*:*:*:*:*:* versions from (including) 5.0.0.ra82 up to (excluding) 5.1.2.reo1 *cpe:2.3:o:asustor:data_master:*:*:*:*:*:*:*:* versions from (including) 4.1.0.rhu2 up to (excluding) 4.3.3.RR42 Added Reference Type ASUSTOR, Inc.: https://https://www.asustor.com/security/security_advisory_detail?id=55 Types: Broken Link, Vendor Advisory -
New CVE Received by [email protected]
Apr. 20, 2026
Action Type Old Value New Value Added Description A command injection vulnerability was found in the PPTP VPN Clients on the ADM. The vulnerability allows an administrative user to break out of the restricted web environment and execute arbitrary code on the underlying operating system. This occurs due to insufficient validation of user-supplied input before it is passed to a system shell. Successful exploitation allows an attacker to achieve Remote Code Execution (RCE) and fully compromise the system. Affected products and versions include: from ADM 4.1.0 through ADM 4.3.3.RR42 as well as from ADM 5.0.0 through ADM 5.1.2.REO1. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-78 Added Reference https://https://www.asustor.com/security/security_advisory_detail?id=55