PatchTheCVECVE-2026-6644: A command injection vulnerability was found in the PPTP VPN Clients on the ADM
CVE-2026-6644 is a critical-severity flaw (CVSS 9.1) affecting data master. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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
Why this priority
- Critical severity
A fixed release or distro patch exists.
Risk facts
| CVSS score | 9.1 (Critical) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | High |
| User interaction | None |
| EPSS exploit chance | 1.5% (top 27%) |
| CISA exploited list | No |
| Weakness | CWE-78 |
| Published | 2026-04-20 |
| Last modified | 2026-10-26 |
Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-6644?
data master: upgrade to 4.3.3.RR42, 5.1.2.reo1. Exact commands for each OS are on this page.
Is CVE-2026-6644 being exploited?
CVE-2026-6644 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-6644 affect?
CVE-2026-6644 affects data master. Severity is critical (CVSS 9.1). 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. Th
How urgent is CVE-2026-6644?
Priority 50/100. Critical severity
Related CVEs
- CVE-2026-6643 CRITICAL 9.9 UPGRADE A stack-based buffer overflow vulnerability was found in the VPN Clients on the ADM
- CVE-2026-67248 HIGH 8.8 UPGRADE A stack-based buffer overflow vulnerability was found in the File Explorer on the ADM
- CVE-2026-18186 HIGH 8.1 UPGRADE A stored format string vulnerability was found in the FTP Backup on the ADM
- CVE-2026-18187 HIGH 8.1 UPGRADE A format string vulnerability was found in the Internal Backup on the ADM
- CVE-2026-18188 HIGH 8.1 UPGRADE A format string vulnerability was found in the Rsync Backup on the ADM