CVE-2026-6644 is a command injection vulnerability affecting PPTP VPN Clients in ASUSTOR ADM. The flaw is caused by insufficient validation of user-supplied input before that input is passed to a system shell. An administrative user can exploit this weakness to escape the restricted web management environment and execute arbitrary commands on the underlying operating system. Affected versions are ADM 4.1.0 through 4.3.3.RR42 and ADM 5.0.0 through 5.1.2.REO1.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
Small repository containing a public write-up and a single Python proof-of-concept reproducer for CVE-2026-6644, an authenticated OS command injection in the ASUSTOR ADM PPTP VPN Client. Repository structure is minimal: GitHub Pages/Jekyll files (.github/workflows/pages.yml, _config.yml, index.md) publish the advisory, while poc_CVE-2026-6644_pptp_injection.py is the only exploit-related code. The markdown explains that the vulnerable web component is /portal/apis/settings/vpn.cgi, where the PPTP server address is written into a pppd configuration pty directive without escaping; because pppd executes the pty value via /bin/sh, an authenticated administrator can achieve root command execution. The Python PoC does not contact a live ASUSTOR device and is explicitly a local reproducer: it constructs the vulnerable pty string using /usr/builtin/bin/pptp, invokes /bin/sh -c to emulate pppd behavior, and uses a shell payload that runs id and writes the result to a temp evidence file. This confirms exploitability mechanics but is not a full remote exploit against the web interface. Overall capability: demonstrate authenticated root-level command injection primitive and show how attacker-controlled server input can escape quoting and execute arbitrary shell commands.
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Cross-references every affected SKU, including bundled OEM variants.
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