CVE-2026-6644Public exploitNetwork attack vector

Root command execution via unescaped PPTP server address

Published Apr 20, 2026 · Updated Apr 20, 2026

OS command injection in ASUSTOR ADM 4.1.0 through 4.3.3.RR42 and 5.0.0 through 5.1.2.REO1 allows remote authenticated users to run commands as root. The /portal/apis/settings/vpn.cgi connect handler writes the PPTP server address into pppd's pty directive without escaping, and pppd passes that directive to /bin/sh. Administrator authentication is required; successful injection escapes the web interface and grants root-level control of the NAS.

CVSS severity9.4
Critical
EPSS probability1.45%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in ASUSTOR ADM 4.1.0 through 4.3.3.RR42 and 5.0.0 through 5.1.2.REO1 allows remote authenticated users to run commands as root. The /portal/apis/settings/vpn.cgi connect handler writes the PPTP server address into pppd's pty directive without escaping, and pppd passes that directive to /bin/sh. Administrator authentication is required; successful injection escapes the web interface and grants root-level control of the NAS.

The record

CVE
CVE-2026-6644
Published
Apr 20, 2026
Updated
Apr 20, 2026
Vendor
ASUSTOR Inc.
Product
ASUSTOR Data Master
Classifications
CWE-78, CAPEC-108, T1059.004
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Apr 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 20, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.1.0 <=4.3.3.RR42
  2. Affected versionversion=5.0.0 <=5.1.2.REO1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

ASUSTOR Inc. · ASUSTOR Data Masterversion=4.1.0 <=4.3.3.RR42; version=5.0.0 <=5.1.2.REO1

Published CVSS scores

9.4ASUSTOR Inc.CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
9.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CAPEC-108Command Line Execution through SQL Injection
T1059.004Unix Shell

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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