CVE-2026-24936Network attack vector

Unauthenticated arbitrary file write via CGI parameters

Published Feb 3, 2026 · Updated Feb 3, 2026

Improper input validation in ASUSTOR ADM 4.1.0 through 4.3.3.ROF1 and 5.0.0 through 5.1.1.RCI1 allows remote attackers to write any file. The unnamed CGI program accepts unvalidated input parameters and uses them to write attacker-controlled data to arbitrary files. The affected function must be enabled during Active Directory domain joining; no authentication is required, and overwriting critical system files grants complete system compromise.

CVSS severity9.5
Critical
EPSS probability0.79%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in ASUSTOR ADM 4.1.0 through 4.3.3.ROF1 and 5.0.0 through 5.1.1.RCI1 allows remote attackers to write any file. The unnamed CGI program accepts unvalidated input parameters and uses them to write attacker-controlled data to arbitrary files. The affected function must be enabled during Active Directory domain joining; no authentication is required, and overwriting critical system files grants complete system compromise.

The record

CVE
CVE-2026-24936
Published
Feb 3, 2026
Updated
Feb 3, 2026
Vendor
ASUSTOR Inc.
Product
ASUSTOR Data Master
Classifications
CWE-20, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 3, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 3, 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.ROF1
  2. Affected versionversion=5.0.0 <=5.1.1.RCI1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ASUSTOR Inc. · ASUSTOR Data Masterversion=4.1.0 <=4.3.3.ROF1; version=5.0.0 <=5.1.1.RCI1

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.5ASUSTOR Inc.CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA: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.

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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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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