CVE-2026-24934Network attack vector

DDNS record corruption via unvalidated WAN-IP response

Published Feb 3, 2026 · Updated Feb 3, 2026

Improper certificate 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 corrupt DDNS records. The DDNS WAN-IP lookup uses plain HTTP or accepts an external server's unvalidated TLS certificate, so a forged response supplies the address published to DDNS. Exploitation requires a network position that permits interception of the lookup; it changes the hostname's resolved IP address without exposing data or interrupting the NAS.

CVSS severity6.3
Medium
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper certificate 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 corrupt DDNS records. The DDNS WAN-IP lookup uses plain HTTP or accepts an external server's unvalidated TLS certificate, so a forged response supplies the address published to DDNS. Exploitation requires a network position that permits interception of the lookup; it changes the hostname's resolved IP address without exposing data or interrupting the NAS.

The record

CVE
CVE-2026-24934
Published
Feb 3, 2026
Updated
Feb 3, 2026
Vendor
ASUSTOR Inc.
Product
ASUSTOR Data Master
Classifications
CWE-295, CAPEC-158, T1557
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

3.7NIST NVDCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
6.3ASUSTOR Inc.CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-295Improper Certificate Validation
CAPEC-158Sniffing Network Traffic
T1557Adversary-in-the-Middle

Public exploit references

No public exploit references are available in this record.

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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