DDNS credential disclosure via unchecked certificate hostname
Published Feb 3, 2026 · Updated Feb 3, 2026
Certificate validation in ASUSTOR Data Master 4.1.0 through 4.3.3.ROF1 and 5.0.0 through 5.1.1.RCI1 allows attackers to read DDNS secrets. The DDNS update process accepts a TLS certificate without matching its hostname to the configured DDNS server, then sends the account email, MD5-hashed password, and device serial number over that connection. Exploitation requires a network position permitting man-in-the-middle interception during a DDNS update; the documented consequence is disclosure of those values, not modification or service interruption.
Summary
What happened
Certificate validation in ASUSTOR Data Master 4.1.0 through 4.3.3.ROF1 and 5.0.0 through 5.1.1.RCI1 allows attackers to read DDNS secrets. The DDNS update process accepts a TLS certificate without matching its hostname to the configured DDNS server, then sends the account email, MD5-hashed password, and device serial number over that connection. Exploitation requires a network position permitting man-in-the-middle interception during a DDNS update; the documented consequence is disclosure of those values, not modification or service interruption.
The record
- CVE
- CVE-2026-24932
- Published
- Feb 3, 2026
- Updated
- Feb 3, 2026
- Vendor
- ASUSTOR Inc.
- Product
- ASUSTOR Data Master
- Classifications
- CWE-295, T1557
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Feb 3, 2026CVE publishedPublication date reported by the CVE source.
- 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.
- Affected versionversion=4.1.0 <=4.3.3.ROF1
- Affected versionversion=5.0.0 <=5.1.1.RCI1
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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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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