Secret disclosure or memory modification via format string
Published Oct 3, 2025 · Updated Oct 3, 2025
Externally controlled format strings in QNAP QTS 5.2.x and QuTS hero h5.2.x allow remote authenticated users to expose secrets or alter memory. QNAP has not identified the affected component or disclosed how attacker-controlled text becomes a format string in the vulnerable operation. Exploitation requires an administrator account and is bounded to secret-data exposure or memory modification; no code execution is reported.
Summary
What happened
Externally controlled format strings in QNAP QTS 5.2.x and QuTS hero h5.2.x allow remote authenticated users to expose secrets or alter memory. QNAP has not identified the affected component or disclosed how attacker-controlled text becomes a format string in the vulnerable operation. Exploitation requires an administrator account and is bounded to secret-data exposure or memory modification; no code execution is reported.
The record
- CVE
- CVE-2025-53406
- Published
- Oct 3, 2025
- Updated
- Oct 3, 2025
- Vendor
- Linn Products Limited
- Product
- QuTS hero
- Classifications
- CWE-134, CAPEC-135
- Attack vector
- network
- Privileges
- admin
Timeline
How it unfolded
- Oct 3, 2025CVE publishedPublication date reported by the CVE source.
- Oct 3, 2025Record 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=h5.2.x <h5.2.6.3195 build 20250715
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
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
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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