QNAP QTS/QuTS hero User Account out-of-bounds write

CVSS Meta Temp Score
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CTI Interest Score
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6.0$0-$5k0.00

Summaryinfo

A vulnerability has been found in QNAP QTS and QuTS hero and classified as critical. Affected is an unknown function of the component User Account Handler. The manipulation leads to out-of-bounds write. This vulnerability is uniquely identified as CVE-2025-30273. The attack is possible to be carried out remotely. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in QNAP QTS and QuTS hero (the affected version unknown). It has been rated as critical. This issue affects an unknown part of the component User Account Handler. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. Using CWE to declare the problem leads to CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

An out-of-bounds write vulnerability has been reported to affect several QNAP operating system versions. If a remote attacker gains a user account, they can then exploit the vulnerability to modify or corrupt memory. We have already fixed the vulnerability in the following versions: QTS 5.2.5.3145 build 20250526 and later QuTS hero h5.2.5.3138 build 20250519 and later

The weakness was disclosed by coral as qsa-25-21. It is possible to read the advisory at qnap.com. The identification of this vulnerability is CVE-2025-30273 since 03/20/2025. The exploitation is known to be easy. The attack may be initiated remotely. The technical details are unknown and an exploit is not publicly available.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at CERT Bund (WID-SEC-2025-1936). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Affected

  • QNAP NAS

Productinfo

Type

Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.0

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Out-of-bounds write
CWE: CWE-787 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Timelineinfo

03/20/2025 CVE reserved
08/29/2025 +161 days Advisory disclosed
08/29/2025 +0 days VulDB entry created
09/01/2025 +3 days VulDB entry last update

Sourcesinfo

Vendor: qnap.com

Advisory: qsa-25-21
Researcher: coral
Status: Confirmed

CVE: CVE-2025-30273 (🔒)
GCVE (CVE): GCVE-0-2025-30273
GCVE (VulDB): GCVE-100-321947
CERT Bund: WID-SEC-2025-1936 - QNAP NAS QTS und QTS hero: Mehrere Schwachstellen

Entryinfo

Created: 08/29/2025 23:24
Updated: 09/01/2025 11:00
Changes: 08/29/2025 23:24 (68), 09/01/2025 11:00 (7)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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