CVE-2025-30273: qts Memory Corruption — Fix

Description

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

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CVSS v3.1 Score

8.1

HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

Weakness Type (CWE)

CWE-787 Out-of-bounds Write

Affected Products

Vendor	Product	Versions
qnap	qts	All
qnap	qts	All
qnap	qts	All
qnap	qts	All
qnap	qts	All
qnap	qts	All
qnap	qts	All
qnap	qts	All
qnap	qts	All
qnap	qts	All
qnap	qts	All
qnap	qts	All
qnap	qts	All
qnap	quts_hero	All
qnap	quts_hero	All
qnap	quts_hero	All
qnap	quts_hero	All
qnap	quts_hero	All
qnap	quts_hero	All
qnap	quts_hero	All
qnap	quts_hero	All
qnap	quts_hero	All
qnap	quts_hero	All
qnap	quts_hero	All
qnap	quts_hero	All
qnap	quts_hero	All

References

Advisories & Patches

https://www.qnap.com/en/security-advisory/qsa-25-21

Frequently Asked Questions

What is CVE-2025-30273? +

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 It has a CVSS v3.1 base score of 8.1 (HIGH).

How severe is CVE-2025-30273? +

CVE-2025-30273 has a CVSS v3.1 score of 8.1 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

What products are affected by CVE-2025-30273? +

CVE-2025-30273 affects products from qnap, specifically: qts, quts_hero. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-30273? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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