Taiwanese company QNAP has released updates to remediate a critical security flaw affecting its network-attached storage (NAS) devices that could lead to arbitrary code injection.

Tracked as CVE-2022-27596, the vulnerability is rated 9.8 out of a maximum of 10 on the CVSS scoring scale. It affects QTS 5.0.1 and QuTS hero h5.0.1.

"If exploited, this vulnerability allows remote attackers to inject malicious code," QNAP said in an advisory released Monday.

The exact technical specifics surrounding the flaw are unclear, but the NIST National Vulnerability Database (NVD) has categorized it as an SQL injection vulnerability.

This means an attacker could send specially crafted SQL queries such that they could be weaponized to bypass security controls and access or alter valuable information.

"Just as it may be possible to read sensitive information, it is also possible to make changes or even delete this information with a SQL injection attack," according to MITRE.

The vulnerability has been addressed in versions QTS 5.0.1.2234 build 20221201 and later, as well as QuTS hero h5.0.1.2248 build 20221215 and later.

Zero-day vulnerabilities in exposed QNAP appliances have been put to use by DeadBolt ransomware actors to breach target networks, making it essential to update to the latest version in order to mitigate potential threats.

To apply the updates, users are advised to log in to QTS or QuTS hero as an administrator, navigate to Control Panel > System > Firmware Update, and select "Check for Update" under the "Live Update" section.