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CVE-2025-66273 is a command injection vulnerability affecting several QNAP operating system versions, including QTS and QuTS hero releases. The flaw allows an authenticated administrator to inject arbitrary system commands through a username parameter. Exploitation is possible over the network and does not require user interaction once valid administrator access has been obtained. Successful exploitation results in arbitrary command execution on the affected NAS or appliance.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
7 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A command injection vulnerability in QNAP NAS products that allows an authenticated administrator to inject arbitrary system commands via a username parameter.
A command injection vulnerability in QNAP systems that allows system command execution via the username parameter.
A command injection vulnerability that allows an authenticated administrator to inject arbitrary system commands via the username parameter and execute commands on the NAS.
A command injection vulnerability in several QNAP operating system versions that allows arbitrary command execution if a remote attacker has an administrator account.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.