Security researchers in the United Kingdom said it took SonicWall more than two weeks to patch a vulnerability in 1.9 million SonicWall user groups, affecting some 10 million managed devices and 500,000 organizations.

In a blog released by Pen Test Partners, the researchers said the response took far too long for this type of flaw. SonicWall countered by saying that the company responded promptly and no vulnerabilities were exploited.

According to the blog, attackers could have potentially taken advantage of an IDOR to access the SonicWall cloud service. An IDOR is a flaw in an API or web application that does not check authorization properly, allowing an attacker to access unauthorized data.

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