An example of a vulnerability of an even older version of Opera for Windows, that let an attacker totally own the client computer: <a href="https:&#x2F;&#x2F;web.nvd.nist.gov&#x2F;view&#x2F;vuln&#x2F;detail?vulnId=CVE-2010-1349" rel="nofollow">https:&#x2F;&#x2F;web.nvd.nist.gov&#x2F;view&#x2F;vuln&#x2F;detail?vulnId=CVE-2010-13...</a><p>&quot;Large values in the HTTP Content-Length header can cause Opera to crash. Certain specific values can cause a memory corruption, which in some cases can allow arbitrary code to be injected and executed. In most cases Opera will just crash. To inject code, additional techniques will have to be employed.&quot;<p>More details in the pages linked to the URL I provided.