Simply opening a PDF could trigger this Adobe Reader zero-day

Simply opening a PDF could trigger this Adobe Reader zero-day

Don’t have an account? Sign up > Try our antivirus with a free, full-featured 14-day trial Protect your team’s devices and data – no IT skills needed Explore award-winning endpoint security for your business Opening the wrong PDF in Adobe Reader was enough to let criminals quietly spy on your computer and unleash more attacks, even though everything looked normal. A researcher analyzed a malicious PDF and found that it abused a previously unknown flaw (a “zero‑day”) in Adobe Acrobat Reader. When a victim simply opens this PDF, hidden code inside it can read files that Acrobat Reader should not be allowed to access and send them to an attacker’s server. Some tests show that it allows attackers to pull in additional malicious code from a remote server and run it on the victim’s machine, potentially escaping Adobe’s sandbox protections. In its security bulletin, Adobe acknowledges that the

Source: https://www.malwarebytes.com/blog/news/2026/04/simply-opening-a-pdf-could-trigger-this-adobe-reader-zero-day