Hackers actively craft PDFs that exploit known flaws in older Acrobat versions. If you open a malicious PDF with 11.0.23, an attacker could take control of your computer, install ransomware, or steal credentials. The lack of patches means you are completely exposed.

Adobe Acrobat Xi Pro 11.0.23 [patched]

Hackers actively craft PDFs that exploit known flaws in older Acrobat versions. If you open a malicious PDF with 11.0.23, an attacker could take control of your computer, install ransomware, or steal credentials. The lack of patches means you are completely exposed.