Resources

This section contains a variety of useful resources regarding computer hardware, software, and general support information. We have provided these links for your convenience and personal research. Inclusion of a link on this website does not imply that we are affiliated with the third party website's owners or sponsors. We are not responsible for the content or accuracy of those sites, or the products or services offered on or through those sites.

Known Issues

Adobe rolls out emergency fix for Acrobat, Reader zero-day flaw

Adobe has released an emergency security update for Acrobat Reader to fix a vulnerability, tracked as CVE-2026-34621, that has been exploited in zero-day attacks since at least December. The flaw allows malicious PDF files to bypass sandbox restrictions and invoke privileged JavaScript APIs, potentially leading to arbitrary code execution. The exploit observed in attacks enables reading and stealing arbitrary files. No user interaction is required beyond opening the malicious PDF. Specifically, the exploit abuses APIs like util.readFileIntoStream() to read arbitrary local files and RSS.addFeed() to exfiltrate data and fetch additional attacker-controlled code. The security issue was discovered by Haifei Li, founder of the EXPMON exploit detection system, after someone submitted for analysis a PDF sample named "yummy_adobe_exploit_uwu.pdf." Haifei Li says that someone submitted the sample to EXPMON on March 26, but it had been sent to VirusTotal three days before, where only five out of 64 security vendors flagged it as malicious at the time. The researcher decided to manually investigate the issue after the exploit detection system activated its "detection in depth" feature, an advanced detection capability Haifei Li specifically developed for Adobe Reader, he says in a blog post last week.