Adobe Acrobat Dc V21.001.20135 Site
The heads-up display (HUD) was updated to auto-undock based on the size of the application window for better visibility.
Users gained the ability to create a blank page PDF directly from the main File menu. Critical Security and Bug Fixes
Released on February 9, 2021, was a critical planned update for the Continuous Track of the Adobe Document Cloud family. This version was primarily a security-focused release aimed at patching several high-severity vulnerabilities, including at least one (CVE-2021-21017) that had been exploited in the wild. Key Features and Improvements Adobe Acrobat DC v21.001.20135
Windows users received an enhanced crash dialog to help Adobe diagnose and fix recurring stability issues. Known Issues and Rapid Follow-up
The release included significant enhancements to the browser extension to improve its reliability and performance. The heads-up display (HUD) was updated to auto-undock
While the update prioritized system safety, it also introduced several quality-of-life enhancements for desktop users:
Shortly after its release, users reported specific bugs in v21.001.20135, such as persistent security warnings when opening sub-PDFs within "Contents" documents. Adobe quickly addressed these stability and functional issues by releasing a follow-up patch, , just days later on February 15, 2021. Bug version 21.001.20135 - Adobe Community This version was primarily a security-focused release aimed
Adobe designated this as a "planned update" but urged immediate installation due to its security implications:


