Live › vulnerability › CVE-2021-28550
Go to dashboardAdobe Acrobat and Reader contain a use-after-free memory bug that lets a crafted PDF run code as the current user. CISA lists it as actively exploited in the wild.
Summary written from the sources below. Check the originals before acting.
First seen by InfraStack 2026-10-23 19:11 UTC, 3h before NVD. All times on this page are UTC.
Apply updates per vendor instructions.
| Product | Ecosystem | Affected | Fixed in |
|---|---|---|---|
| Adobe Acrobat and Reader | vendor | – | – |
Open Acrobat or Reader and check Help > About to see the installed version, then compare it to the patched release in the Adobe advisory.
Update Adobe Acrobat and Reader to the patched version named in Adobe's advisory, as CISA directs.
Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
Acrobat Reader DC versions versions 2021.001.20150 (and earlier), 2020.001.30020 (and earlier) and 2017.011.30194 (and earlier) are affected by a Use After Free vulnerability. An unauthenticated attacker could leverage this vulnerability to achieve arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
This page as .md · .json · in your agent: get_signal("CVE-2021-28550")
CISA KEV catalog, Creative Commons 0 · EPSS scores by FIRST, used with attribution · NVD data is provided by NIST and is public domain. Posts quoted belong to their authors.