ZDI-26-676: Adobe Acrobat Reader DC DigSig Use-After-Free Remote Code Execution Vulnerability
ZDI disclosed CVE-2026-81973, a use-after-free in Adobe Acrobat Reader DC digital signature handling that enables remote code execution.
Zero Day Initiative advisory ZDI-26-676 describes a use-after-free vulnerability in the DigSig (digital signature) feature of Adobe Acrobat Reader DC. Exploitation requires the target to open a malicious file or visit a malicious page, after which arbitrary code can execute. The flaw carries a CVSS score of 7.8. No in-the-wild exploitation is reported.