Out-of-bounds write in Adobe Reader and Adobe Acrobat - CVE-2021-21086

Vulnerability details

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error when processing PDF files. A remote attacker can create a specially crafted PDF file, trick the victim into opening it, trigger a buffer overflow and execute arbitrary code on the system.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Affected software

How to mitigate CVE-2021-21086

Links to Public Exploits and PoC-codes

• Exploit #7102 - Exploit-CVE-2021-21086 () (December 3, 2021)

External References

• https://helpx.adobe.com/security/products/acrobat/apsb21-09.html
• https://helpx.adobe.com/security/products/acrobat/apsb21-29.html

Related Security Bulletins

• Multiple vulnerabilities in Adobe Reader and Acrobat