ZDI-CAN-30998: ZDI-26-672: Adobe Acrobat Reader DC PDF File Parsing Integer Underflow Information Disclosure Vulnerability
This vulnerability allows remote attackers to disclose sensitive information on affected installations of Adobe Acrobat Reader DC. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The ZDI has assigned a CVSS rating of 3.3. The following CVEs are assigned: CVE-2026-81977.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Adobe Acrobat Reader DCto a version that resolves this vulnerability.Patch ZDI-26-672 - Compensating control
Because user interaction is required (target must visit a malicious page or open a malicious file), restrict Adobe Acrobat Reader DC exposure to untrusted content by blocking/limiting access to unknown websites and restricting the opening of untrusted PDF files.
Event History
Frequently Asked Questions
What must an attacker do to exploit this issue?
An attacker must persuade the target to visit a malicious page or open a malicious file. The issue is exploitable remotely, but requires that user interaction.
What is the potential impact if exploitation succeeds?
Successful exploitation can disclose sensitive information from an affected Adobe Acrobat Reader DC installation. The assigned CVSS rating is 3.3.