CVE-2026-81977: Acrobat Reader | Integer Underflow (Wrap or Wraparound) (CWE-191)

Q: What must an attacker do to exploit this issue?

The attacker must provide a malicious file and persuade a victim to open it in Acrobat Reader. The vulnerability has local attack vector, requires low attack complexity, and does not require privileges.

Q: What is the likely impact if exploitation succeeds?

Successful exploitation could disclose sensitive information from memory. The provided impact assessment indicates high confidentiality impact, with no integrity or availability impact.

Published Sep 8, 2026

Updated

Acrobat Reader is affected by an Integer Underflow (Wrap or Wraparound) vulnerability that could lead to disclosure of sensitive memory. An attacker could leverage this vulnerability to disclose sensitive information. Exploitation of this issue requires user interaction in that a victim must open a malicious file.

Affected Software

6 affected components

Acrobat Reader

All of the following

Any of the following

Adobe Acrobat>=24.001.20604<24.001.30429

Adobe Acrobat DC>=15.008.20082<26.002.21901

Adobe Acrobat Reader DC>=15.008.20082<26.002.21901

Any of the following

Apple macOS

Microsoft Windows

Event History

Sep 8, 2026

CVE Published

via MITRE·08:31 PM

Data Sourced

via MITRE·08:31 PM

DescriptionSeverityWeakness

Data Sourced

via NVD·09:18 PM

DescriptionSeverityWeaknessAffected Software

Frequently Asked Questions

What must an attacker do to exploit this issue?

The attacker must provide a malicious file and persuade a victim to open it in Acrobat Reader. The vulnerability has local attack vector, requires low attack complexity, and does not require privileges.

What is the likely impact if exploitation succeeds?