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

What is CVE-2026-81977?

CVE-2026-81977 is a medium-severity vulnerability in Adobe Acrobat, published on 8 Sep 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official description

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.

Weakness: CWE-191

Which versions are affected by CVE-2026-81977?

It affects 3 products.

Products include Adobe Acrobat, Adobe Acrobat Dc, Adobe Acrobat Reader Dc.

How do I fix CVE-2026-81977?

No fix has been published for CVE-2026-81977 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-81977 being exploited?

There is no known exploitation of CVE-2026-81977 in the wild and no public exploit code.

Other vulnerabilities in Adobe Acrobat

• CVE-2021-28550 Adobe Acrobat and Reader Use-After-Free Exploited Critical 9.6
• CVE-2021-21017 Adobe Acrobat and Reader Heap-based Buffer Overflow Exploited High 8.8
• CVE-2014-0546 Adobe Reader and Acrobat Sandbox Bypass Exploited High 8.8
• CVE-2014-0496 Adobe Reader and Acrobat Use-After-Free Exploited High 8.8
• CVE-2013-3346 Adobe Reader and Acrobat Memory Corruption Exploited High 8.8

All Adobe Acrobat vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-w5v3-4m3m-384c.