CVE-2026-81977: Integer Underflow (Wrap or Wraparound) (CWE-191) in Adobe Adobe Acrobat

CVE-2026-81977 is an integer underflow (wrap or wraparound) vulnerability in Adobe Acrobat that could lead to disclosure of sensitive memory. An attacker must convince a user to open a specially crafted malicious file to exploit this vulnerability. The flaw could allow unauthorized disclosure of sensitive information from memory, but does not impact integrity or availability. The vulnerability affects Adobe Acrobat versions up to and including 26.002.21900 and 24.001.30383. There is no vendor advisory or patch information provided in the input data.

Successful exploitation may result in disclosure of sensitive information from memory. The vulnerability does not affect integrity or availability. Exploitation requires user interaction (opening a malicious file). No known exploits in the wild have been reported.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a patch is available, users should avoid opening files from untrusted sources to mitigate risk.