ZDI-26-669: Adobe Acrobat Reader DC JBIG2 File Parsing Out-Of-Bounds Read Information Disclosure Vulnerability

Timeline

Detection, updates, and resolution for this record.

1. Sep 10, 2026 · Catalog

   Detected

   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-2026-81978.

Sources

• CVE.orgVulnerability recordCVE-2026-81978

  Official CVE identifier

  cve.org
• FIRST EPSSExploitation probabilityCVE-2026-81978

  30-day exploitation probability 0.3%

  first.org
• Zero Day InitiativeCoordinated disclosureZDI-26-669

  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-2026-81978.

  zerodayinitiative.com