Netskope Threat Labs

FILE-PDF Adobe Acrobat Reader improper verification of Cryptographic Signature detected

IPS-CFWIPS-SWG

1 SID: 152076

Detects a PDF exploiting CVE-2026-27278, a flaw in Adobe Acrobat Reader's signature verification that accepts documents with invalid cryptographic signatures. Bypassing signature checks undermines non-repudiation workflows that rely on signed documents.