Exploit for Reliance on Untrusted Inputs in a Security Decision in Microsoft CVE-2026-21509

Name: Exploit for Reliance on Untrusted Inputs in a Security Decision in Microsoft CVE-2026-21509
Rating: 5 (203 reviews)

2026-01-28 | CVSS 7.8

## https://sploitus.com/exploit?id=CB521E58-4131-5385-B620-DB1D990C23FB
# CVE-2026-21509-PoC
Educational PoC for CVE‑2026‑21509 (Microsoft Office security feature bypass). Generates a harmless DOCX with dummy OLE artifacts to study EDR/AV visibility. Not an exploit. For isolated labs only; see README for 7‑Zip inspection steps and mitigation references.