CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in the Registration Statements on Form S-8 (Nos. 333-183101, 333-167329, 333-112935, 333-56216, 333-35992, and 333-218507) of SIGA Technologies, Inc. of our report dated March6, 2018 relating to the financial statementsand the effectiveness of internal control over financial reporting, which appears in this Form 10-K.

/s/ PRICEWATERHOUSECOOPERS LLP
Florham Park, New Jersey
March6, 2018