Intrusion Inc.

Item 7.01 Regulation FD Disclosure. On July 21, 2026, Intrusion Inc. (the “Company”) issued a press release providing a business update highlighting the Company's operational execution and strategic momentum following its combination with VigilAigent, as well as announcing its Investor Technology Day scheduled for July 22, 2026. A copy of the press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference. The information in this Item 7.01 of Form 8-K, including Exhibit 99.1 attached hereto, shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as expressly set forth by specific reference in such a filing. Item 9.01. Financial Statements and Exhibits. (d) Exhibits. Exhibit Description No. ──────────────────────────────────────────────────────────────────────────────────────────── 99.1 Press Release issued by Intrusion Inc., dated July 21, 2026. 104 Cover Page Interactive Data File (embedded within the Inline XBRL document)