Here are a few ways to rewrite the title in a formal tone, depending on your preferred level of conciseness:

• Option 1 (Most formal/journalistic): DHQ Expresses Concern Over Hostile Propaganda and Escalating Social Media Misinformation
• Option 2 (Direct and authoritative): Defense Headquarters Attributes Rising Misinformation to Hostile Social Media Propaganda
• Option 3 (Concise): DHQ Decries the Impact of Hostile Propaganda and Social Media Misinformation

Recommendation: Option 1 is the most standard for institutional reporting and formal news coverage.

Here is a formal, concise version of your title:

On the Perils of Knowledge: Reflecting on Isaac Asimov’s Insight in the Age of Misinformation