The acknowledgment by Zscaler of a threat actor's claim of obtaining unauthorized information could negatively impact the company's stock price in the short term. This situation raises concerns about the effectiveness of Zscaler's cybersecurity measures, potentially affecting its reputation, customer trust, and ultimately, its financial performance. Investors may react negatively to this news, leading to a decrease in stock price as the market assesses the potential risks and implications for Zscaler's business.