Cybersecurity firm F5 forecasts annual revenue below Wall Street estimates due to a recent systems breach, causing shares to drop 5.8% in after-hours trading. Hackers had long-term access to company systems, with the breach attributed to state-backed hackers from China. U.S. officials have urged immediate action. F5 anticipates near-term disruption to sales cycles as customers assess and remediate environments. The company expects full-year revenue growth of 0% to 4%, with first-quarter revenue potentially impacted by the U.S. government shutdown.

Read more at Yahoo Finance: F5 warns breach that alarmed governments will weigh on sales, shares slide