Cisco Systems (CSCO) Stock News on Dec. 19, 2025: Record-High Run, Analyst Price Targets, AI Networking Tailwinds—and a New Zero-Day Risk
Cisco shares closed at $78.43 on Dec. 19, up 1.9%, after recently surpassing their March 2000 dot-com peak. The move follows raised full-year guidance and strong AI infrastructure demand. Traders also reacted to a cybersecurity issue involving Cisco email security products and new insider filings after the stock’s multi-decade high. U.S. tech stocks broadly advanced amid renewed AI optimism.