Security Bulletin

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Patch now: Cisco recently disclosed four actively exploited zero-days affecting millions of devices, including three targeted by a nation-state actor previously discovered to be behind the "ArcaneDoor" campaign.

The China-linked cyber-espionage group UNC5221 is compromising network appliances that cannot run traditional EDR agents to deploy new versions of the "Brickstorm" backdoor.

We've reached a milestone that underscores this legacy: Cisco has been granted its 25,000th U.S. patent. This is not just a number; it is proof of the scale, consistency, and depth of the ideas born inside Cisco.

How one university transformed its infrastructure—and its future—through a strategic partnership and visionary leadership.

Yet again researchers have uncovered an opportunity (dubbed "ForcedLeak" for indirect prompt injection against autonomous agents lacking sufficient security controls — but this time the risk involves PII, corporate secrets, physical location data...

Cisco is named a 2025 IDC MarketScape Leader for Enterprise Video Conferencing, recognizing our innovation, security, and partner-driven success that delivers unmatched collaboration solutions for every customer need.

Cisco announces software that makes distributed quantum computing work — releasing three research prototypes to advance Cisco’s quantum networking strategy:

Proactive problem-solving starts with a holistic, layer-by-layer approach to monitoring your AI infrastructure.

Top-of-rack Cisco N9300 Series Smart Switches and Cisco Live Protect make it easier for data centers to combine robust security, operational simplicity, and scalability—future-proofing data centers for whatever comes next.

Horizon River’s adoption of the Highlight Service Observability Platform was driven by a need for a smarter, more integrated approach to monitoring and reporting its substantial deployment of Cisco Meraki devices across 49 US states.

Extend your network anywhere. Discover how URWB makes it easy to deliver fiber-like connectivity for Wi-Fi, physical security, and more.