August 10, 2026 #StopRansomware: Gunra Ransomware DC3, FBI, CISA, NSA, USSS, and the Korean National Police Agency (KNPA) have released a joint cybersecurity advisory addressing Gunra ransomware activity. Gunra is a ransomware-as-a-service (RaaS) used by affiliates to target government, critical infrastructure, and other organizations. The advisory provides technical details, indicators of compromise (IOCs), and mitigation guidance to help organizations identify and protect against Gunra ransomware. Read the Full Advisory and IOCs (PDF) →
July 23, 2026 Russian State-Sponsored Actors Exploit Zimbra Vulnerability DC3, NSA, FBI, CISA, and international partners have released a joint cybersecurity advisory detailing an active phishing campaign associated with the Russian state-sponsored threat group LAUNDRY BEAR. The actors are exploiting CVE-2025-66376 in the Zimbra Collaboration Suite. The vulnerability can be triggered when a user views a malicious email, without clicking a link or opening an attachment. Organizations using Zimbra should apply the latest security updates and review the recommended mitigations. Read the Full Advisory (PDF) →
July 10, 2026 Protect Routers Against Russian State-Sponsored Targeting Russian state-sponsored cyber actors continue to exploit vulnerable and poorly configured routers across critical infrastructure sectors. This joint cybersecurity advisory outlines the actors’ techniques and provides practical actions network defenders can take to reduce risk. Key actions include: strengthening SNMP security, disabling legacy protocols, securing credentials, restricting management access, and updating vulnerable network devices. Read the Full Advisory and Mitigations (PDF) →
April 23, 2026 Advisory New Joint Cyber Advisory on Covert Network Threats DC3 and international partners released a joint advisory detailing how nation-state actors are leveraging large-scale networks of compromised devices and how organizations can defend against these evolving threats. Read the Full Advisory (PDF)
December 9, 2025 Advisory Pro-Russia Hacktivists Conduct Opportunistic Attacks Against U.S. and Global Critical Infrastructure Pro-Russia hacktivists are targeting critical infrastructure worldwide. This joint advisory shares updated information from CISA, FBI, NSA, DOE, EPA, and EC3 on incidents affecting operational technology (OT) and industrial control system (ICS) environments. Read the Full Advisory (PDF)
November 19, 2025 Bulletin Bulletproof Defense: Mitigating Bulletproof Hosting Risks CISA’s latest bulletin explains how bulletproof hosting services enable criminal activity and offers actionable defense and reporting recommendations. Read the Full Bulletin (PDF)
November 13, 2025 Advisory #StopRansomware: Akira Ransomware Advisory A joint cybersecurity advisory highlights Akira ransomware activity and provides mitigation guidance to help organizations reduce their risk. Read the Full Advisory (PDF)
August 27, 2025 Advisory Countering Chinese State-Sponsored Actors’ Compromise of Networks Worldwide to Feed Global Espionage System CISA released a joint advisory outlining how Chinese state-sponsored actors are exploiting unpatched network-edge devices to enable global espionage operations. Read the Full Advisory (PDF)
June 30, 2025 Joint Guidance DC3 Partners with CISA, FBI, and NSA to Publish Joint Fact Sheet on Potential Iranian Cyber Activity Joint guidance highlights tactics, techniques, and procedures (TTPs) and recommended mitigations related to potential Iranian state-linked activity targeting U.S. networks and allied infrastructure. Read More