Critical Infrastructure Security Major U.S. telecom companies form new cybersecurity information sharing group May 20, 2026 Share By SC Staff (Adobe Stock) Major U.S. telecommunications companies have launched a new information sharing group to enhance their collective defense against escalating cyber threats, including AI-powered attacks and state-sponsored espionage targeting communication networks. The Communications Cybersecurity Information Sharing and Analysis Center, or C2 ISAC, will provide a private platform for member companies to exchange critical intelligence on emerging vulnerabilities and threat actor tactics, as reported by Channeldive. The C2 ISAC, founded by AT&T, Charter, Comcast, Cox, Lumen, T-Mobile, Verizon, and Zayo, aims to foster more candid information exchange than previously possible within government-affiliated groups. This initiative comes in response to increasing threats, such as China's Salt Typhoon espionage operation, and a perceived pullback of government cybersecurity partnerships. The group's private nature is intended to encourage the sharing of sensitive, early-stage threat data that might be withheld in a government-involved setting. While the existing Communications ISAC (Comms ISAC) will continue to operate, focusing on broader hazards, the C2 ISAC will concentrate exclusively on cybersecurity. This new collaboration is seen as complementary, allowing telecom companies to share intelligence more freely and build a unified defense against complex threats that no single entity can combat alone. Source: Channeldive SC Staff Related Government security Poland directs officials to cease Signal use amid cyberattack concerns SC Staff May 20, 2026 The cyberattacks did not compromise Signal's encryption but instead relied on social engineering and account takeover tactics. Government security CISA contractor’s public GitHub repo exposed sensitive government credentials SC Staff May 19, 2026 The repository, named "Private-CISA" and maintained by contractor Nightwing, exposed AWS administrative credentials, access keys, tokens, plaintext usernames and passwords for internal CISA systems, and SSH keys. Supply chain GitHub Actions workflow compromised to steal CI/CD credentials SC Staff May 19, 2026 The attack involves an "imposter commit" strategy where all existing tags in the repository were altered to point to a malicious commit. Related Events Cybercast State of Critical Infrastructure Security Thu Jun 11 Cybercast From code to cloud: Stopping attacks in the software supply chain On-Demand Event Virtual Conference Securing the Backbone: Strategies to Counter Cyber Threats to Critical Infrastructure in the Public Sector On-Demand Event Get daily email updates SC Media's daily must-read of the most current and pressing daily news Business Email By clicking the Subscribe button below, you agree to SC Media Terms of Use and Privacy Policy . Subscribe You can skip this ad in 5 seconds