The recent “SignalGate” incident, where classified military information was leaked through a compromised Signal chat, should serve as a wake-up call for Managed Service Providers (MSPs). This breach wasn’t just about one failure—it exposed systemic issues that all MSPs should pay attention to. In a recent episode of The CyberCall, Andy Sauer, CEO of CMMC-certified MSP Sentinel Blue, and Joy, a compliance expert from Summit Seven, broke down the implications of the incident and what MSPs can learn from it.
One of the key failures in the SignalGate breach was access control. An unauthorized person was accidentally added to a sensitive chat, highlighting the importance of strict access policies, regular audits, and clear verification processes. Another major vulnerability was the use of personal mobile devices for sensitive communication. As Andy pointed out, personal devices are often the weakest link, making mobile device management (MDM) and bring-your-own-device (BYOD) policies essential. The experts also stressed the importance of situational awareness—knowing exactly who’s involved in a conversation, whether in a chat app or a CC’d email chain. Finally, the incident reinforced that the choice of communication platform matters. Not every app is appropriate for every situation, especially when sensitive data is involved.
The conversation also touched on CMMC (Cybersecurity Maturity Model Certification), which presents both a challenge and an opportunity for MSPs looking to serve the defense sector. According to Andy, CMMC isn’t just a checklist—it requires a deep understanding of frameworks like NIST 800-171 and the regulations around Controlled Unclassified Information (CUI). MSPs need more than just technical knowledge; they must build strong processes, invest in the right tools, and make strategic business decisions, including specialization, pricing, and client selection. CMMC readiness requires significant financial and operational commitment, but it can also differentiate an MSP in a crowded market.
Across the board, the speakers emphasized that proper documentation, careful client evaluation, and clearly communicating the value of your services are essential best practices. The SignalGate breach and the ongoing CMMC journey both illustrate that cybersecurity isn’t a box to check—it’s a long-term investment. MSPs that take these lessons seriously can not only protect their clients more effectively but also strengthen their own businesses for the future.
