US Nuclear Weapons Agency Breached by Zero-Day Attack
- jchouinard9
- Aug 21
- 2 min read
The U.S. National Nuclear Security Administration (NNSA), the agency responsible for safeguarding the nation’s nuclear arsenal, was recently breached in a wave of sophisticated cyberattacks exploiting zero-day vulnerabilities in Microsoft SharePoint.
Attackers, believed to be linked to Chinese state-sponsored groups, leveraged flaws to gain remote access and steal sensitive data from affected systems. The Department of Energy reports that no classified information was compromised, but the incident highlights the speed and severity of modern exploits, and the high-value targets they pursue.
Prevent a Zero-Day Attack: Upgrade to Windows 11 Now!
On October 14, 2025, Windows 10 will officially reach End-of-Life (EOL), and that date will instantly become a global zero-day event. After EOL, no new security patches will be issued, leaving every remaining Windows 10 system open to exploitation.
Much like the SharePoint zero-day, attackers won’t waste any time. Once vulnerabilities are found in unsupported systems, they’ll spread quickly, putting your data, operations, and reputation at risk.
The Danger to Small Businesses
Small and mid-sized businesses are prime targets because many still run outdated systems and lack enterprise-level defenses. One compromised device can lead to network-wide breaches, downtime, compliance failures, and financial losses.
TMGC’s Take
If an agency as well-resourced as the NNSA can be breached through an unpatched zero-day, your business running end-of-life systems is even more vulnerable. Windows 10 EOL is a cybersecurity deadline.
Don’t Wait!
Upgrading your systems now ensures you won’t be scrambling after the fact. TMGC can help you:
Assess your risk before Windows 10 EOL hits
Build a secure, upgrade-ready IT roadmap
Implement hardened, supported environments for long-term stability
Avoid a Zero Day Attack!
Your business deserves protection before attackers have the upper hand.
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