If you manage IT for a small business or a handful of clients, your RMM platform is probably the single most powerful piece of software in your environment. It has admin rights on every endpoint it touches, it runs 24/7, and it's reachable from the internet by design. That's exactly why attackers have started treating RMM software as the shortest path into your network — not as a tool to abuse after a breach, but as the breach itself.
The Reddit Alarm Bells Were Right
A wave of urgent hotfix posts recently described a zero-day in N-central allowing pre-authenticated server access — meaning an attacker didn't even need valid credentials to reach the system. That's not a theoretical risk; it's a direct line into whatever N-central manages.
According to The Hacker News, N-able has now issued its fourth N-central hotfix in five weeks, this time for an unauthenticated remote code execution flaw, with conflicting reports about whether it's already being exploited in the wild. Four emergency patches in five weeks isn't a one-off bug — it's a pattern that says the platform's attack surface is actively being probed, and vendors are racing to stay ahead of it.
And it's not isolated to one vendor. According to The Hacker News, rogue ScreenConnect clients have been observed spreading a four-stage VBScript chain to newly connected hosts, essentially worming through remote-access infrastructure the moment a new machine joins. Two of the most widely deployed RMM platforms on the market, hit with serious exploitation activity in the same week. That's a category problem, not a vendor problem.
Why This Hits Small Business IT Harder Than MSPs
MSPs at least have escalation paths, vendor relationships, and (usually) someone watching security advisories. A solo sysadmin or a small business owner running their own IT often doesn't find out about an emergency hotfix until it's already old news — or until something breaks. If you're managing your own environment without dedicated security staff, you need a lightweight, repeatable process for treating RMM patches like the critical infrastructure they are, not like routine software updates.
The Audit Checklist: Harden Your RMM Before It's Used Against You
This isn't about ripping out your remote management tool. It's about auditing how it's configured, patched, and monitored so a vulnerability doesn't become an incident.
- Inventory every RMM agent in your environment. You can't patch what you don't know exists. If you've ever inherited machines from a prior IT provider, this step alone often turns up surprises — see our guide on detecting unauthorized software and rogue agents for a walkthrough.
- Restrict internet-facing access. If your RMM server or console doesn't need to be reachable from the open internet, put it behind a VPN or IP allowlist. Pre-auth exploits only work if the vulnerable service is reachable in the first place.
- Turn on vendor security notifications directly — don't rely on stumbling across a blog post or a forum thread. Subscribe to the vendor's security bulletin RSS or email list for your specific platform.
- Set a 24-48 hour SLA for critical RMM patches. Treat hotfixes for pre-auth or unauthenticated RCE flaws the same way you'd treat a firewall zero-day — patch first, ask questions later.
- Review agent permissions and scope. Does every deployed agent actually need full administrative access, or can some be scoped down? Least privilege applies to your management tools too.
- Audit who has access to the RMM console itself, and enforce MFA on every account with access. A compromised console credential is functionally equivalent to a pre-auth exploit if MFA isn't enforced.
- Log and monitor RMM authentication and deployment events. Unexpected new agent installs or logins from unfamiliar IPs are early warning signs worth alerting on.
If you're unsure whether an agent on your network is legitimate or rogue, our post on unauthorized RMM agent detection walks through the signs to look for. And if you've already had an RMM incident, our emergency playbook for a hacked RMM tool covers the response steps in detail.
The Bigger Lesson: Patch Cadence Has Changed
Four hotfixes in five weeks for one platform, plus active worming behavior on another, tells you the old model — check for updates monthly, patch during a maintenance window — no longer matches the threat. RMM vendors are shipping emergency fixes on compressed timelines because attackers are moving fast. Your patch process has to move at the same speed, or the gap between disclosure and exploitation becomes your exposure window.
Take Action
You don't need a full-time security team to catch these gaps — you need visibility into what's exposed before an attacker finds it first. Oscar Six Security's Radar scan checks your external attack surface, including exposed management consoles and known vulnerable services, for a flat $99 per scan. It's a fast, affordable way to confirm your RMM tooling and other internet-facing systems aren't sitting on a known exploit path. Check out our Solutions page to get started.
Focus Forward. We've Got Your Six.