The Back Door You Don’t Own: When Your Weakest Link Is Someone Else’s Network
The Sekhmet Scribe | Team Sekhmet
YOU LOCKED THE FRONT DOOR. THEY CAME THROUGH THE SUPPLIER.
Your firewall is configured. Your team is trained. Your patching is current.
And then a software vendor you onboarded three years ago, the one with a quiet login into your systems and a security posture you never actually checked, gets compromised. The attacker doesn’t break into your network. They’re invited in, wearing your supplier’s credentials.
This edition of The Sekhmet Scribe is about third-party and supply chain risk, the exposure that lives outside your perimeter, on a network you don’t control, behind a door you didn’t know was open.
Protect • Empower • Evolve
WHAT’S HOT 🔥
Your Attack Surface Includes Everyone You Trust
Modern businesses run on connection. Cloud platforms, managed services, payroll providers, integrations, contractors, that one indispensable plugin nobody remembers approving. Each one is a thread back into your environment.
Attackers have noticed that the efficient route in is rarely through the well-defended target. It’s through the smaller, softer supplier who has legitimate access and a fraction of the defenses.
Gartner has projected that a large share of organizations would experience a software supply chain attack , a category that was a rounding error a few years ago and is now a board-level concern.
You can have an immaculate house. If the side gate belongs to someone else, you do not fully control who walks through it.
WHAT’S HOT 🔥
One Compromise, Many Victims
The brutal economics of supply chain attacks are simple: breach one widely-used provider, and you reach all of its customers at once.
We have watched single compromised platforms cascade into hundreds of downstream victims, organizations that did nothing wrong individually, except trust a vendor who was carrying the risk for all of them.
This is why “we outsourced it” is not the same as “we’re covered.” You can delegate the function. You cannot delegate the consequence.
The accountability stays in your building, even when the failure didn’t start there.
WHAT’S NOT ❄️
Onboarding vendors without ever assessing their security. Granting standing access far beyond what a supplier actually needs. Assuming a big-name provider must be secure because they’re a big name. Discovering you can’t even list every third party with a route into your systems, and finding out via the breach notification.
Trust is not a security control. Verification is.
THE SEKHMET STANCE
You cannot eliminate third-party risk, connection is how business gets done. But you can see it, measure it and contain it.
At Sekhmet, we help organizations map their real supply chain exposure, hold vendors to a defensible standard, apply least-privilege access so a supplier breach doesn’t become your breach, and prepare for the day a trusted partner is the one who lets the attacker in.
The lioness watches the watering hole as closely as she watches her own den. The danger rarely arrives where you’re already looking.
Know who you trust. Know what they can reach. Limit it before it matters.
Protect • Empower • Evolve
Team Sekhmet