Are Former Vendors Still in Your Systems?
Most businesses don’t have a formal process in place to cut ties with vendors once a contract ends. Former IT providers, software consultants, and third-party vendors often retain access to your network, cloud platforms, and sensitive data long after the relationship is over. The Verizon Data Breach Investigations Report shows that third-party involvement appears in a significant percentage of breaches every year, and compromised credentials remain the number one entry point.
At Ascend Technology Group in Omaha, we’ve onboarded new clients and discovered former vendors with full admin access to firewalls, Microsoft 365 accounts, and backup systems still active. Nobody had removed the access. Nobody had even checked. That’s how quickly this becomes a serious security issue.
What Is Third-Party Vendor Risk Management?
Third-party vendor risk management is the process of identifying, assessing, and controlling the security risks that arise when external parties are given access to your systems. This includes IT providers, software vendors, cloud service partners, consultants, and contractors who have access to your network or data.
For small and mid-sized businesses, vendor risk management is not just a compliance checkbox. It’s the difference between a secured environment and an open door left unattended. Every vendor granted access creates a potential entry point for attackers — whether through stolen credentials, outdated permissions, or a breach on the vendor’s side that spreads to yours.
Why Do Former Vendors Still Have Access?
Most businesses lack a formal offboarding process for vendors. When contracts end or providers change, the focus is typically on onboarding the new vendor. Rarely does anyone audit what the previous vendor still has access to.
Here’s what we commonly find during initial security assessments:
- Active admin accounts for Microsoft 365 or other cloud platforms belonging to vendors who left months ago
- VPN credentials that were never rotated after switching providers
- Shared passwords for firewalls, routers, and switches that haven’t been changed in years
- Remote monitoring tools from previous MSPs still installed across systems
- API keys and service accounts tied to third-party integrations no one remembers configuring
In one case, a client who transitioned to us still had their previous MSP’s remote access agent installed on all 47 endpoints. The old contract had ended eight months earlier. Full administrative access remained active.
This situation is more common than most businesses realize.
How to Audit Vendor Access
A vendor access audit involves creating a complete inventory of every third party that currently has — or previously had — access to your systems, platforms, or data. This requires reviewing cloud admin consoles, firewall configurations, VPN user lists, remote access tools, and service accounts individually.
Step 1: Create a Vendor Inventory
Document all current and former vendors, consultants, and contractors who have interacted with your IT environment in the past 24 months. Include IT providers, software vendors, web developers, phone system providers, and any party with remote access.
Step 2: Map System Access
For each vendor, identify exactly what systems they can access. Review admin roles in Microsoft 365, Google Workspace, AWS, Azure, firewall credentials, VPN accounts, remote monitoring tools, and shared storage permissions.
Step 3: Revoke Unnecessary Access
Immediately remove access for vendors without an active contract. If the relationship resumes later, provision new credentials with appropriate scope.
Step 4: Apply Least Privilege
Active vendors should only have access to the systems required for their role. A phone system provider does not need domain admin privileges. A web developer does not need backup infrastructure access. Limit permissions to the minimum required.
Step 5: Schedule Recurring Reviews
Vendor access audits should be conducted quarterly. Document who has access, who approved it, and when it was last reviewed.
What Should a Vendor Offboarding Process Include?
A proper offboarding process should trigger whenever a contract ends or a provider is replaced. It should include:
- Revoking all user accounts and credentials
- Uninstalling remote access or monitoring tools
- Rotating shared passwords on accessed systems
- Removing API keys and integration tokens
- Documenting completion through a formal checklist
Vendor offboarding is not optional. It’s equivalent to changing locks when an employee leaves. You would not allow a former employee to keep their office key. The same applies to administrative credentials.
At Ascend, we conduct a full access audit at the beginning of every client relationship. If a client transitions away from us, we provide a complete handoff document detailing every system accessed and credential used to ensure a clean transition.
How Vendor Risk Connects to Compliance
If your business falls under regulatory requirements, vendor access management is mandatory.
- HIPAA: Requires Business Associate Agreements (BAAs) for vendors handling protected health information
- PCI DSS: Requires tracking third-party access to cardholder data environments
- CMMC: Requires documented access controls for external entities
- SOC 2: Reviews third-party access policies and audit practices
Even businesses outside these frameworks are seeing cyber insurance carriers request documentation of third-party access controls during underwriting. Strong vendor access management can simplify renewals and potentially reduce premiums.
What Happens When Vendor Access Goes Wrong
Failure to manage vendor access can result in serious consequences:
- Stolen credentials: Compromised vendor accounts used to access internal systems
- Ransomware through remote tools: An outdated RMM agent becomes an entry point
- Compliance failure: Active unauthorized accounts discovered during audit
- Data exfiltration: Former contractors accessing sensitive data through active VPN credentials
These scenarios are not hypothetical. The difference between organizations that experience breaches and those that avoid them often comes down to active vendor access management.
Frequently Asked Questions
How often should we audit vendor access?
At minimum, quarterly. Conduct immediate reviews when contracts begin, end, or change scope. Automated alerts for new admin accounts can provide additional oversight between audits.
What is the first step when switching IT providers?
Request a full access inventory from the outgoing provider, including accounts, credentials, remote tools, and integrations. Revoke or rotate access during the transition process.
Should vendors have administrative access?
Only when absolutely necessary and scoped to specific systems. Apply the principle of least privilege and document justification for elevated permissions.
Do we need a formal vendor management policy?
Yes. Even a concise documented policy outlining how access is provisioned, reviewed, and revoked creates accountability and consistency.
How should ongoing vendor access be managed?
Document scope clearly, review quarterly, tie access to active contracts, require MFA, and use time-limited credentials where possible.
What tools help manage vendor access?
Privileged Access Management (PAM) tools, Identity and Access Management (IAM) systems, and built-in admin consoles in Microsoft 365 or Google Workspace are effective starting points.
Does vendor access affect cyber insurance?
Yes. Underwriters assess third-party risk management practices. Documented audits and offboarding processes reduce risk exposure.
Can Ascend help audit vendor access?
Yes. We conduct full access audits for new clients, identify unnecessary accounts and tools, revoke inappropriate access, and implement recurring review processes. Contact us for a consultation.
