Your invoices, bank statements, pay slips, supplier data… These documents pass through your company every day. They are also exactly the data that cybercriminals are looking to steal, encrypt or resell. How can you protect yourself? And how do you choose a management tool that is not itself a security vulnerability?

In 2025, phishing accounted for 43% of incidents reported by VSEs and SMEs, according to the Cybermalveillance.gouv.fr 2025 national barometer. Over the same period, the ANSSI handled 3,586 security events and 1,366 confirmed incidents in France (Panorama de la cybermenace 2025, ANSSI, March 2026). And according to several converging studies, 55% to 60% of VSEs that are victims of a serious cyber attack go out of business within 18 months.

VSEs and SMEs are not spared – on the contrary. Cybercriminals target them precisely because they are often less well protected than large groups, while processing data that is just as sensitive: bank details, customer data, margins, supplier contracts and salaries.

In this article, we take a look at the real threats, the best practices to put in place, and what a tool like Azopio can do to secure your financial data.

1. Why your accounting data is a priority target

A common misconception persists among many managers of very small businesses: “we’re too small to be of interest to hackers”. This is not true – and this belief is precisely what makes these structures vulnerable.

Accounting data has direct and immediate value for cybercriminals:

• Bank details used for fraudulent transfers
• Supplier data used to forge invoice emails (fake supplier fraud)
• Customer data can be resold or used for other attacks
• Access to the accounts gives a complete picture of the company’s financial health – useful for calibrating a ransom demand

Sources: Cybermalveillance.gouv.fr 2025 Barometer – 43% of VSE/SME incidents involve phishing. ANSSI Panorama 2025 – SMEs account for 48% of ransomware victims. 43% of victims have seen their activity stopped for more than a day (CESIN 2025 barometer).

With the widespread introduction of electronic invoicing in 2026-2027, the flow of financial data between companies will intensify. This provides additional opportunities for malicious actors to intercept or manipulate information.

2. The 3 main threats to your financial data

Phishing and fake supplier fraud

It’s the number one threat: 43% of incidents reported by VSEs and SMEs are phishing attacks (Cybermalveillance Barometer.gouv.fr 2025). The principle: a fraudulent email perfectly imitates a supplier, a bank or your accountant, to get you to click, open an attachment or validate a transfer.

With generative AI, these emails are now written without a single mistake, in the exact tone of your usual contacts. Human detection alone is no longer enough.

In practical accounting terms: you receive an invoice from a regular supplier with a new RIB. You pay. The money goes out. Then the real invoice arrives.

Ransomware

Ransomware infiltrates your system – often via an attachment or a stolen password – encrypts all your files and displays a ransom demand. Your accounts, invoices, HR documents: everything becomes inaccessible in a matter of seconds.

Modern variants combine encryption and exfiltration: attackers threaten not only to block your data, but also to publish it. This double pressure is particularly effective against organisations concerned about their reputation and RGPD compliance.

In practice: according to ANSSI (Panorama de la cybermenace 2025), SMEs, VSEs and ETIs account for 48% of ransomware victims – the smallest structures remaining the most exposed due to a lack of adequate protection.

Account compromise and data leaks

A reused password, an unclosed session, an old access that has not been revoked: these are all silent entry points. A cybercriminal who gains access to your management tool can consult, copy or modify financial data for weeks without being detected.

In practice: an ex-employee whose account has not been deactivated can access your data months after leaving. This is one of the most common situations encountered during security audits.

3. Best practices for protecting your financial data

Enable multi-factor authentication (MFA) everywhere

MFA adds a second check after your password. According to data published by Microsoft, it blocks 99.9% of account compromise attacks. It’s the most cost-effective measure available, and it takes just a few minutes to activate.

Priority should be given to: email, management and accounting tools, online banking, document storage.

Manage access rights finely

Your sales representative doesn’t need to see payslips. Your outsourced accountant doesn’t need access to HR data. The more accesses are segmented, the more a compromise remains localised. Every time an employee leaves, their access should be revoked immediately – without exception.

Do not store sensitive documents in unsecured tools

Mailboxes, personal drives, USB sticks, unprotected shared folders: these practices directly expose your data. A dedicated EDM (Electronic Document Management) tool, with encryption and access traceability, is a much more reliable barrier.

Regular team training

90% of successful cyber attacks exploit human error. Regular phishing simulations reduce the rate of malicious clicks by 70% in trained teams. Technology alone is not enough.

Backing up and testing backups

An untested backup is a useless backup. The rule: at least one offline copy, disconnected from the network and inaccessible to ransomware. And a restoration test at least once every three months to check that the data is recoverable.

Choosing certified and RGPD-compliant tools

The security of your data also depends on the security of your service providers. Management software must be able to demonstrate concrete security measures, hosting in Europe and documented RGPD compliance. This is a selection criterion in its own right.

4. What Azopio does to secure your data

ISO 27001 certification

This is the benchmark international certification for information security. It covers internal organisation, risk management, access control, business continuity and incident management. Azopio is ISO 27001 certified by an independent body, with regular renewal audits.

To find out what this certification actually involves: blog.azopio.com/what-is-certification-iso-27001/

Hosting in France, by OVH

All Azopio data is hosted on OVH servers (1st European cloud company), whose datacentres are located in France. Data subject to French and European law, no exposure to extraterritorial legislation. Highly monitored infrastructure: nominative RFID access, 24-hour video surveillance, redundant power supply, 48-hour generators, APSAD R4-certified fire protection.

TLS encryption on all communications

All data exchanged between your device and the Azopio servers is encrypted using TLS (Transport Layer Security). Neither in transit nor at rest does your data circulate unencrypted.

Two-factor authentication (2FA)

Azopio offers 2FA on all accounts. Even if a password is compromised, access remains blocked without the second check. Simple to activate, extremely effective.

Rights management and access traceability

Each user has configurable rights according to their role. Access can be traced: who consulted what, when. In the event of an incident or audit, this traceability is invaluable.

RGPD compliance

The purpose of processing is documented, the rights of individuals are respected, data is hosted in the European Union and subcontractors are governed by compliant contracts. Data protection is not a box to tick: it’s an architecture.

To find out more about Azopio’s RGPD compliance: blog.azopio.com/rgpd-pre-accounting-how-azopio-guarantees-financial-data-compliance/

Summary: best practices vs. what Azopio covers

Good practice	What Azopio covers
MFA / dual authentication	2FA available on all accounts
Secure hosting in France	OVH France servers, 24-hour certified datacenter
Data encryption	TLS on all communications (HTTPS)
Managing access rights	User-configurable roles and permissions
RGPD compliance	Documented RGPD policy, data hosted in the EU
Independent safety certification	ISO 27001 certification (audited by a third-party organisation)

5. Safety and productivity: the two are not mutually exclusive

We sometimes hear that safety constraints slow down work. This is true when they are poorly thought out. A well-designed solution integrates security without friction: 2FA takes 5 seconds, access rights are configured once, and encryption is totally transparent to the user.

What really slows things down is a cyber attack. Business paralysed for several days, data corrupted, customers alerted to a leak, an RGPD procedure triggered, reputation damaged. The cost of an incident far outweighs the effort to prevent it.

By entrusting the management of your financial data to an ISO 27001-certified tool, hosted in France and RGPD-compliant, you won’t have to choose between efficiency and security.

Would you like to try out Azopio? Request a demo or create your account in 2 minutes: azopio.com/en/demo/