For years, VPN has been a key component enabling employees, technicians and suppliers to remotely access company systems. However, when it is not reviewed regularly, it can also become one of the most critical entry points for an attacker.
The recent CVE-2026-50751 vulnerability, detected in Check Point VPN solutions configured with the obsolete IKEv1 protocol, has once again highlighted a common problem: many companies maintain legacy remote access, outdated configurations or firewalls without an in-depth security review.
The problem is not just a specific brand, manufacturer or vulnerability. The real risk lies in assuming that a VPN is still secure simply because “it has always worked”. In cybersecurity, what is not reviewed eventually becomes exposure.
In this article, we analyse why a secure business VPN requires much more than a password, what risks obsolete protocols create and what measures any company should apply to protect its remote access.
Why a VPN vulnerability can be so critical for a business
A VPN is not just another application within the IT environment. It is a direct entry point into the corporate network, internal servers, shared resources, management applications and, in many cases, the organisation’s most sensitive systems.
When an attacker manages to exploit a vulnerability in remote access, the impact can be much greater than a failure on an isolated device. VPN is usually exposed to the Internet and, if it is not properly protected, it can enable lateral movement within the network.
In the case of CVE-2026-50751, the flaw affected environments configured with IKEv1, a protocol already considered legacy. According to the information published by the manufacturer, exploitation could allow a VPN session to be established without a valid password under certain conditions.
For a company, this sends a very clear message: remote access cannot be configured once and then forgotten for years. It needs maintenance, updates, log review, user control and security policies aligned with the real state of current threats.
The underlying problem: legacy protocols and outdated configurations
Many security incidents do not start with new technology, but with an old configuration that nobody has reviewed again. Legacy protocols, outdated VPN clients, users who should no longer have access or overly permissive rules are common examples.
In business environments, VPN is often initially configured to solve an urgent need: remote working, remote support, inter-site connectivity or supplier access. Over time, that configuration remains in place, but the context changes.
The company grows, new cloud services are added, users change, systems are updated and new threats emerge. If the VPN does not evolve at the same pace, it becomes a component that is misaligned with the company’s real security needs.
Some examples of risk include:
- Old protocols such as IKEv1 when more secure alternatives already exist.
- Legacy VPN clients that remain enabled for compatibility reasons.
- Access for former employees, suppliers or technical accounts that has not been reviewed.
- Firewalls running old or unsupported versions.
- Lack of multi-factor authentication for remote access.
- No alerts for suspicious or out-of-hours connections.
A well-managed perimeter security strategy must take all these points into account, not just the initial firewall installation.
Secure business VPN: what your company should review this week
When a critical VPN vulnerability appears, many companies wonder whether they are affected. The answer is not always immediate, because it depends on the manufacturer, version, configuration, active protocols and type of remote access enabled.
That is why, beyond checking whether Check Point or any other specific vendor is being used, it is advisable to carry out a general review of remote access. This review helps detect accumulated risks and reduce exposure before it turns into an incident.
1. Identify which VPN solutions are active
The first step is to know which systems provide remote access to the corporate network. There is not always just one VPN. There may be firewalls, appliances, cloud services, site-to-site connections, supplier tunnels or temporary accesses that have remained active.
The company should have a clear inventory that answers these questions:
- Which devices publish VPN access.
- Which firmware or software versions they use.
- Which protocols are enabled.
- Which users or groups can connect.
- Which internal resources are accessible after connection.
Without an inventory, there is no control. And without control, any security measure is based on assumptions.
2. Review obsolete protocols
A secure business VPN should avoid legacy protocols whenever possible. In the case of IKEv1, many organisations keep it active for compatibility with old clients or historical configurations.
The problem is that compatibility cannot take priority over security. If a protocol is no longer recommended, its removal must be planned or, at the very least, its use must be tightly restricted.
The review should check whether it is possible to migrate to more up-to-date protocols, require machine certificates, remove legacy clients and apply manufacturer-recommended configurations.
3. Apply patches without waiting for the monthly cycle
When a vulnerability is being actively exploited, waiting for the monthly maintenance window may be too late. Exploitation windows are becoming shorter and attackers automate the search for vulnerable systems exposed to the Internet.
Companies need to distinguish between a routine update and an urgent fix. A critical vulnerability in VPN, firewall or remote access must be treated as an operational priority.
This does not mean updating without control. It means having a clear procedure to assess risk, review compatibility, apply the patch and verify that the service continues to operate correctly.
4. Enable multi-factor authentication
A password is no longer enough to protect remote access. Although a specific vulnerability may bypass part of the authentication process, multi-factor authentication remains an essential layer to reduce risk under normal conditions.
MFA helps protect against stolen credentials, reused passwords, brute-force attacks and unauthorised access. It should be applied especially to privileged users, external technicians and any profile with access to critical systems.
In a secure remote access strategy, MFA should not be optional. It must be part of the company’s security policy.
5. Review users, groups and permissions
A poorly maintained VPN does not only fail because of technology. It also fails because of accumulated permissions. Users who have changed department, former employee accounts, suppliers with permanent access or overly broad groups are frequent risks.
The review should include:
- Users with active VPN access.
- Accounts with no recent activity.
- Permissions by group or department.
- Access for external suppliers.
- Administrative accounts with remote connection.
The goal is to apply the principle of least privilege: each user should access only what they need, for the time required and with traceability.
Monitoring makes the difference between detecting and discovering too late
Many companies discover unauthorised access when the damage has already been done. Ransomware encryption, a data leak or a system outage are often the visible phase of an attack that started days or weeks earlier.
In VPN-related incidents, logs can show relevant signs: connections from unusual locations, out-of-hours access, multiple failed attempts, configuration changes or sessions from unusual IP addresses.
The problem is that these records are only useful if someone reviews them, if alerts exist and if the company has response capacity. 24/7 IT systems monitoring helps detect anomalies before they escalate and helps prioritise actions when a critical vulnerability appears.
Good monitoring does not replace patches, MFA or segmentation. But it does improve the ability to detect abnormal behaviour and respond more quickly.
Segmenting the network: a VPN should not open everything
One of the most common mistakes is allowing a user, once connected via VPN, to have excessive visibility over the internal network. This multiplies the impact if an account is compromised or if a vulnerability allows an unauthorised session to be established.
A secure business VPN must be supported by segmentation. Not all users need access to all servers, all VLANs or all internal applications.
Segmentation limits the scope of an incident. If an attacker manages to get in, they should not be able to move freely across the entire network. This is especially important in companies with critical servers, industrial environments, sensitive data or business management applications.
The combination of firewall, access rules, user groups, VLANs, privilege control and monitoring reduces the potential impact of any unauthorised access.
What to do if your company uses VPN and does not know whether it is exposed
Not all companies have complete visibility over their infrastructure. In many cases, the firewall was installed years ago, documentation is not up to date or there is no periodic configuration review.
If your company uses VPN and is not clear about its level of exposure, it is advisable to act methodically. The aim is not to create alarm, but to review critical points with technical criteria.
A reasonable roadmap would be:
- Identify manufacturer, model, version and active VPN services.
- Check whether the manufacturer has issued recent security advisories.
- Verify whether legacy protocols are enabled.
- Review users, groups and supplier access.
- Confirm whether MFA is active for all relevant profiles.
- Apply recommended patches or hotfixes.
- Analyse recent logs for anomalous activity.
- Document changes and establish a periodic review procedure.
This approach allows the company to move from a reactive posture to preventive remote access management.
VPN is not just a technical issue: it is business continuity
When a VPN fails or is compromised, the impact is not limited to the IT department. It can affect remote working, remote support, inter-site connectivity, access to internal systems and operational continuity.
That is why VPN management must be part of a broader cybersecurity and continuity strategy. It is not enough for remote access to work. It must be secure, traceable, up to date and consistent with the real needs of the business.
In companies with a high level of technological dependency, VPN must be reviewed together with the firewall, backups, endpoint security, network segmentation, identity management and incident response procedures.
Having a 24×7 IT maintenance service helps keep these elements under control and respond better when a critical vulnerability appears.
How Inmove IT Solutions can help
At Inmove IT Solutions, we help companies review, maintain and protect their communications infrastructure, firewall, VPN and remote access. Our approach combines perimeter security, maintenance, monitoring and specialised technical support.
The goal is not to apply patches in isolation, but to understand how the network is designed, what access exists, what risks are present and which measures can improve security without compromising daily operations.
We can help you review VPN configurations, detect obsolete protocols, check access policies, improve segmentation, reinforce the use of MFA and establish update and monitoring procedures.
We can also integrate this review into a broader antivirus, antispam and cybersecurity strategy for businesses, especially if your organisation needs a more complete view of its exposure.
Conclusion: a secure VPN needs continuous review
The CVE-2026-50751 vulnerability is a clear reminder: remote access is critical and cannot be maintained with legacy configurations without review. A VPN that worked correctly five years ago may no longer be enough against today’s threats.
Companies must review their protocols, apply critical patches, remove obsolete configurations, enable MFA, control users and monitor access. It is not just about protecting a connection, but about protecting the entry point to the entire corporate network.
A secure business VPN does not depend on a single measure. It depends on continuous, documented management adapted to the real risk of each organisation.
If your company uses VPN, firewall or remote access for employees and suppliers, this may be a good time to review whether the current configuration is still secure. At Inmove IT Solutions, we can help you analyse the state of your remote access and prioritise the most important measures according to your environment.
Do you want to strengthen the security of your business VPN and better protect your organisation’s remote access? Contact Inmove IT Solutions and we will help you define a solution adapted to your infrastructure, users and continuity needs.
Frequently asked questions about secure business VPN
These questions answer common doubts from companies that use VPN for remote working, remote support or inter-site connectivity.
Is VPN still secure for remote working?
Yes, a VPN can still be secure if it is properly configured, updated and protected with multi-factor authentication. The problem appears when obsolete protocols, unreviewed users or old firewall versions are maintained.
What is the risk of using old protocols such as IKEv1?
Old protocols may have security limitations and be exposed to vulnerabilities that attackers know and exploit. Whenever possible, it is advisable to migrate to more up-to-date protocols and follow the manufacturer’s recommendations.
How often should VPN configuration be reviewed?
At a minimum, it should be reviewed periodically and whenever there are significant changes: new users, firewall changes, new sites, remote working, external suppliers or the publication of critical vulnerabilities.
Is MFA mandatory in a business VPN?
From a security perspective, it should be considered essential. MFA reduces the risk associated with stolen credentials or weak passwords and adds an additional layer of protection to remote access.
Which logs should be reviewed when there is a VPN vulnerability alert?
It is advisable to review recent connections, source IPs, unusual schedules, failed attempts, users with unusual access, configuration changes and subsequent activity within the network. In actively exploited vulnerabilities, it is also advisable to review the period before the patch was published.
Is a firewall update enough to be protected?
Applying the patch is essential, but it is not always enough. It is also advisable to check whether there has been previous suspicious activity, remove obsolete configurations, verify permissions and reinforce monitoring.
