You have a critical vulnerability in your security system and a patch is available, but deploying it means downtime you can’t afford, or extensive testing you haven’t had time for. Do you risk an outage by rushing an update, or risk a breach by doing nothing?
What if there was a third option?
Virtual patching offers a powerful solution by acting as an instant shield, blocking threats from exploiting the weakness without touching the vulnerable system itself. This gives you the breathing room to plan and deploy a permanent fix properly, all while keeping your operations running and your assets secure.
In this blog we'll explain what virtual patching is, how it functions as a critical security layer, and why it has become an indispensable approach for protecting everything from legacy systems to critical infrastructure against today’s most sophisticated cyber threats.
Virtual patching explained
Virtual patching, sometimes called a "soft patch," is a security method that can rapidly shield software vulnerabilities from being exploited. A virtual patch is an external security control that can mitigate a software vulnerability by filtering or blocking malicious traffic targeting the vulnerable component, without modifying the vulnerable software itself.
Essentially, it applies a security policy or signature at the network level to block exploit attempts before they reach the vulnerable system. This approach provides an immediate, non-intrusive defense, giving your IT and security teams the time they need to apply a permanent fix.
How does virtual patching work?
Virtual patching operates by implementing a security rule, signature, or policy that intercepts and blocks malicious traffic before it can reach a vulnerable application. This process can typically be handled by a network security solution, such as a Next-Generation Firewall (NGFW) or an Intrusion Prevention System (IPS).
The workflow is straightforward and effective:
- A vulnerability is identified: First, a security flaw is discovered in a piece of software. This could be a web application, a server's operating system, or a network device.
- A specific rule is created: Security experts or automated systems analyze the exploit pattern. A specific security rule, signature, or policy can then be created or applied to detect attempts to exploit the vulnerability. A security rule or protection is created or applied as the "virtual patch."
- The security solution blocks the threat: The protection is deployed through a security solution such as a NGFW or IPS. The solution inspects network traffic and can block traffic that matches a known exploit pattern, preventing the attack from reaching the vulnerable system. This external layer of protection helps mitigate the vulnerability until patched software is installed.
4 key benefits of virtual patching
Virtual patching is a strategic advantage that provides speed, efficiency, and operational continuity. It allows organizations to move from a reactive security posture to a proactive one.
Prevent exploits from AI-driven and zero-day threats
Cybercriminals are increasingly using AI to discover and launch attacks at unprecedented speed, often targeting "zero-day" vulnerabilities for which no official patch exists.
Because a virtual patch can be developed and deployed rapidly, it can provide protection against known exploit attempts before a traditional software patch becomes available.
Protect legacy and end-of-life (EOL) systems
Many organizations rely on critical software or hardware that is no longer supported by the original vendor. These legacy and EOL systems present a significant security risk, as new vulnerabilities may no longer receive official security patches or updates.
Reduce downtime with no system reboots
Upgrading patched vulnerabilities usually requires taking systems offline and rebooting them, leading to operational downtime.
Virtual patching, on the other hand, is generally non-intrusive to the protected system. Since the patch is applied through an external security solution, such as an IPS or NGFW, it does not require modifications to the underlying software.
Deploy immediate protection rapidly
When a critical vulnerability is discovered, attackers can mobilize quickly. The ability to deploy a virtual patch in minutes can get you ahead of those threats.
It enables security teams to respond rapidly by applying centrally managed security policies to protect vulnerable assets. This can help reduce the time systems remain exposed to known exploit attempts and lower overall security risk.
How Axis and Palo Alto Networks collaborate to mitigate risks
The strategic importance of virtual patching is best demonstrated in its application to protect critical infrastructure. Recognizing the need for a proactive defense against emerging threats, Axis and Palo Alto Networks have forged a powerful collaboration.
The process begins with Axis proactively sharing information on high-priority vulnerabilities with Palo Alto Networks. This early intelligence enables Palo Alto Networks to develop network-level protections that can help mitigate exploitation before a traditional software update is available.
This initiative is a core part of the Frontier AI Critical Defense Program, where Axis is a founding partner. The program aims to help protect essential services and critical infrastructure against emerging automated and AI-driven cyber threats.
This collaboration unites the deep expertise of Palo Alto Networks in network security with Axis leadership in intelligent edge devices.
In a landscape where AI is shortening the window between vulnerability discovery and exploitation, collaboration is essential.
Sebastian Hultqvist, Manager Platform Solutions, Axis Communications.
"By joining this initiative as a founding partner, we are providing our customers with a proactive safety net. This coordination not only protects our customers today but also provides us with valuable insights to continuously improve our security posture."
Through this partnership, joint customers benefit from a defense-in-depth security model that is both dynamic and resilient. As new threats emerge, this tight collaboration ensures virtual patches can be rapidly developed and deployed to help protect vulnerable systems across the network, from core infrastructure to edge devices.
"Frontier AI has made it possible for cyber threats to find and target software flaws faster than traditional patching can keep up," said Qiang Huang, Vice President Product Management, Palo Alto Networks. "By working with technology leaders like Axis, our program delivers proactive protection to joint customers by blocking threats at the network layer, giving critical infrastructure operators the time they need to safely deploy permanent fixes, while enabling strong business outcomes with next-generation connected devices."
Conclusion
By minimizing the "window of risk" against zero-day threats, virtual patching has become an essential strategy in modern cybersecurity. It helps organizations move from a reactive patching cycle toward a more proactive and controlled security posture.
By providing immediate, non-intrusive protection, virtual patching gives security teams the crucial time needed to test and deploy permanent fixes without interrupting business operations.
In a landscape of ever-accelerating threats, the ability to respond quickly is a true strategic advantage. Adopting virtual patching is a critical step toward building a more secure and resilient organization.
FAQs
Frequently asked questions about virtual patching.
Is virtual patching the same as IPS or NGFW?
No, they are related but not the same. A IPS or NGFW is the security solution that provides the enforcement point, while virtual patching is the security approach used to mitigate a vulnerability without modifying the vulnerable system itself.
How effective is virtual patching against AI-driven threats?
Virtual patching is especially useful against AI-accelerated threats. As attackers use AI to discover and exploit vulnerabilities at machine speed, the window for traditional patching shrinks. Virtual patches can be deployed far faster than code fixes, offering rapid interim protection while a permanent solution is developed.
What is the Frontier AI Critical Defense Program?
The Frontier AI Critical Defense Program is an initiative created by Palo Alto Networks, with Axis Communications as a founding partner. Its mission is to protect critical infrastructure from advanced, AI-accelerated cyber threats by delivering network-level virtual patches. The program combines expertise from security and device leaders to create a proactive defense for essential services.
Does virtual patching replace the need to update AXIS OS?
No, it does not. Virtual patching is a powerful compensating control that can provide rapid protection against exploit attempts, but it should not be considered a substitute for permanent software updates. You should always update to the latest version of AXIS OS as a best practice for long-term security and system health. Virtual patching provides crucial protection in the interim between the discovery of a vulnerability and when a permanent fix is tested and applied.
What is a signature in the context of virtual patching?
In virtual patching, a signature is a rule that identifies network traffic matching a known vulnerability or exploit pattern. A security device uses it to detect and, depending on the configuration, block attempts to exploit that vulnerability without changing the vulnerable software itself.
A signature might look for a specific sequence in a request, unusual protocol behavior, or other indicators of an exploit. It’s typically tied to a particular vulnerability, so it can help protect systems while a permanent software patch is being prepared or deployed.
