A security patch, also known as a security fix, is an update released by the vendor of software, an operating system or an IT device to correct a vulnerability discovered after the product has been put into use. Its main purpose is to prevent a known flaw from being exploited by cybercriminals.
When a vulnerability is identified, it can become an entry point into a company’s IT systems. Depending on the nature of the flaw, an attacker may be able to access sensitive information, take control of a device, install malware or prepare a ransomware attack.
Vendors therefore release patches regularly to fix these weaknesses. Once a patch becomes available, it is important to install it quickly. A publicly disclosed vulnerability can rapidly attract the attention of cybercriminals, who will look for systems where the patch has not yet been applied.
For a business, however, installing patches is not simply a matter of clicking “update”. IT teams must identify the affected systems, assess the severity of the vulnerabilities, test certain patches and make sure they are properly deployed across all relevant devices.
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This process is known as Patch Management. It helps keep systems up to date and reduces the period during which a vulnerability can be exploited.
Effective patch management is therefore one of the fundamental measures of cybersecurity: the longer a critical vulnerability remains unpatched, the greater the risk it poses to the business.