Software updates are important for security because most of them close known vulnerabilities that attackers actively exploit. Once a vendor publishes a patch, the flaw becomes public knowledge, so unpatched systems are easy targets. The 2017 WannaCry and Equifax incidents both exploited flaws for which fixes had been released weeks or months earlier.
Key Takeaways
- A patch is a change to existing software, often made to fix bugs and security vulnerabilities; larger bundles are called software updates or service packs.
- WannaCry (May 2017) spread through a Windows flaw Microsoft had patched in March 2017 with bulletin MS17-010.
- Equifax was breached through Apache Struts in May 2017, about two months after a fix was released on March 7, 2017.
- Microsoft releases security fixes on Patch Tuesday, the second Tuesday of each month.
- Turning on automatic updates is the single easiest step for home users, according to CISA.
What will you do when you see some pop-up messages and little icons that appear in the IT systems? Usually they mean that a new software update is available for your device to download and install. Many people find these notifications, and the time it takes to install updates, disruptive and unimportant. The fact is that the people avoid such kind of notifications for several reasons, like, ‘Do I actually require installing software update?’, ‘My system is working properly, ‘I don’t have time to reboot my IT system, ‘I do not want to install this update!’ etc. However, installing software updates is one of the most significant things you may perform with your PC. If you do not update your software, your PC is far more exposed to malware and hijacking, because attackers deliberately target flaws that have already been fixed in newer versions. Anyways you should know about software updates first.
A software update, also known as a ‘Service Pack’ or a ‘Patch’, is a piece of software introduced by the vendors of software. Software updates mainly exist to patch security vulnerabilities in existing products. Occasionally, Software updates contain product enhancement and bug fixes. These kinds of updates are generally installed over the present installation and do not need re-installation or uninstallation of the software.
A software update may contain:
- Product Enhancements and Bug Fixes: Many software updates are developed mainly to patch security holes in programs. Updates that also include product enhancements and bug fixes can improve a program’s stability and performance.
- Security Vulnerability Fixes: A large share of operating system and software updates exist to fix security vulnerabilities; Microsoft, for example, ships security fixes every month on Patch Tuesday. With a security hole, a software program may allow very bad things to happen to the IT system.
Why Software Updates are very important for the security of all the IT systems?
- To get the great performance from your system and also to keep protected against malicious threats and cyber-attacks, it is very essential that you must not avoid any critical software updates. Using an outdated or unpatched system is like living in a home without locks on the doors, inviting unwanted intruders. When you skip software updates on your PC, you choose to leave your system open to viruses and other malware.
- Downloading and installing updates can sometimes be slow or inconvenient, but the protection they provide is worth it. The good thing is that you do not need to manually install and download most updates for each piece of software. A majority of programs and Operating systems installed on your system may do the work for you with no intervention.
- Software changes quickly. A program you buy or download may already have newer updates available by the time you install it, whether it is antivirus software or an office suite, so it is worth checking for updates right after installation.
Patch management is an area of systems management that involves acquiring, testing, and installing multiple patches to an administered computer system. The Patch Management is one of the most important tasks of system administrators and IT managers. Software updates and patches must be provided timely and managed consistently.
Therefore, software updates for the security of all the IT systems is very important. If you do not update software, there can be bad results. All software updates can provide protection towards a variety of Security vulnerabilities. Most people will readily update the anti-virus software; we all know that anti-virus software can prevent a virus from deleting our data or taking control of our PC. However, antivirus software mainly scans incoming emails, downloads and files for known threats; it does not repair the underlying security holes in the operating system and apps, which only updates can close.
Depending on the severity of the security hole, an attacker could take total control of your system. So, software updates play a vital role for the security of all the IT systems.
What Is the Difference Between a Patch, an Update and a Service Pack?
A patch is data that modifies an existing program or file, often to fix bugs and security vulnerabilities, according to Wikipedia’s article on patches. The word usually implies a small change; larger releases are called software updates or service packs, a term Windows NT and its successors used for bigger cumulative releases.
| Term | What it usually means | Should you install it? |
|---|---|---|
| Security patch | A targeted fix for a specific vulnerability | Yes, as soon as possible |
| Bug-fix update | Fixes crashes and errors, sometimes improves performance | Yes |
| Feature update | Adds or changes features, often larger in size | Yes, after a quick check for known problems on critical machines |
| Service pack | A large cumulative bundle of earlier fixes | Yes, if your product still uses them |
What Happens When Updates Are Skipped? Two Real Examples
WannaCry Ransomware Attack
The WannaCry ransomware attack began on 12 May 2017 and affected more than 300,000 computers in 150 countries, according to Wikipedia. WannaCry spread through EternalBlue, an exploit of Microsoft’s implementation of the Server Message Block (SMB) protocol. Microsoft had already released security bulletin MS17-010 on 14 March 2017, which addressed the vulnerability. Up to 70,000 devices in the UK’s National Health Service may have been affected, and some ambulances were diverted. Learn more about this kind of threat in our guide to common types of ransomware.
Equifax Data Breach
The 2017 Equifax data breach exploited a vulnerability in Apache Struts, a web application framework. A key security patch for Apache Struts was released on March 7, 2017, but the intrusion began on May 12, 2017 and went undetected until July 29, 2017. Records of 147.9 million Americans, along with 15.2 million British citizens and about 19,000 Canadians, were compromised. The settlement included $300 million for a victim compensation fund, $175 million to states and territories and $100 million in fines to the CFPB.
When Do Software Updates Come Out?
Many vendors release fixes on a predictable schedule. Patch Tuesday is the second Tuesday of each month, when Microsoft releases its regular security updates starting at 10:00 a.m. Pacific Time; Microsoft formalized the practice in October 2003. Other companies, such as SAP with its Security Patch Day, align their schedules with it. Urgent fixes for actively exploited flaws can also arrive outside the regular cycle, which is why automatic updates matter.
How Do Organizations Decide Which Patches to Install First?
The US Cybersecurity and Infrastructure Security Agency (CISA) maintains the Known Exploited Vulnerabilities (KEV) catalog, which it describes as the authoritative source of vulnerabilities that have been exploited in the wild. As of October 2026 the catalog listed 1,731 entries. CISA advises organizations to use the KEV catalog as an input to their vulnerability management prioritization.
For US federal agencies, CISA’s Binding Operational Directive 22-01, issued on November 3, 2021, set deadlines of two weeks for most listed vulnerabilities and six months for those with CVEs assigned before 2021. That directive was revoked on June 10, 2026 and superseded by BOD 26-04, titled “Prioritizing Security Updates Based on Risk”.
Patch Management Steps (NIST)
NIST Special Publication 800-40 Revision 4, “Guide to Enterprise Patch Management Planning: Preventive Maintenance for Technology” (April 2022), defines enterprise patch management as identifying, prioritizing, acquiring, installing and verifying the installation of patches, updates and upgrades across an organization. In practice that means:
- Identify every device and program you run, so nothing is forgotten.
- Prioritize updates for flaws that are actively exploited (for example, those in the KEV catalog) and for internet-facing systems.
- Acquire updates only from the vendor or the built-in update tool.
- Install them, testing first on a small group of machines when downtime would be costly.
- Verify that the update actually installed and the version number changed.
Small businesses can read more in our overview of cybersecurity solutions for small and medium businesses.
What Happens When Software Reaches End of Support?
When a vendor ends support, it stops shipping security fixes, so no amount of clicking “update” will close new holes. Windows 10 reached end of support on October 14, 2025, according to Microsoft; after that date Microsoft discontinued technical assistance, feature updates and security updates. The PC keeps working, but it no longer receives security maintenance. Microsoft offers an Extended Security Updates (ESU) program for consumers who need more time, and devices that meet the requirements can upgrade to Windows 11.
How to Keep Your Devices Updated Safely
- Turn on automatic updates. CISA recommends enabling automatic updates in the device’s settings, often under Software or Security, so updates install as soon as they are available.
- Install critical updates promptly, especially for web browsers and antivirus software, which CISA singles out.
- Update through official channels only. Use Windows Update, the macOS or phone Settings app, or the official app store. A browser pop-up claiming you must download an “update” from a website is a common malware trick; close it and check in Settings instead.
- Restart when asked. Many updates are not active until the device reboots.
- Do not forget routers, smart devices and plugins, which often need manual checks.
- Replace unsupported software that no longer receives security updates.
Updates work best alongside other basics such as creating strong passwords. If you think a device or account has already been compromised, see what to do if you have been hacked.
Frequently Asked Questions
Why are software updates important for security?
Software updates are important because many of them fix known security vulnerabilities. Once a fix is published, attackers can study it and target devices that have not installed it, as happened with WannaCry in May 2017, two months after Microsoft released MS17-010.
Is it safe to delay a software update?
Delaying security updates leaves a known hole open. CISA advises installing critical updates as soon as possible. Organizations sometimes test updates briefly on a few machines first, but actively exploited flaws should be patched quickly.
What is Patch Tuesday?
Patch Tuesday is the second Tuesday of each month, when Microsoft releases its regular security updates. Microsoft formalized this schedule in October 2003.
Does antivirus replace software updates?
No. Antivirus software scans for known malicious files, but it cannot repair a vulnerability in the operating system or an app. Only the vendor’s update closes that hole, so both are needed.
What should I do if my operating system no longer gets updates?
Upgrade to a supported version or replace the device. For example, Windows 10 stopped receiving regular security updates on October 14, 2025; Microsoft points users to Windows 11 or its Extended Security Updates program. You can also stop ransomware early with the steps in our guide to stopping ransomware in its tracks.
1 Comment
cant update my Magellan.