True Stories of Devastating Data Loss (2026 Edition)

Editor’s note: This article is updated regularly to reflect the most recent and relevant data loss incidents and statistics. Last updated: May 2026.

What comes to your mind when you hear the phrase “data loss”? For many outside the IT world, it sounds like a distant, almost abstract threat—scary, sure, but ultimately not “real”. After all, don’t most companies have data loss prevention measures in place? So, discussing “data loss examples” would be as figurative as an algebraic equation. With “x” being an arbitrary number, rather than a real-world event.

Well, no.

The truth is that threat actors continue to become more sophisticated every day. Companies need to constantly refine their data loss recovery strategies to ensure their customers’ data is secure, even when the worst happens.

In this article, we explore some of the more recent data loss examples to show how devastating these data breaches can be and provide some tips for recovery.

Three data loss examples in 2026 (so far)

Stryker Wiper Attack (March 2026)

On March 11, 2026, employees at Stryker, one of the world’s largest medical technology companies with $25 billion in revenue and 56,000 staff, found that their login screens had been replaced with the logo of a barefoot boy holding a slingshot. Many personal phones enrolled in Stryker’s BYOD program were also factory reset, wiping photos, eSIMs, and banking authenticator apps.

The Iran-linked hacktivist group Handala claimed responsibility, framing the attack as retaliation for a U.S. military strike in Iran. The attackers claimed to have wiped more than 200,000 systems and exfiltrated approximately 50 terabytes of data, though those figures remain unverified.

The attack affected order processing, manufacturing, and shipments, and some health systems were forced to delay surgical procedures due to Stryker’s inability to deliver patient-specific products. Stryker confirmed the attack had a material impact on its Q1 2026 earnings

Source(s):

• Stryker official statement
• HIPAA Journal – Stryker Cyberattack
• Proarch – Stryker Wiper Attack Analysis

Cegedim Santé / MonLogicielMedical (Disclosed March 2026)

Cegedim Santé’s MonLogicielMedical platform, which is used by 3,800 doctors across France, was breached in late 2025. Cegedim detected it, filed a criminal complaint in October 2025, and said nothing publicly for four months. France24 broke the story; Cegedim confirmed it on March 3, 2026.

15.8 million patient records were stolen in what became one of the largest healthcare data breaches in European history. Among the 165,000 most sensitive files were doctors’ free-text notes containing HIV status, psychiatric diagnoses, sexual orientation, and mental health conditions, with even some politicians among those exposed.

Source:

• Strobes – Worst Data Breaches of March 2026

Navia Benefit Solutions (January 2026)

In one of the more quietly devastating breaches of early 2026, Navia Benefit Solutions, a Washington-based employee benefits administrator serving over 10,000 employers across the U.S., suffered unauthorized access to its systems that lasted nearly a month, from December 22, 2025, to January 15, 2026. The forensic investigation confirmed that its computer environment was subject to unauthorized access during that window, with the intrusion identified around January 15, 2026.

What makes this breach particularly striking isn’t just its scale, even though\ 2,697,540 individuals had their sensitive personal and health information exposed, including names, dates of birth, Social Security numbers, phone numbers, email addresses, and health plan information.

No, the true devastation was the how.

Rather than ransomware or a network compromise, a read-only API flaw gave attackers 24 days of clean, silent access to 2.7 million records. Victims were notified weeks after the fact, and no ransomware group has claimed responsibility.

Source(s):

• HIPAA Journal – Navia Benefit Solutions Data Breach
• BleepingComputer – Navia discloses data breach
• CPO Magazine – Data Breach Hits Benefits Administrator

Other data loss examples, horror stories to note

Colonial Pipeline Cyberattack

One of the most infamous cyberattacks in history occurred in May 2021. It infected some of Colonial Pipeline’s systems and shut them down for several days. The Colonial Pipeline Company halted its pipeline operations in an attempt to contain the attack. This massively impacted the US oil infrastructure. The attackers, a hacker group called DarkSide, breached the network through an exposed VPN account password, which was likely obtained through a separate data breach.

After five days of the Colonial Pipeline network being offline, they finally paid the 75 bitcoin (or $4.4 million USD) ransom. A tool was provided to the company to restore the system. Though the FBI was able to recover 64 of the 75 bitcoins paid to DarkSide, a large amount of money was still lost in the breach.

And even with the ransom paid, Colonial Pipeline ended up restoring from its own backups anyway. This is due to long restoration times from the tool itself. Unfortunately, it’s not known how much data was lost and why backups were not used initially. But it’s an important lesson in making sure that, even if you have a process in place, backups are always tested.

Source(s):

• The Colonial Pipeline Ransomware Attack: How to Beat Ransomware with a CDP Approach
• Colonial Pipeline hack explained: Everything you need to know
• Colonial Pipeline facing $1,000,000 fine for poor recovery plans

Toy Story 2 deleted

You may have seen this story make the rounds on various backup horror story posts, but if you haven’t, it’s a good one. Toy Story 2 was in development in 1998, when one day, one of the employees happened to be looking at a directory in which the assets for the character Woody were stored. They noticed that the number of files was decreasing with each refresh.

It turns out that a command was run on the system in an attempt to clear out some unwanted files. Unfortunately it was run at the root level of the Toy Story 2 project. And the system was slowly working its way through all of the files. They eventually scrambled to shut off the power to the server immediately in a rushed attempt to stop the command from running. But upon being brought on a few hours later, 90% of the work was deleted thanks to the stray command.

Pixar was not new to data being deleted and had regular tape backups running. Unfortunately for the team, these backups were never tested, which means the backups were stored on a tape drive, and as the files met the file limit, new data was no longer being added to the drive. Any restores they managed to get were full of errors, and no one was sure how they’d recover the lost data.

Fortunately, long story short, the movie’s Supervising Technical Director (Galyn Susman) happened to have a backup stored at her house. She’d been working from home after she gave birth to her son. The backup was about two weeks old, but it was better than nothing. This off-site backup saved the day, and the movie. (Until it was scrapped and re-animated, though not for backup and recovery reasons…)

This story shows that testing is essential, even if you believe you’re backing up your data

Source:

• How Pixar’s Toy Story 2 was deleted twice, once by technology and again for its own good

AT&T data breach

In one of the largest telecom breaches on record, AT&T suffered a massive data breach that affected over 86 million customers. Sensitive personal information, including names, birthdates, phone numbers, addresses, and over 44 million Social Security numbers, was fully decrypted and appeared first on a Russian cybercrime forum. The breach is associated with accounts lacking multifactor authentication and is possibly linked to the ShinyHunters hack from April 2024.

The key takeaway for IT teams: Multifactor authentication (MFA) isn’t optional. A single exposed account without it can become the entry point for a breach affecting tens of millions of people.

Source(s):

• Major data breach exposes 86M AT&T customer records, including social security numbers — here’s how to know if you were affected
• AT&T Customers Issued Security Warning: ‘Take Action’
• Hackers Leak 86 Million AT&T Records with Decrypted SSNs

Marks & Spencer cyberattack

The British retail giant reported a significant cyberattack in April 2025 that compromised customer personal data and disrupted online services. This resulted in the theft of customer personal data. Reports indicated the attack cost approximately 300 million pounds ($403 million) in lost operating profit, with disruption to its online services until July 2025.

Source(s)

• M&S’ $400 million cyberattack upheaval to linger into July
• M&S says hackers gained access to customer data in April cyberattack

Data loss nightmares from Reddit

Not every data loss story comes from a large company, but many happen within the smaller IT organizations you may be a part of! There are loads of stories of SysAdmins losing backups of VMs, failed drives, database deletions, and a lack of locked-down permissions.

What is your worst data loss nightmare?
by u/baconlayer in sysadmin

What is your worst data loss nightmare?
byu/baconlayer insysadmin

Data loss statistics for 2025-2026

To further stress the importance of preparation, let’s look at some recent statistics:

• The global average cost of a data breach in 2025 was $4.44 million, which is the first decline in five years, while the U.S. average hit an all-time high of $10.22 million. (IBM Cost of a Data Breach Report 2025)
• The same study found that the average breach lifecycle stands at 241 days, or 181 days to detect, and 60 days to contain. (IBM Cost of a Data Breach Report 2025)
• Third-party and supply chain breaches now account for 30% of all incidents. (IBM Cost of a Data Breach Report 2025)
• Ransomware was present in 44% of all breaches analyzed in the Verizon 2025 DBIR, up from 32% the prior year. (Verizon DBIR 2025 – Download)
• The Identity Theft Resource Center tracked 3,322 data compromises in the U.S. in 2025; a new all-time record. (ITRC 2025 Annual Data Breach Report)
• Total reported cybercrime losses reached $20.877 billion in 2025, which is a 26% increase from the prior year. (FBI IC3 2025 Report – Download)

Why data loss prevention is so important

Data loss can come from any number of sources, whether it’s a hurricane that causes major flooding in a server room or a bad actor threatening the safety of critical data by demanding a ransom for its safe return. If an organization only has a single copy of data on that waterlogged hard drive or in the hands of a cybercriminal, the chances of full data loss recovery are slim to none.

This isn’t an exaggeration, either. According to Veeam’s 2025 Ransomware Trends & Proactive Strategies report, only 30% of organizations have a pre-defined chain of command for incident response. This, coupled with only 52% of organizations reporting any major improvements in security team communication, is exceedingly troubling, especially as cyberattacks continue to evolve each year.

In 2026, the threat landscape has expanded further to include AI-assisted phishing, deepfake social engineering, and geopolitically motivated wiper attacks; attack types that don’t fit neatly into traditional ransomware recovery playbooks. This reinforces

the necessity for strong (and reliable) data loss prevention strategies.

For many businesses, data loss is no longer a matter of if, but when. Making proactive backup strategies, planning, and reliable data loss recovery processes more important than ever.

How to improve your data loss prevention strategy

If reading those stories made you nervous, don’t worry. You can take proactive steps now to reduce risk and ensure fast data loss recovery if the worst happens.

Our Tome of Backup Best Practices is a great asset to have in your back pocket and includes tips on choosing your archival method & storage destination, along with maintenance & restoration.

Even so, here are a few steps you can add to your backup strategy to ensure that the backups perform as intended:

Enable comprehensive backup alerts

Don’t just rely on failure alerts; include alerts for successful backups, cloud syncs, backup length, etc.

Keep your backup software up-to-date

Update backup software regularly, as your backup vendor may introduce new features or fix critical bugs. This is increasingly important as vendors patch critical vulnerabilities. In fact, the Verizon 2025 DBIR found that the median time from vulnerability disclosure to mass exploitation is now zero days for edge devices.

Define clear RPO and RTO targets

Recovery point objective (RPO) determines how much data you need to recover, and recovery time objective (RTO) determines how quickly you need the data restored. These metrics will inform how often you set backups and your restoration methods.

Test your backup process regularly

This may be the most important takeaway from the stories above. Backups are only good if they’re successful, so make sure you’re auditing your backups regularly and consistently.

Develop a disaster recovery checklist

List everything that needs to be done in case of data failure, including your potential RPO & RTO, who is involved in recovery, where the backup is stored, etc.

Follow the 3-2-1 backup rule

The 3-2-1 backup rule is considered essential for a reason. This rule ensures that you have multiple copies of your data in multiple locations so that no matter the disaster, you always have a place to recover from.

Keep three copies of your data: two local (on different devices) and one off-site. It’s a time-tested data loss prevention strategy.

Constantly update your documentation

Keep the process documented so that anyone can manage data restoration. Also, make sure other team members are informed about restoration processes.

Backing up SaaS data is still important

Just because data is being stored in “the cloud” doesn’t mean that it’s being backed up by your cloud provider. Many providers don’t offer backup by default, so it’s crucial you implement dedicated SaaS data loss recovery solutions. This applies to Microsoft 365, Google Workspace, Salesforce, and other platforms.

Print out your disaster recovery plans

If you’re trying to restore data and only have a digital copy of your disaster recovery plans, that document is likely part of what was lost, and you may have trouble accessing it. A physical copy ensures accessibility.

Don’t neglect your networking hardware

Backups aren’t just for operating systems, servers, and data but also for your switch configs, firewall configs, and more.

Watch this brief video for key takeaways from ‘True Stories of Devastating Data Loss‘.

How NinjaOne Backup helps prevent devastating data loss

The incidents above share a common thread: Organizations that recovered fastest had tested, recent, segmented backups, and those that suffered the worst either lacked them entirely or had never verified they worked.

NinjaOne Backup is built around exactly this reality. As part of the NinjaOne Platform, it provides unified backup coverage across endpoints, all managed from a single interface, so there’s no guessing which system has current data when something goes wrong.

Organizations like Rare, a global leader in inspiring social change for people and nature, have seen this firsthand. Ron Thomas, Vice President of Technology, writes,

“Having everything in NinjaOne’s single pane of glass, whether it’s our antivirus or Backup, helps us maintain global security. We have a tighter security posture, we can mitigate threats in real time, and we can go into ransomware recovery if needed because we have backups available,” shared Thomas. “Plus, we can pull reporting across all these systems, which enables us to better serve our customers.”

Read more NinjaOne customer stories or check out NinjaOne Reviews.

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