[Blog](/blog) Show links Resources [Blog](/blog) [Breaches](/breaches) [eBooks, reports, & more](/resources) [Events](/events) [News](/news) [Data Breaches](/category/data-breaches) Show links Categories [Attack Surface Management](/category/attack-surface-management) [Company News](/category/company-news) [Compliance and Regulations](/category/compliance-and-regulations) [Cybersecurity](/category/cybersecurity) [Data Breaches](/category/data-breaches) [DevOps](/category/devops) [Human Cyber Risk](/category/human-cyber-risk) [Risks and Vulnerabilities](/category/risks-and-vulnerabilities) [Third-Party Risk Management](/category/third-party-risk-management) [Vendor Risk Management](/category/vendor-risk-management) [The Mother of All Breaches: A Corporate Credential Security Wake-Up Call](/blog/the-mother-of-all-breaches) Publish date September 20, 2026 {x} minute read # The Mother of All Breaches: A Corporate Credential Security Wake-Up Call [Get a demo](/contact-sales) [Free trial](/demo) [Scan my domain](https://www.upguard.com/tools/dark-web-scan) [Download the PDF guide](/resources/complete-guide-to-data-breaches) [Free trial](/demo) [Scan my domain](https://www.upguard.com/tools/dark-web-scan) Written by [Edward Kost](/team/edward-kost) Senior Cybersecurity Writer Edward is a cyber writer with a mechanical engineering background. His work has been referenced by academic institutions and government bodies. Reviewed by [Phil Ross](/team/phil-ross) Chief Information Security Officer Phil is a Forrester Zero Trust Strategist leveraging decades of experience in enterprise cybersecurity architectures. Table of contents eBook A Complete Guide to Data Breaches Free resource ### A Complete Guide to Data Breaches Learn how to avoid a costly data breach with a comprehensive prevention strategy. [Download now](/resources/complete-guide-to-data-breaches) Cybersecurity researchers uncovered what is being called the "mother of all breaches," a colossal dataset containing 16 billion login credentials, including user passwords for Google, Facebook, and Apple. To put that figure in context, the cache represents twice the current human population of the Earth. This event was not the result of a single breach, but likely a compilation of data stolen from multiple breaches over many years.  Cybernews analysts believe a patchwork of infostealer malware strains (think [RedLine](https://www.justice.gov/usao-wdtx/pr/us-joins-international-action-against-redline-and-meta-infostealers), [Raccoon](https://www.justice.gov/usao-wdtx/victim-assistance-raccoon-infostealer), and [Lumma](https://www.microsoft.com/en-us/security/blog/2025/05/21/lumma-stealer-breaking-down-the-delivery-techniques-and-capabilities-of-a-prolific-infostealer/)) quietly siphoned logins from compromised endpoints. Once collected, the data was merged into 30 separate datasets and posted online, where it was scraped before the original links vanished.  Because passwords in these dumps are typically sold for a few dollars, or even traded for reputation in hacker communities, the material spreads rapidly and is hard to eradicate. The only certainty is that every exposed credential will be tested against corporate VPNs, SaaS portals, and email services in search of a foothold. Emails (96.10%) and passwords (88.16%) appeared in nearly all breaches and leakages [observed by Constella in 2023](https://ocedic.com/_newsletters/2024/220824/docs/Constella_IdentityBreachReport-2024.pdf), and according to the[ IBM cost of a data breach report](https://www.ibm.com/reports/data-breach), compromised credentials were the most common initial attack vector of data breaches in 2024.  Combine these findings with a [rising trend of Shadow IT practices](https://www.kaspersky.com/blog/human-factor-360-report-2023/) and this latest monumental breach, and a disturbing reality begins to settle in: the odds that your organisation’s usernames and/or passwords are circulating amongst cybercriminals are uncomfortably high. ## The importance of tracking identity breaches An identity breach — where employee credentials are stolen and exposed in cybercriminal networks — is one of an organization's most direct and dangerous threats. In the hands of cybercriminals, compromised corporate credentials open the door to a host of cyber attacks, including ransomware deployment, privilege escalation, and sensitive data theft. Relying on employees to report when they’ve reused a compromised password is not a viable security strategy. Organizations need a proactive, automated way to discover when and where their corporate credentials have been exposed on the deep, dark, and surface web. This is where continuous identity breach monitoring becomes an essential layer of modern cybersecurity defense. By actively scanning the open, deep, and dark web for corporate credentials, security teams can proactively identify compromised corporate accounts and take immediate action — such as forcing a password reset — instead of only becoming aware of the exposure after an attacker attempts to use a stolen login. A [dark web scan tool](/tools/dark-web-scan) is the one-time version of that check — how many findings, in which categories — before you staff the investigation. The key to effective identity breach protection at scale is a combination of continuous automation and rich contextualization, so security teams can quickly focus on true positives and actionable risk, not noise. UpGuard’s Identity Breaches module continuously monitors the open, deep, and dark web, including forums, marketplaces, and data leak sites, for your company's exposed credentials, providing rich context for discovered incidents so that compromised accounts can be rapidly secured before they have a chance to be exploited. ## The human factor you can’t ignore While monitoring for external credential leaks is critical, human behaviors inside the organisation often determine whether attackers can exploit exposed accounts. Weak password practices, reuse of personal passwords on corporate apps, and risky sharing habits continue to drive many account compromises. Comprehensive [human cyber risk management](https://www.upguard.com/blog/why-human-risk-management-is-important) goes beyond identity breach mitigation. It also includes daily monitoring of shadow IT and file-sharing habits. These signals are then converted into dynamic user-risk scores, helping security teams understand which remediation tasks to prioritize, such as password resets or targeted security coaching. ## A smarter approach to account compromise The "mother of all breaches" is a startling wake-up call of both the vulnerability of corporate credentials and the unsettling likelihood that cybercriminals are currently trading the keys to your network. While continuous monitoring for corporate leaks is now a critical security function, it only addresses the symptom. A truly resilient credential protection strategy must also tackle the cause of these events by managing the internal human behaviors leading to account compromises. This proactive, two-pronged approach is the most viable path to not just knowing when your organization has been impacted by a breach but having the processes in place to respond before attackers do. eBook A Complete Guide to Data Breaches Free resource ### A Complete Guide to Data Breaches Learn how to avoid a costly data breach with a comprehensive prevention strategy. [Download now](/resources/complete-guide-to-data-breaches) ## Related posts Learn more about the latest issues in cybersecurity. Attack Surface Management #### [Find Out if You're Exposed on the Dark Web](/blog/find-out-if-youre-exposed-on-the-dark-web) Answer 5 quick questions to predict what a dark web scan will find about your company. Then run the free scan to see your real exposure. [](/team/lance-turner) [Lance Turner](#) October 14, 2026 Data Breaches #### [Your First Dark Web Scan Report, Explained](/blog/your-first-dark-web-scan-report-explained) You scanned your domain. What do the results mean? [](/team/lance-turner) [Lance Turner](#) October 13, 2026 Data Breaches #### [Good Security Rating? Your Dark Web Exposure Says Otherwise](/blog/good-security-rating-your-dark-web-exposure-says-otherwise) Scan your domain to see just how exposed you are on the Dark Web. [](/team/lance-turner) [Lance Turner](#) October 13, 2026 Data Breaches #### [How to Prevent Data Breaches in 2026 (Highly Effective Strategy)](/blog/prevent-data-breaches) Learn how to implement an effective security control strategy for defending against data breaches in 2026. [](/team/edward-kost) [Edward Kost](#) October 21, 2026 Attack Surface Management #### [Attack Surface Management Vendors Compared](/blog/attack-surface-management-vendors-compared) We compared ASM vendors and helped you rate them before agreeing to a POC! [](/team/lance-turner) [Lance Turner](#) October 13, 2026 Attack Surface Management #### [The Blind Spot in Brand Protection: Why App Stores Slip Past Standard Monitoring](/blog/the-blind-spot-in-brand-protection-why-app-stores-slip-past-standard-monitoring) Do Brand Protection Solutions scan the Apple App Store and Google Play? Don't wait to find out. [](/team/lance-turner) [Lance Turner](#) September 22, 2026 [All posts](/blog) Experience superior visibility and a simpler approach to cyber risk management [Get a demo](/contact-sales) [Free trial](/demo)