[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$f32s1m7pqe6yl9":3},{"success":4,"breach":5},true,{"_id":6,"name":7,"title":8,"slug":9,"domain":10,"breachDate":11,"addedDate":12,"modifiedDate":13,"contentUpdatedAt":14,"source":15,"sourceUrl":16,"sourceUrls":17,"pwnCount":21,"affectedCount":21,"affectedCountStatus":22,"affectedCountLowerBound":23,"affectedCountUnit":24,"hasEnglishDescription":4,"severity":25,"dataClasses":26,"description":29,"seoTitle":10,"seoTitleEn":30,"seoDescription":10,"seoDescriptionEn":31,"logoUrl":32,"isVerified":33,"isSensitive":33,"isSpamList":33,"isMalware":33,"company":34},"68e3266eda11adda48825152","Collection1","Collection #1 Alleged Data Exposure","collection-1","","2019-01-07T00:00:00.000Z","2019-01-16T21:46:07.000Z","2019-01-16T21:50:21.000Z","2026-07-18T23:47:49.553Z","Unverified breach record","https:\u002F\u002Fwww.troyhunt.com\u002Fthe-773-million-record-collection-1-data-reach\u002F",[16,18,19,20],"https:\u002F\u002Fwww.wired.com\u002Fstory\u002Fcollection-one-breach-email-accounts-passwords\u002F","https:\u002F\u002Fwww.recordedfuture.com\u002Fresearch\u002Fcollection-1-data-breach","https:\u002F\u002Fdatabreach.com\u002Fbreach\u002F00-combos",772904991,"known",null,"email_identifiers","Critical",[27,28],"Email addresses","Passwords","\u003Cp>The Collection #1 incident is a large collection of credentials that was revealed in January 2019. It should not be considered as a singular customer file taken from a single company's systems; it was formed by combining email and password pairs collected from various old breaches, forum posts, and password lists. Therefore, the significance of the record is more about the possibility that the same email address may have entered attackers' trial lists along with old passwords, rather than indicating that a specific service account was compromised.\u003C\u002Fp>\u003Cp>The collection has been associated with roughly 2.7 billion rows of raw content and, after cleaning and deduplication, has been matched with 772,904,991 unique email addresses. The verified data classes are email addresses and passwords. Records are kept in the unverified class; because it is known that the content comes from thousands of different old sources, the original source of each row cannot be precisely distinguished, and some source names may be incorrect or reused. Nevertheless, since the content contains real personal information, it should be taken seriously from a user perspective.\u003C\u002Fp>\u003Ch2>Leaking Data Types and Risks\u003C\u002Fh2>\u003Cp>The two main types of data verified in Collection #1 are email addresses and passwords. The email address indicates which identity the attacker will use to initiate an attempt; the password directly increases the risk of account takeover if the same or a similar password has been used on other services. The collection has not been verified with payment card, official ID, health information, private message, or physical address fields. This limitation is important to convey the actual risk to the user without causing unnecessary panic.\u003C\u002Fp>\u003Cp>If passwords circulate in plain text or in a usable password format, the attacker's technical barrier decreases. Even old and no longer used passwords are risky because many people continue using their old password with small changes. Email and password pairs can be used in automated login attempts, account creation checks, password reset flows, and targeted phishing messages. The risk is particularly high for users who repeat the same password for years.\u003C\u002Fp>\u003Ch2>Verified Scope and Boundaries\u003C\u002Fh2>\u003Cp>The incident date is considered to be January 7, 2019. The record was added to reliable leak checklists on January 16, 2019, and shortly after on the same day, it underwent a metadata change. The number of affected accounts should be kept as 772,904,991 unique email addresses. Higher raw row counts should not be read as the number of users due to recurring combinations, faulty rows, and different file formats.\u003C\u002Fp>\u003Cp>Collection #1 is in the unverified category. This classification does not mean that there is no real user information in the dataset; it means that a limited trust rating is given because all of the sources cannot be individually verified with certainty. The record should not be linked to a single domain, nor should it be presented as a current system breach of a specific company. The main information that should be conveyed to the user is whether the email address appears in a large credential stuffing collection containing password combinations.\u003C\u002Fp>\u003Ch2>User Groups at Risk\u003C\u002Fh2>\u003Cp>The highest risk group consists of people who use the same email and password on multiple services. Passwords used for old game accounts, forum memberships, shopping accounts, social media accounts, and non-work services may eventually have been reused on critical accounts. Even if the user does not remember their old password, attackers may try variations that resemble the same pattern.\u003C\u002Fp>\u003Cp>Corporate users can also be affected. Employees who register on personal sites with their work email may put their corporate account at risk if they reuse old passwords in work systems. Addresses of people working in administration, finance, human resources, and support teams are particularly valuable; because in addition to a successful login attempt, attackers may also initiate social engineering attempts with fake invoices, file sharing, supposed security alerts, and imitation of internal correspondence.\u003C\u002Fp>\u003Ch2>Urgent Measures to Be Taken\u003C\u002Fh2>\u003Cp>The user who caused a positive match should first check their email account and all important accounts where they might have used the same password pattern. The same or similar password should not be left on any service, and a unique and strong password should be assigned for each account. Using a password manager makes this step more reliable. Since the email account is the recovery hub for other accounts, two-factor authentication should be enabled here as a priority.\u003C\u002Fp>\u003Cp>Old sessions, unrecognized devices, unexpected password reset messages, and security alerts should be reviewed. The user may not always know which service the password in the collection comes from; therefore, changing just one site is not sufficient. Unique passwords and strong second factors should be applied in critical areas such as banking, email, cloud storage, social media, shopping, and work accounts.\u003C\u002Fp>\u003Ch2>Long-Term Security Strategies\u003C\u002Fh2>\u003Cp>Credential stuffing collections are repackaged for years, re-enter circulation under different names, and combined with new lists. Therefore, a one-time password change is not sufficient for long-term defense. Users should completely abandon old password patterns, use different passwords for each service, and prefer app-based verification or security keys for important accounts.\u003C\u002Fp>\u003Cp>Organizations should treat the appearance of employee passwords in leak lists as a separate risk signal. Policies that prevent password reuse, mandatory multi-factor authentication, suspicious login attempt alerts, and risky geography session checks reduce the impact of such collections. Employees should be informed about how email address and password pairs are abused, and it should be ensured that old personal account habits are not carried over to work accounts.\u003C\u002Fp>\u003Ch2>Record Control and User Action\u003C\u002Fh2>\u003Cp>If the query result is positive, it means that the email address is included in the Collection #1 database. This result does not mean that all passwords are current or that a particular company account has been compromised at that moment; however, it requires a thorough check against password reuse. The user should check the unique password and two-step verification status on all important accounts where the same email address is used.\u003C\u002Fp>\u003Cp>If the result is negative, it is understood that no match was found in this collection; however, the same address may appear in other breaches or in subsequent credential stuffing lists. Regular monitoring, using unique passwords, strong email account security, and maintaining the habit of being cautious with suspicious messages should be continued. Large collections like Collection #1 should be regarded as a permanent warning that old passwords should never be reused.\u003C\u002Fp>","Collection #1 Alleged Data Exposure (772.9 Million Email Identifiers)","Collection #1 Alleged Data Exposure. 772.9 Million email identifiers were reported. Reported data: Email addresses, Passwords. Review the scope, risks, and…","\u002Fuploads\u002Flogo\u002Fcollection1.webp",false,{"name":35,"sector":36,"country":10,"website":10,"websiteArchiveUrl":10,"websiteStatus":10,"websiteCheckedAt":23},"Collection #1","Credential Collection"]