[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$f12ujnsduvr63i":3},{"success":4,"breach":5},true,{"_id":6,"name":7,"title":8,"slug":7,"domain":9,"breachDate":10,"addedDate":11,"publishedAt":12,"modifiedDate":13,"contentUpdatedAt":14,"source":15,"sourceUrl":16,"sourceUrls":17,"pwnCount":18,"affectedCount":18,"affectedCountStatus":19,"affectedCountLowerBound":12,"affectedCountUnit":20,"hasEnglishDescription":4,"contentLocale":21,"availableLocales":22,"translations":24,"severity":27,"dataClasses":28,"description":32,"seoTitle":33,"seoDescription":34,"logoUrl":35,"isVerified":4,"isSensitive":36,"isSpamList":36,"isMalware":36,"company":37},"6a452308a20f867c8ba8e70e","eurofiber","Eurofiber Data Breach","eurofiber.com","2025-11-13T00:00:00.000Z","2025-11-20T02:44:14.000Z",null,"2026-07-03T10:22:37.094Z","2026-07-19T00:02:18.618Z","Third party breach","",[],10003,"known","unknown","en",[21,23],"tr",{"en":25,"tr":26},{"slug":7},{"slug":7},"Medium",[29,30,31],"Email addresses","Names","Phone numbers","\u003Cp>The Eurofiber data breach is a verified record from November 2025 related to ticket management and the customer portal environment associated with the France operation. The record contains 10,003 unique email addresses; a smaller number of names and phone numbers are also affected. Although obvious data classes appear limited, the context of telecom infrastructure is significant. Corporate customers, support requests, and technical communications could create opportunities for attackers to craft fake support messages or supply chain-themed social engineering attacks. The record does not list passwords, payment cards, identity documents, or an extensive customer archive; the alleged additional technical files have not been included in the verified user data classes.\u003C\u002Fp>\u003Ch2>Leaking Data Types and Risks\u003C\u002Fh2>\u003Cp>Supported data classes are email addresses, names, and phone numbers. When email and phone are used together, fake service notifications, support tickets, invoice checks, or network outage alerts become more convincing. Name information personalizes the message. Since telecom and fiber network customers are accustomed to technical support messages, attackers can exploit this context. Under this category, more sensitive technical claims such as VPN files, credentials, code archives, or certificates are not kept as a data class; because fields verified at the user level are limited to email, name, and phone.\u003C\u002Fp>\u003Ch2>Verified Scope and Boundaries\u003C\u002Fh2>\u003Cp>The Eurofiber incident is a verified event supported by company statements and security news. However, the verified user data fields are limited. Although the threat actor has claimed to have obtained broader technical data, this record limits the fields that the user will see in query results to proven personal data. This distinction is important; otherwise, it could give the user the false impression that a password or critical infrastructure data has definitely been leaked along with their record. The record is kept in the context of the incident associated with the France operation.\u003C\u002Fp>\u003Ch2>User Groups at Risk\u003C\u002Fh2>\u003Cp>Eurofiber France customers, corporate individuals who have submitted support requests, technical contact points, dealer or solution partner representatives, and employees using the same email address for different IT services are at risk. Attackers may act as if they have a history of support requests and send messages to reset passwords, report network outages, renew portals, or update contracts. Individuals with phone numbers may be called directly. If email security is weak in corporate accounts, this data could be the first step in a larger phishing chain.\u003C\u002Fp>\u003Ch2>Urgent Measures to Be Taken\u003C\u002Fh2>\u003Cp>Users who are matched with Eurofiber should verify messages related to support, billing, portal updates, or network outages through the official channel. One-time codes, passwords, or remote access permissions should not be given for technical support requests received by phone. Two-factor authentication should be enabled on the email account, and corporate users should report the match to the IT team. Since the password field is not listed in this record, verification and awareness are prioritized against targeted phishing risk rather than a panic password change.\u003C\u002Fp>\u003Ch2>Long-Term Security Strategies\u003C\u002Fh2>\u003Cp>Contact emails used in telecommunications and infrastructure services should be separated from personal accounts. Role-based email addresses, strong multi-factor authentication, and approved support processes should be used for corporate technical contacts. Support portal links should be opened through a known domain, not through email. Requests from suppliers and network service providers should be verified through a second channel. This way, even if communication data is leaked, it becomes more difficult for an attacker to complete the phishing chain.\u003C\u002Fp>\u003Ch2>Record Control and User Action\u003C\u002Fh2>\u003Cp>If a Eurofiber match appears in the LeakData check, the user should consider this not as a password leak, but as a telecom support communication risk. The match indicates that name\u002Fphone information has been exposed in emails and some records. The user should carefully verify support and portal messages coming on behalf of Eurofiber or associated brands, and share this information with the security team in a corporate environment. Even if the record is verified, additional technical claims have not been extended as a personal data class; action should be taken accordingly. Corporate users should share this match with internal support or the security team to create a pre-warning against fake support flows.\u003C\u002Fp>","Eurofiber Data Breach (10 Thousand Reported Records)","Eurofiber Data Breach. 10 Thousand reported records are reported. Reported data: Email addresses, Names, Phone numbers. Review the scope, risks, and…","\u002Fuploads\u002Flogo\u002Feurofiber_com.webp",false,{"name":38,"sector":39,"country":40,"website":9,"websiteArchiveUrl":16,"websiteStatus":16,"websiteCheckedAt":12},"Eurofiber","Telecommunications \u002F Fiber Network","France"]