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Liquid Network
September 6, 2026
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[ hack, financial, technology ]
Hackers exploited a bug in Liquid Network, the Blockstream-developed Bitcoin sidechain, on Sept. 6, 2026 to mint unbacked L-BTC and withdraw ~4,000 BTC ($320M) from its federation wallet. Liquid halted the network; self-described white hats returned 3,400 BTC.
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Association Francophone de Tennis de Table
September 7, 2026
Belgian table tennis federation AFTT confirmed a cyberattack in Sept. 2026 after a hacker claimed 1.69 GB of data on about 66,852 members and 17,441 users and posted samples. AFTT said it found no sign phone numbers or emails were taken and that most data was already public.
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Undisclosed organizations
September 7, 2026
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[ phishing, technology ]
CloudSEK found that BigBear 2.0, a phishing-as-a-service operation using adversary-in-the-middle login pages, captured over 5,000 Microsoft 365 credentials and session cookies and bypassed MFA at 258 organizations in 40+ countries. Operators remain unidentified.
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Undisclosed Philippine nuclear research agency
September 8, 2026
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[ espionage, leak, government ]
A suspected Chinese-speaking operator exploited an ownCloud authentication weakness and stole 176 files totaling about 372 MB from a Philippine nuclear research agency. The stolen material was already present on attacker-controlled infrastructure when researchers discovered it on 13 August 2026; the exact theft date is not established, so event_date uses the supplied source publication date.
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National Directorate of Cyber Security (DNSC)
September 8, 2026
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[ ddos, government, technology ]
Attackers launched approximately 2.8 million access requests against dnsc.ro at around 17:00 on 8 September 2026. About 50,000 requests passed DNSC's technical filters and overloaded the website, causing an interruption lasting less than 30 minutes. DNSC director Dan Cmpean said the attackers sought reputational impact by demonstrating vulnerability and undermining public and partner confidence. The specific group and its country of origin were not attributed.
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Undisclosed healthcare organization
September 8, 2026
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[ hack, healthcare, technology ]
Google's Mandiant reported that a data extortion group breached an unnamed healthcare organization and stole drug research, corporate data and a proprietary AI model, then threatened to publish it unless paid. Disclosed in GTIG's Q2 2026 AI Threat Tracker.
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Undisclosed AI media generation company
September 8, 2026
Google's Mandiant reported that attackers compromised an unnamed AI media generation company, stole its source code, prompts, skills, model scripts and secrets, and demanded payment under threat of publishing them. Disclosed in GTIG's Q2 2026 AI Threat Tracker.
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Hilltop National Bank
September 8, 2026
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[ finance, hack ]
Hilltop National Bank, a Casper, Wyoming community bank, had IT disruptions from Sept. 8, 2026, then identified a cybersecurity incident, took internal systems offline and closed all branches Sept. 9. Online banking was out until about Sept. 22. Cause and actor undisclosed.
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Undisclosed enterprise company investigated by Unit 42
September 9, 2026
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[ hack, technology ]
A human ransom attacker used multiple frontier AI agents to compromise an undisclosed enterprise network in less than 10 hours. The agents extracted credentials and cloud keys from code repositories, a secrets-management system and other enterprise applications, allowing expansion into cloud and identity infrastructure. An attempted Terraform backdoor was blocked. Unit 42 clarified that the incident was an intrusion rather than a ransomware attack. The exact intrusion date, victim industry and victim country were not disclosed; event_date therefore uses the supplied source publication date.
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Brevo (formerly Sendinblue)
September 9, 2026
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[ hack, technology, finance ]
On September 9-10, 2026, an intruder abused a flaw in Brevo SAML SSO tenant scoping to access 138 customer accounts. The attacker used six of the accounts to distribute fraudulent messages from legitimate customer email channels and exported contacts from 43 accounts. Trezor was one affected Brevo customer; 347,149 newsletter email addresses were exported and misleading messages reached roughly 347,000 subscribers. Brevo shut the attack route and signed out sessions on September 10. The attack did not establish a breach of Trezor wallet infrastructure. The 138 customer accounts are effects within one compromised Brevo platform, not separate CED records.
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Air Canada
September 9, 2026
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[ ransomware, leak, technology ]
The Gentlemen ransomware group listed Montreal-based Air Canada on its leak site on Sept 9, 2026, claiming to have stolen 51,409 'critical files'. A dataset of about 489,000 mostly email records was later indexed; Air Canada has not confirmed it; no disruption was reported.
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Surfshark
September 9, 2026
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[ misconfiguration, technology, leak ]
VPN provider Surfshark (Netherlands) disclosed on Sep 9, 2026 that a threat actor accessed a misconfigured, internet-exposed internal test server holding engineering material and an isolated proxy server. Detected Aug 31; Surfshark says no user data or VPN services were affected.
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Undisclosed organizations
September 9, 2026
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[ ransomware, espionage, technology ]
Cisco Talos disclosed on 9 Sep 2026 that three clusters exploited Cisco Secure FMC flaws at unnamed organizations: a Qilin-linked affiliate stole data and deployed Qilin ransomware, Sandworm-linked UAT-11823 harvested firewall configurations, and UAT-12197 stole credentials.
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Wilke
September 9, 2026
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[ ransomware, technology ]
Wilke, an Odense, Denmark market research and polling firm, was hit by a ransomware attack that took its systems down; CEO Stine Halberg said returning to full capacity took longer and was bumpier than the few weeks she had hoped. Attack date and attacker not disclosed.
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Trezor
September 9, 2026
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[ phishing, hack, technology ]
Hackers who breached email provider Brevo on Sept 9, 2026 exported Trezor's newsletter contacts and sent ~347,000 fake security alerts from help@trezor.io urging users to enter wallet backups; ~2,500 clicked. Prague-based Trezor said its own systems were unaffected.
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Helpfeel
September 11, 2026
Kyoto-based Helpfeel said a hacker exploited a flaw in the upload server of its Gyazo image-sharing service on Sept 11, 2026 and accessed about 23.62M user records and 490M image metadata records before being cut off Sept 12. Users told to reset passwords; image access curbed.
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Undisclosed Costa Rican credit bureau
September 12, 2026
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[ leak, finance, technology ]
Costa Rican officials linked jarol1488 to theft of a credit bureau database containing personal and financial information. Authorities detected the public posting on September 12, 2026; this date is used as a discovery proxy, not a verified intrusion or extraction date. Cero Riesgo was named in attacker material but had not confirmed that the published information originated from its systems. Officials authenticated only part of a public sample, not the claimed 400 million-plus records. The database was advertised for US$2,500. The exact extraction system was not forensically confirmed. The minister described the attacker as South American without identifying a country.
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Kimberly-Clark
September 13, 2026
Extortion group ShinyHunters listed Irving, Texas consumer-products maker Kimberly-Clark on its leak site on Sept 13, 2026, claiming stolen data and setting a Sept 16 deadline. A dataset of about 650,000 records was later indexed; the company had not confirmed the claim.
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Undisclosed BigCommerce merchants
September 13, 2026
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[ hack, technology, retail ]
Attackers used a stolen BigCommerce API key of the Ribon app on Sept 13-17, 2026 to download shopper data page by page from BigCommerce merchant stores and inject malicious scripts into some storefronts. BigCommerce revoked the key, removed the app and notified merchants.
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Fastr
September 13, 2026
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[ hack, technology, retail ]
Boston e-commerce software firm Fastr suffered a system compromise in which attackers stole BigCommerce API credentials for the Ribon apps of its unit Be A Part Of, per BigCommerce; the keys were abused Sept 13-17, 2026 against merchant stores. Fastr made no public comment.
