Southern Company, the Atlanta-based energy holding giant, has confirmed that an unauthorized third party broke into its online customer portal and accessed account information belonging to roughly 400,000 customers across its electric subsidiaries, Georgia Power, Alabama Power, and Mississippi Power.
The company publicly disclosed the breach on October 5, 2026, stating that the intrusion, which occurred in September, was detected through its own monitoring systems. Upon discovery, Southern Company said it moved quickly to shut down the unauthorized access and notified law enforcement.
"Southern Company recently detected suspicious activity involving our online customer portal," the company said in a statement. "An unauthorized third party accessed certain, limited information about the accounts of approximately 400K customers. Upon detection, we took immediate steps to stop the activity and have engaged law enforcement."
Of the roughly 400,000 accounts compromised, approximately 300,000 belong to Georgia Power customers. Alabama Power accounts for the remaining 100,000, which represents about 6% of its 1.6 million-customer base. Mississippi Power was named in the company's public notice as affected, but Southern Company has not released a customer count for that subsidiary.
According to the company's published incident notice, the data the attacker accessed includes customers' names, mailing addresses, phone numbers, email addresses, and the last four digits of their Social Security numbers, along with other unspecified basic account details. The company was clear about what was not taken: bank account numbers, payment card numbers, and driver's license numbers were not part of what the attacker pulled from the portal.
The online portal in question is the same platform customers use to pay bills and manage their accounts.
Despite the company's confirmation that it caught and stopped the intrusion, Southern Company has not said when exactly in September the breach occurred, nor has it explained how the attacker got past the portal's defenses in the first place. That absence of technical detail leaves open questions about the attack method, whether it involved stolen credentials, a software vulnerability, or some other approach.
Customers whose information was involved are being notified directly by both mail and email. Southern Company is also offering each affected customer one year of free credit monitoring through Equifax. Those with additional questions were directed to a dedicated assistance line at 1-800-900-6021, available Monday through Friday.
Southern Company, incorporated in 1945 and headquartered in Atlanta, is one of the largest energy holding companies in the United States. It supplies electricity through its subsidiaries to customers across three states and operates natural gas distribution businesses in four more. Its total customer base numbers over 9 million.
The incident sits alongside a string of recent cyberattacks targeting utility companies in North America and beyond. Just weeks earlier, in September 2026, Houston-based CenterPoint Energy disclosed that an unauthorized third party had obtained personal information on a portion of its customers through one of the company's external-facing systems. That disclosure came after a threat actor claimed on a cybercrime forum to have extracted 7.49 million customer records from the utility and ultimately leaked the data after the company failed to respond. In March 2025, Nova Scotia Power, Canada's largest electric utility in that province, suffered a cyberattack that disrupted its customer support line and web portal.
Research published by cybersecurity firm Trustwave in 2025 found that roughly 67% of credential access techniques used against energy and utilities companies involved brute force methods, which are largely automated attacks that cycle through large lists of usernames and passwords. That tactic, known as credential stuffing when it draws on passwords stolen from previous breaches on other platforms, has been used against utility customer portals before. In 2021, UK energy supplier Npower had to shut down its mobile app entirely after attackers used stolen credentials from other websites to access thousands of customer accounts.
The energy sector's digital attack surface has expanded considerably as utilities push more customer services online. Customers log into portals to check bills, set up autopay, and track usage, all of which requires storing personal data behind web-based logins. Security researchers have long pointed out that these portals often receive less security investment than back-end operational systems, even though they handle data that is directly useful for phishing, identity fraud, and social engineering.
Southern Company said it has found no evidence of ongoing unauthorized access following the breach, and noted that it continues to monitor its systems around the clock. The company's public notice also cautioned customers to be alert for fraudulent contact from individuals claiming to be Georgia Power or Alabama Power representatives, reminding them that neither utility will ever threaten immediate service disconnection or demand payment over the phone.
Anyone who believes they may have been affected and has not yet received notification from the company can contact Georgia Power customer service directly through the number listed on their bill.
The company had earlier disclosed that its corporate IT infrastructure had been compromised by hackers. The cyber extortion group ShinyHunters later claimed responsibility for the attack, alleging it had obtained around 9 million records containing personally identifiable information (PII) and internal corporate data.
According to the notification shared by the company, “On April 15, 2026, Medtronic became aware of unusual activity on certain corporate IT systems.”
The notice further states, “Medtronic launched an investigation with the assistance of leading third-party cybersecurity experts to determine the impact and scope of the incident.”
Following the investigation, the company concluded that “The investigation determined that from April 13 to April 19, 2026, an unauthorized actor accessed certain Medtronic corporate IT systems.”
The information that may have been exposed includes:
Full name
Contact information
Date of birth
Social Security number
Health-related information
ShinyHunters is known for publishing stolen information when ransom demands are not met. The group reportedly added Medtronic to its dark web leak site on April 18, claiming it possessed more than 9 million records and warning that the data would be released if a ransom was not paid by April 21.
However, the listing disappeared from the group's portal later that month. In its customer notification, Medtronic clarified that the compromised data has not been made publicly available online.
Medtronic operates in over 150 countries and employs approximately 95,000 people, generating annual revenue of around $33.5 billion.
Despite the breach involving customer information, the company has reassured users that its medical devices continue to operate safely and were not impacted by the cybersecurity incident.
Customers receiving breach notifications are being encouraged to enroll in the company's complimentary 24-month credit monitoring and identity theft protection program to reduce potential risks.
The company has also advised affected individuals to stay alert for suspicious emails, messages, or calls that could exploit the exposed information for phishing, social engineering, or other fraudulent activities. Customers are also encouraged to regularly review their account activity for any signs of unauthorized access.
Addressing the incident, a company spokesperson told BleepingComputer, "A few weeks ago, Tata Electronics identified a cybersecurity incident on some of our systems," adding, "Our response protocols were deployed immediately, and the incident has had no impact on our operations across businesses, which remain unaffected."
Tata Electronics, a subsidiary of the Tata Group, specializes in semiconductor production and electronic component manufacturing. Established in 2020, the company has rapidly expanded its footprint in India's technology manufacturing sector and is currently involved in the production and assembly of Apple iPhones and related components.
While the company has not identified the threat actor behind the attack, its statement follows claims made by the World Leaks cybercrime group, which allegedly published data stolen from Tata Electronics.
According to reports, the leaked material includes folders and documents that purportedly contain manufacturing-related information linked to Apple products. The exposed files are said to feature internal component schematics, printed circuit board (PCB) designs, material specifications, and software development kit (SDK) files.
BleepingComputer has reportedly reached out to Apple for clarification regarding the alleged exposure of proprietary information but has not yet received a response.
World Leaks is widely believed to be the successor to the Hunters International ransomware operation, which ceased activities in July 2025. Unlike its predecessor, which encrypted victims' systems, World Leaks focuses solely on data theft and extortion, threatening to release stolen information publicly unless demands are met.
The group has previously been linked to attacks on several major organizations. Among its notable victims are Dell, which confirmed a cybersecurity breach in July 2025, and Nike, which initiated an investigation after cybercriminals claimed to have stolen 1.4 terabytes of company data in January 2026.