Krebs on Security

APRIL 11, 2024

New York City based Sisense has more than 1,000 customers across a range of industry verticals, including financial services, telecommunications, healthcare and higher education. ” “We are taking this matter seriously and promptly commenced an investigation,” Dash continued.

CISO 322

CISO Encryption Telecommunications Financial Services 322

Security Affairs

DECEMBER 30, 2020

T-Mobile has disclosed a data breach exposing customers’ account’s information. The T-Mobile security staff discovered “malicious, unauthorized access” to their systems. T-Mobile discovered that the attackers had access to the CPNI (Customer Proprietary Network Information).

Data breaches 144

Data breaches Mobile Telecommunications Accountability 144

Security Affairs

FEBRUARY 27, 2021

The telecommunications giant T-Mobile disclosed a data breach after some of its customers were apparently affected by SIM swap attacks. The telecommunications provider T-Mobile has disclosed a data breach after it became aware that some of its customers were allegedly victims of SIM swap attacks.

Mobile 131

Mobile Data breaches Telecommunications Accountability 131

Security Affairs

MARCH 27, 2025

Arkana Security, a new ransomware group, claims to have breached the telecommunications provider WideOpenWest (WOW!). The new ransomware group Arkana Security claims to have hacked US telecom provider WOW!, is a US-based telecommunications company that provides broadband internet, cable TV, and phone services.

Hacking 75

Hacking Telecommunications Data breaches Internet 75

Security Affairs

MARCH 5, 2020

A data breach notification published by the telecommunications giant on its website revealed that the security breach impacted both employees and customers. T-Mobile confirmed that some of these accounts accessed by the hackers contained account information for its customers and employees.

Mobile 145

Mobile Data breaches Telecommunications Wireless 145

The Hacker News

OCTOBER 5, 2022

Australia's largest telecommunications company Telstra disclosed that it was the victim of a data breach through a third-party, nearly two weeks after Optus reported a breach of its own. There has been no breach of Telstra's systems," Narelle Devine, the company's chief information security officer for the Asia Pacific region, said.

Data breaches 105

Data breaches Telecommunications Information Security Accountability 105

Security Affairs

MARCH 24, 2025

China-linked APT Weaver Ant infiltrated the network of a telecommunications services provider for over four years. During a forensic investigation, Sygnia researchers observed multiple alerts that revealed a re-enabled threat actor account by a service account from an unidentified server.

Telecommunications 64

Telecommunications Encryption Accountability Firewall 64

Security Affairs

MARCH 23, 2022

Microsoft has now confirmed that the attackers have compromised the account of one of its employees gaining limited access to source code repositories. Our investigation has found a single account had been compromised, granting limited access. No customer code or data was involved in the observed activities. Pierluigi Paganini.

Accountability 103

Accountability VPN Social Engineering Hacking 103

Security Affairs

JANUARY 20, 2023

Bad news for T-Mobile, the company disclosed a new data breach that resulted in the theft of data belonging to 37 customer accounts. T-Mobile suffered a new data breach, threat actor stole the personal information of 37 million current postpaid and prepaid customer accounts.

Data breaches 98

Data breaches Mobile Accountability Telecommunications 98

Security Affairs

FEBRUARY 23, 2024

Australian telecommunications provider Tangerine disclosed a data breach that impacted roughly 230,000 individuals. Tangerine suffered a data breach that exposed the personal information of roughly 230,000 individuals. The telco notified the Australian Cyber Security Centre and the Office of the Australian Information Commissioner. 

Data breaches 129

Data breaches Telecommunications Banking Mobile 129

The Last Watchdog

APRIL 13, 2022

The Russian government, military, and intelligence service may wish to achieve some operational effect, for example, disrupting the power grid or interfering with telecommunications infrastructure, which may be part of a larger war plan. Accounting for humans. Each of these organizations performs cyber operations for various reasons.

Cybersecurity 214

Cybersecurity Cybercrime Education Government 214

Security Affairs

JULY 10, 2021

Mint Mobile discloses a data breach, an unauthorized attacker gained access to subscribers’ account information and ported phone numbers. Mint Mobile is an American telecommunications company which sells mobile phone services and operates as an MVNO on T-Mobile’s cellular network in the United States.

Mobile 143

Mobile Data breaches Telecommunications Passwords 143

Security Affairs

OCTOBER 5, 2022

Bad news for the Australian telecommunications industry, the largest company in the country Telstra suffered a data breach. Australia’s largest telecommunications company Telstra disclosed a data breach through a third-party supplier. It seems that the security breach also impacted other companies.

Data breaches 98

Data breaches Telecommunications Accountability Information Security 98

Security Affairs

MARCH 30, 2024

AT&T initially denied any data breach, below is the statement from the telecomunication giant : “Based on our investigation Thursday, the information that appeared in an internet chat room does not appear to have come from our systems,” On Saturday, the telecommunications company retracted its initial denial and confirmed the data breach.

Data breaches 144

Data breaches Telecommunications Cybercrime Hacking 144

Security Affairs

OCTOBER 7, 2024

Telecommunications giant Comcast is notifying approximately 238,000 customers impacted by the Financial Business and Consumer Solutions (FBCS) data breach. FBCS, a third-party debt collection agency, collects personal information from its clients to facilitate debt collection activities on behalf of those clients.

Data breaches 129

Data breaches Telecommunications Ransomware Accountability 129

Security Affairs

JANUARY 7, 2024

The group targets government entities, Kurdish (political) groups like PKK, telecommunication, ISPs, IT-service providers (including security companies), NGO, and Media & Entertainment sectors; Over the years, the group enhanced its evasion capabilities. Enable 2FA on all externally exposed accounts.

Media 138

Media Accountability Telecommunications Government 138

Security Affairs

NOVEMBER 22, 2019

The US branch of the telecommunications giant T -Mobile disclosed a security breach that according to the company impacted a small number of customers of its prepaid service. The cybersecurity team at T-Mobile discovered an unauthorized access to information associated with a limited number of its prepaid wireless account customers.

Wireless 136

Wireless Data breaches Mobile Telecommunications 136

Security Affairs

DECEMBER 1, 2024

Soldier Major cybercrime operation nets 1,006 suspects UK hospital network postpones procedures after cyberattack Tether Has Become a Massive Money Laundering Tool for Mexican Drug Traffickers, Feds Say Florida Telecommunications and Information Technology Worker Sentenced for Conspiring to Act as Agent of Chinese Government Rockstar 2FA: A Driving (..)

Cybercrime 69

Cybercrime Firewall Ransomware Social Engineering 69

Security Affairs

AUGUST 18, 2021

million current postpaid customer accounts, as well as more than 40 million records of former and prospective customers. Importantly, no phone numbers, account numbers, PINs, passwords, or financial information were compromised in any of these files of customers or prospective customers.” Pierluigi Paganini.

Data breaches 101

Data breaches Mobile Telecommunications Accountability 101

Security Affairs

MARCH 18, 2022

CrowdStrike researchers reported that at least 13 telecommunication companies were compromised by the group since 2019. The group hacked mobile telephone networks around the globe and used specialized tools to access calling records and text messages from telecommunications companies. ” concludes the report.

Banking 143

Banking Telecommunications System Administration Hacking 143

Security Affairs

APRIL 10, 2024

AT&T initially denied any data breach, below is the statement from the telecomunication giant : “Based on our investigation Thursday, the information that appeared in an internet chat room does not appear to have come from our systems,” Later, the telecommunications company retracted its initial denial and confirmed the data breach.

Data breaches 124

Data breaches Telecommunications Identity Theft Hacking 124

Security Affairs

MARCH 25, 2024

sender account. “Additionally, this campaign is the first time Proofpoint has observed TA450 using a sender email account that matches the lure content. For example, this campaign used an email account of salary[@]<compromisedorg>co[.]il, Some of the messages were also sent using a likely a compromised.IL

Phishing 136

Phishing Social Engineering Telecommunications Accountability 136

Security Affairs

JUNE 8, 2022

China-linked threat actors have breached telecommunications companies and network service providers to spy on the traffic and steal data. US NSA, CISA, and the FBI published a joint cybersecurity advisory to warn that China-linked threat actors have breached telecommunications companies and network service providers.

Telecommunications 100

Telecommunications Authentication Passwords Accountability 100

Security Affairs

MAY 4, 2025

CISA adds Yii Framework and Commvault Command Center flaws to its Known Exploited Vulnerabilities catalog Ireland’s DPC fined TikTok 530M for sending EU user data to China Microsoft sets all new accounts passwordless by default Luxury department store Harrods suffered a cyberattack U.S.

Cyber Attacks 70

Cyber Attacks Cybercrime Malware Phishing 70

Security Affairs

MARCH 16, 2020

Hackers have stolen O2 customers’ data from a database run by Aerial Direct , one of the largest UK partners of the telecommunications services provider. “We recently became aware that some of our customers’ personal information stored on one of our databases has been accessed without permission.

Data breaches 138

Data breaches Telecommunications Passwords Advertising 138

Security Affairs

DECEMBER 6, 2021

NOBELIUM focuses on government organizations, non-government organizations (NGOs), think tanks, military, IT service providers, health technology and research, and telecommunications providers. The Nobelium cyberspies is using a new custom downloader tracked by the researchers as CEELOADER.

Malware 131

Malware VPN Accountability Telecommunications 131

Security Affairs

SEPTEMBER 5, 2021

Vocus provides retail, wholesale and corporate telecommunications services across Australia and New Zealand. Please contact your account manager if you are unable to connect.” A massive DDoS hit Vocus ISP, New Zealand ‘s third-largest internet operator, isolating parts of the country from the Internet.

DDOS 130

DDOS Internet Internet Telecommunications 130

Security Affairs

AUGUST 31, 2021

ProxyToken is a serious vulnerability in Microsoft Exchange Server that could allow unauthentication attackers to access emails from a target account. The issue could be exploited by an unauthenticated attacker to access emails from a target account. An attacker can leverage this vulnerability to disclose information from the server.”

Authentication 111

Authentication Accountability Telecommunications Information Security 111

Security Affairs

MARCH 10, 2023

AT&T is notifying millions of customers that some of their information was exposed after a third-party vendor was hacked. CPNI is information related to the telecommunications services purchased by the customers, including the number of lines for each account or the wireless plan to which customers are subscribed.

Data breaches 98

Data breaches Hacking Wireless Telecommunications 98

Security Affairs

JANUARY 30, 2024

As an example of compromised accounts, Resecurity outlined exposed access credentials belonging to a major data center and one of the largest vendors providing international-scale network telephony connectivity to governmental and national telecom providers in Africa.

Engineering 139

Engineering Passwords Telecommunications Accountability 139

Security Affairs

FEBRUARY 22, 2022

Once obtained the data, crooks used it to empty their victims’ bank accounts. “Users entered bank card details on phishing sites in order to top up their mobile account or make a transfer. Thus, the attacker received payment information from more than 70 thousand people. 190 (Fraud) of the Criminal Code of Ukraine.

Phishing 101

Phishing Banking Mobile Telecommunications 101

SecureList

DECEMBER 12, 2023

To find out, in 2022 we created a list of 700 companies worldwide from different industries: industrial, telecommunication, financial, retail, and others. According to the source of origin, we divide all compromised accounts into three categories: Public leakages that are freely distributed within cybercriminal society.

Data breaches 129

Data breaches Accountability Telecommunications Malware 129

eSecurity Planet

SEPTEMBER 21, 2024

Each of these regulations addresses different aspects of cybersecurity and data protection, making it essential for businesses and organizations to stay informed and proactive. The act also requires institutions to allow customers to opt out of having their information shared with non-affiliated third parties.

Cybersecurity 121

Cybersecurity Computers and Electronics Cyber threats Healthcare 121

Security Affairs

MAY 21, 2020

The APT group targets telecommunication and travel industries in the Middle East to gather intelligence on Iran’s geopolitical interests. The Chafer APT group has distributed data stealer malware since at least mid-2014, it was focused on surveillance operations and the tracking of individuals.

Government 124

Government Social Engineering Hacking Advertising 124

Security Affairs

OCTOBER 22, 2023

North Korea-linked APT groups actively exploit JetBrains TeamCity flaw Multiple APT groups exploited WinRAR flaw CVE-2023-38831 Californian IT company DNA Micro leaks private mobile phone data Threat actors have been exploiting CVE-2023-4966 in Citrix NetScaler ADC/Gateway devices since August A flaw in Synology DiskStation Manager allows admin account (..)

Ransomware 121

Ransomware Data breaches Telecommunications Mobile 121

Security Affairs

DECEMBER 24, 2022

The Raspberry Robin worm attacks aimed at telecommunications and government office systems across Latin America, Australia, and Europe. Researchers from Trend Micro have uncovered a Raspberry Robin worm campaign targeting telecommunications and government office systems across Latin America, Australia, and Europe.

Government 98

Government Malware Telecommunications Cybercrime 98

Security Affairs

JUNE 9, 2024

Last week, the RansomHub ransomware group claimed to have stolen the information of over 2 million customers from the American telecommunications company Frontier Communications. The RansomHub group claimed to have stolen 5GB of data from the telecommunications giant. concludes the letter reads.

Data breaches 100

Data breaches Identity Theft Telecommunications Cybercrime 100