Comcast Xfinity Breached via CitrixBleed; 35M Customers Affected

The now-infamous CitrixBleed vulnerability has claimed possibly its biggest kill yet: 35 million customers of Comcast Xfinity.
Since at least August, attackers have been exploiting CVE-2023-4966, a 7.5 high-severity vulnerability affecting Citrix Systems' NetScaler ADC and Gateway networking products.
Even after it was brought to light in October, many organizations have struggled to comprehensively shore up their systems.
One such organization appears to be Comcast Xfinity.
On Monday, the cable giant disclosed a CitrixBleed-enabled breach of its customer data, including usernames and hashed passwords, and, for some, names, contact information, last four digits of Social Security numbers, dates of birth, and security questions and answers.
What Happened in the Comcast Data Breach Citrix first disclosed and released a patch for CitrixBleed on Oct. 10, with additional guidance for affected customers following a week and two weeks thereafter.
The company fell victim to a breach through Citrix lasting from Oct. 16 to 19.
Xfinity did not explain this discrepancy in its response to an inquiry from Dark Reading.
In those three days, it seems, attackers were able to exfiltrate much of the data Xfinity has about its customers.
A disclosure filed with the Maine Attorney General's Office reveals the full extent of the damage: 35,879,455 individuals affected.
All Xfinity customers will be prompted to reset their passwords upon their next login attempts.
Some customers had already received the prompt days before Monday's disclosure.
Last month, ReliaQuest identified five active threat groups, including the LockBit ransomware gang, still picking at it.
He also notes a rumor that ransomware groups have passed around a Python script that automates the entire attack chain.


This Cyber News was published on www.darkreading.com. Publication date: Tue, 19 Dec 2023 23:00:06 +0000


Cyber News related to Comcast Xfinity Breached via CitrixBleed; 35M Customers Affected

Comcast Xfinity Reports Data Breach Exposing Info About 35M Customers - PRESS RELEASE. MARLTON, N.J., Dec. 19, 2023 /PRNewswire/ - Approximately 35 million consumers are being notified that their confidential information was compromised due to a vulnerability in software created by Citrix and used by Xfinity. The data ...
10 months ago Darkreading.com
Comcast Xfinity Breached via CitrixBleed; 35M Customers Affected - The now-infamous CitrixBleed vulnerability has claimed possibly its biggest kill yet: 35 million customers of Comcast Xfinity. Since at least August, attackers have been exploiting CVE-2023-4966, a 7.5 high-severity vulnerability affecting Citrix ...
10 months ago Darkreading.com
Comcast's Xfinity Breached: Data of 36 Million Users Exposed - Citrix bugs caused a lot of problems throughout the year, and as we're closing down 2023, it seems it's not over. This time, Xfinity, Comcast's cable television and internet division has been the victim of a data breach caused by the Citrix bug. ...
10 months ago Heimdalsecurity.com
Xfinity Customer Data Compromised in Attack Exploiting CitrixBleed Vulnerability - Comcast's Xfinity is informing customers that their information has been compromised in a cyberattack that involved exploitation of the vulnerability known as CitrixBleed. CitrixBleed, officially tracked as CVE-2023-4966, is a critical vulnerability ...
10 months ago Securityweek.com
Xfinity Customer Data Compromised in Attack Exploiting CitrixBleed Vulnerability - Comcast's Xfinity is informing customers that their information has been compromised in a cyberattack that involved exploitation of the vulnerability known as CitrixBleed. CitrixBleed, officially tracked as CVE-2023-4966, is a critical vulnerability ...
10 months ago Packetstormsecurity.com
Xfinity Data Breach Impacts 36 Million Individuals - The data breach disclosed recently by Comcast's Xfinity impacts nearly 36 million individuals, the company told US authorities. The incident was disclosed by the telecommunications and smart home solutions provider on December 18, when it admitted ...
10 months ago Securityweek.com
Xfinity Rocked with Data Breach Impacting 36 Million Users - LLC, operating under the brand name Xfinity, has suffered a massive data breach affecting 36 million users. Comcast-owned brand Xfinity has initiated the process of notifying its customers about a significant data breach impacting tens of millions of ...
10 months ago Hackread.com
Comcast-Owned Telcom Business 'Xfinity' Suffers Data Breach - Comcast-owned Xfinity has suffered a major data breach, affecting more than 25 million of its customers. This intrusion not only demonstrates a risky and expanding practice among hackers, but it has also greatly increased the vulnerability of ...
10 months ago Cysecurity.news
Millions of Xfinity customers' hashed passwords, info stolen The Register - Millions of Comcast Xfinity subscribers' personal data - including potentially their usernames, hashed passwords, contact details, and secret security question-answers - was likely stolen by one or more miscreants exploiting Citrix Bleed in October. ...
10 months ago Go.theregister.com
Xfinity discloses data breach after recent Citrix server hack - Doing business as Xfinity, disclosed on Monday that attackers who breached one of its Citrix servers in October also stole customer-sensitive information from its systems. On October 25, roughly two weeks after Citrix released security updates to ...
10 months ago Bleepingcomputer.com
Comcast Wants a Slice of the Enterprise Cybersecurity Business - Telco and media conglomerate Comcast has jumped headfirst into the enterprise cybersecurity business, betting that its internal security tools and inventions can find traction in an expanding marketplace. "The Philadelphia technology giant has ...
1 year ago Securityweek.com
36 million people affected by data breach at Xfinity - Cable TV and internet service provider Xfinity says a breach linked to a widespread vulnerability in Citrix technology exposed data of about nearly 36 million people in mid-October. The intrusion happened between October 16-19, after Citrix had ...
10 months ago Therecord.media
Citrix Bleed leveraged to steal data of 35+ million Comcast Xfinity customers - Telecommunications company Comcast has confirmed a breach that exposed personal information of more than 35.8 million of Xfinity customers. CVE-2023-4966 - an information disclosure vulnerability in Citrix NetScaler ADC/Gateway devices - was ...
10 months ago Helpnetsecurity.com
FCC orders telecom carriers to report PII data breaches within 30 days - Starting March 13th, telecommunications companies must report data breaches impacting customers' personally identifiable information within 30 days, as required by FCC's updated data breach reporting requirements. FCC's final rule follows several ...
8 months ago Bleepingcomputer.com
Teens with "digital bazookas" are winning the ransomware war, researcher laments - What do Boeing, an Australian shipping company, the world's largest bank, and one of the world's biggest law firms have in common? All four have suffered cybersecurity breaches, most likely at the hands of teenage hackers, after failing to patch a ...
11 months ago Arstechnica.com
Xfinity Discloses Data Breach Impacting Nearly 36 Million - Comcast Cable's Xfinity brand has revealed a major data breach impacting 35.9 million customers, that resulted from exploitation of a Citrix vulnerability. Reports suggested that the vulnerability had been exploited in the wild as far back as August ...
10 months ago Infosecurity-magazine.com
Week in review: Terrapin SSH attack, Mr. Cooper breach - Creating a formula for effective vulnerability prioritizationIn this Help Net Security interview, Michael Gorelik, CTO and Head of Malware Research at Morphisec, provides insights into the business impact of vulnerabilities. EMBA: Open-source ...
10 months ago Helpnetsecurity.com
The Fallout from "CitrixBleed" - On December 18, 2023, Comcast Xfinity filed a notice to the Attorney General of Maine disclosing an exploited vulnerability in one of Xfinity's software providers, Citrix, that has jeopardized almost 36 million customers' sensitive information. While ...
10 months ago Cybersecurity-insiders.com
98% of Firms Have a Supply Chain Relationship That Has Been Breached: Analysis - The digital supply chain is probably more extensive and more complicated than you realize. Upward of 98% of organizations have a relationship with at least one third party that has experienced a breach in the last two years - and these figures are ...
1 year ago Securityweek.com
Identity Crisis: 14 Million Individuals at Risk After Mortgage Lender's Data Breach - Mr Cooper, the private mortgage lender, has now admitted almost 14.7 million individuals' private data has been stolen in a previous IT security breach, which resulted in the theft of their addresses and bank account numbers, but it is estimated the ...
10 months ago Cysecurity.news
T-Mobile Data Breach Affects 37 Million Customers: What You Should Know - T-Mobile recently announced that a data breach of its API had impacted the personal records of over 37 million customers. The breach occurred on the T-Mobile website, and could have allowed unauthorized users to access customer data such as name, ...
1 year ago Heimdalsecurity.com
Mortgage giant Mr. Cooper hit by cyberattack impacting IT systems - U.S. mortgage lending giant Mr. Cooper was breached in a cyberattack that caused the company to shut down IT systems, including access to their online payment portal. Mr. Cooper is a mortgage lending company based out of Dallas, Texas, that employs ...
11 months ago Bleepingcomputer.com
BlackCat claims attack on Fidelity National Financial The Register - Fortune 500 insurance biz Fidelity National Financial has confirmed that it has fallen victim to a "Cybersecurity incident." The services we provide related to title insurance, escrow and other title-related services, mortgage transaction services, ...
11 months ago Theregister.com
Accelerating Your Journey to the 128-bit Universe - The 2023 National Cybersecurity Strategy requires acceleration of your agency's mission to go boldly into the 128-bit address space universe with greater speed and urgency. IPv6-only is the addressing standard for the U.S. Federal Government, ...
11 months ago Feedpress.me
Cohesity partners with NVIDIA to harness the power of generative AI - Cohesity announced a collaboration with NVIDIA to help organizations safely unlock the power of generative AI and data using the recently announced NVIDIA NIM microservices and by integrating NVIDIA AI Enterprise into the Cohesity Gaia platform. ...
7 months ago Helpnetsecurity.com

Latest Cyber News


Cyber Trends (last 7 days)


Trending Cyber News (last 7 days)