Citrix has released updates to address two security flaws impacting NetScaler ADC and NetScaler Gateway deployments, including a critical-severity authentication bypass vulnerability. According to the cloud computing and virtualization technology company, the issues affect customer-managed NetScaler ADC and NetScaler Gateway, including certain FIPS and NDcPP builds, as well as SecurAccess
A now-patched security flaw impacting Zimbra Collaboration (ZCS) has come under active exploitation in the wild, according to the Polish Computer Emergency Response Team (CERT Polska). The vulnerability in question is CVE-2026-73570 (CVSS score: 8.9), which refers to a case of command injection that can lead to remote code execution. "A remote code execution vulnerability exists in Zimbra
Researchers at the University of Massachusetts Amherst have demonstrated an attack that revives expired Visa contactless credit cards for real in-store purchases by rewriting the expiration date a point-of-sale (POS) terminal reads over near-field communication (NFC), without breaking any of the card's cryptography. The attack, which the researchers named "Zombie Card," requires physical
In March 2026, an internal AI agent at Meta triggered a “Sev 1” incident after sensitive company and user data was exposed to employees who weren’t authorized to access it. The incident began when a Meta employee posted a technical question on an internal forum. An engineer used an approved AI agent to analyze it, but the agent posted its response publicly without approval. The employee
Cybersecurity researchers have disclosed two denial-of-service (DoS) attacks that exploit how major content delivery networks (CDNs) convert client-facing HTTP/3 traffic into HTTP/1.1 requests to the websites they front, amplifying a low-bandwidth request stream by up to 350x against the origin server. The attacks, collectively named "CDN Tsunami," were evaluated against Alibaba, Baidu,
A suspected ransomware affiliate is posing as a ransomware recovery service called "Ransom Busters," contacting victims before the attacks become public and claiming it can provide decryption keys and delete stolen data for a fee. GuidePoint Security's Research and Intelligence Team (GRIT) disclosed this activity after responding to several recent ransomware attacks in which victims received emails from Ransom Busters offering to help recover from the attack. The messages were suspicious because they were sent to victims before the attacks became public, raising questions about how they knew about the cyberattacks in the first place. Ransom Busters claimed it exploited vulnerabilities in administrative panels used by ransomware-as-a-service (RaaS) operations, giving it access to encryption keys and data stolen from victims.
A suspected ransomware affiliate is posing as a ransomware recovery service called "Ransom Busters," contacting victims before the attacks become public and claiming it can provide decryption keys and delete stolen data for a fee. GuidePoint Security's Research and Intelligence Team (GRIT) disclosed this activity after responding to several recent ransomware attacks in which victims received emails from Ransom Busters offering to help recover from the attack. The messages were suspicious because they were sent to victims before the attacks became public, raising questions about how they knew about the cyberattacks in the first place. Ransom Busters claimed it exploited vulnerabilities in administrative panels used by ransomware-as-a-service (RaaS) operations, giving it access to encryption keys and data stolen from victims.
Japanese cloud and data center service provider Sakura Internet disclosed that hackers accessed its sales management system, where customer contract and membership information is stored. In an update today to the initial notification from Monday, the company says the incident may have impacted up to 1,360,563 member accounts. However, as the investigation continues, the exact number of affected accounts remains to be determined. Sakura Internet is a major Japanese digital infrastructure company providing web hosting, VPS, public cloud, data-center, and GPU computing services. It has been selected as a domestic provider for Japan’s Government Cloud program, making it a strategic entity in the country that reduces dependence on foreign hyperscalers. According to the firm’s announcement, hackers accessed its IT system on August 9. The incident was discovered later during the investigation of a separate breach at the Sakura Rental Server service.
In a large-scale campaign that researchers dubbed CameraSwarm, hackers compromised more than 14,500 Dahua IP cameras mostly in Ukraine and Russia. The operation ran for at least 35 days between June 17 and July 22, compromising devices by exploiting vulnerabilities, brute-forcing logins, and using offline recovery codes from serial numbers for cloud-registered cameras. Researchers at threat intelligence company Hunt.io discovered the campaign after finding a working directory on an HTTP server that the operator left unprotected. Hunt.io recovered 407 MB of data comprising 2,616 files across 234 directories, including source code, logs, credentials, captured camera images, shell history, and exploitation results, which helped them map an impressive operation. According to their findings, the 35-day CameraSwarm campaign compromised 14,530 Dahua IP cameras using three attack methods in parallel:
U.S. cybersecurity agencies warn that threat actors are using AI-generated scripts to exploit Siemens S7 Series programmable logic controllers (PLCs) in U.S. critical infrastructure. PLCs are industrial computers used to automate and control machinery and physical processes in factories and other critical infrastructure. The NSA, CISA, FBI, Department of Energy, and Environmental Protection Agency issued the joint advisory Wednesday, saying the attacks are ongoing. "This advisory relates to an active threat to Siemens S7 Series programmable logic controllers (PLCs)," reads the advisory. "However, ongoing PLC targeting activity is broader than Siemens PLCs. All PLC owners and operators should apply relevant mitigations to reduce the risk to their devices and systems." The critical infrastructure sectors most targeted include Critical Manufacturing, Energy, Water and Wastewater Systems, Chemical, Food and Agriculture, and Commercial Facilities. The agencies also note that Siemens S7 PLCs are used in the Defense Industrial Base, which could also be targeted.
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