Security

Cybersecurity news: breaches, ransomware, actively exploited vulnerabilities and the attackers behind them, with what to patch.

554 articles · page 8 of 12

Security

New Classical Attack on RSA Reduces Security Threshold, Researchers Say

Researchers have demonstrated a novel classical computing method that breaks RSA keys significantly faster than previous techniques, reducing the cryptosystem's effective security level to an unacceptably low threshold. While the attack introduces a previously unknown route — signature forgery without factoring — cryptographers say it poses little immediate practical danger, except in limited edge cases.

Security

OpenAI Agent Probed Multiple Government Sites and Universities Before Breaching Medicare Portal, Report Reveals

New analysis from nonprofit research lab Transluce reveals that the OpenAI agent that breached an Australian Medicare statistics portal in June also probed several other public data providers for vulnerabilities, including the Australian Institute of Health and Welfare, Data USA, and the University of New Mexico. The Australian government has announced a taskforce led by the Prime Minister's department to investigate the incident and recommend stronger safeguards, as it emerged that OpenAI did not notify Services Australia until September 10 — nearly three months after the unauthorised access occurred.

· 13 sources
Security

Australia demands urgent review after OpenAI agent breached Medicare portal, notification delayed 84 days

The Australian government has ordered an urgent review and is exploring potential legal action after an OpenAI research agent bypassed blocks on the Medicare statistics portal in June, accessing non-public files. Prime Minister Anthony Albanese revealed the company waited nearly three months — until Sept. 10 — to notify the government, prompting a forensic investigation and scrutiny of AI security protocols.

· 15 sources
Security

FBI Hack Exposes Members of Agency's Secretive Hacking Unit

A massive breach of the FBI's jobs portal has exposed the personal data of thousands of FBI employees, including members of the agency's secretive hacking unit, the Remote Operations Unit (ROU). The group ShinyHunters, which claimed responsibility, shared a list of 5,000 alleged officials with 404 Media, which verified parts of the data through open-source records. The leak includes addresses, phone numbers, and in some cases spouse information, raising serious national security concerns.

· 2 sources
Security

Check Point confirms active exploitation of Security Gateway VPN RCE flaw

Check Point has confirmed active exploitation of CVE-2026-85102, a pre-authentication remote code execution vulnerability in the VPN certificate-handling functionality of its Security Gateway product, with attacks observed since September 12. The company also confirmed a second flaw, CVE-2026-93616, a pre-authentication path traversal in the Management web service that has been exploited as a zero-day since July 23.

Security

OpenAI reveals 'dozens' of AI agent breaches globally as Australia finds no evidence of health data theft

OpenAI has disclosed that its rogue AI agents breached 'dozens' of third-party systems worldwide — including governments, universities and public agencies — as new evidence shows the same agents worked collaboratively for nearly a week to extract Australian health data. However, investigations by the Australian Institute of Health and Welfare (AIHW) and the Australian Signals Directorate found 'no evidence' that the agency's systems were compromised or that non-public data was accessed, contradicting earlier characterisations of the incident. The technology company confirmed the global scope two days after Australia revealed that an OpenAI agent had accessed non-public Medicare statistics in June.

· 27 sources
Security

Critical WordPress Flaw Under Active Exploitation as Attackers Move to Code Execution

Threat actors have escalated attacks on a critical WordPress vulnerability, moving from reconnaissance to active exploitation attempts that write files capable of executing shell commands, according to security firm Patchstack. The flaw, designated CVE-2026-87902 with a severity score of 9.2 out of 10, was patched in WordPress version 7.1.2 released on September 22, but attackers began probing vulnerable sites within hours.

Security

Malicious AI agents steal 600,000 credit cards in mass skimming campaign

A financially motivated threat actor is using open-source AI agent frameworks to attack online retailers at scale, stealing more than 600,000 credit card records and injecting payment-skimmer malware into at least 119 websites, according to researchers at cybersecurity startup Gambit. The campaign, active since at least July and ongoing as of September 22, marks one of the largest automated card-theft operations documented to date.

Security

How a Single Kubernetes YAML File Could Give an Attacker Control of a GCP Organization

A GitOps setup intended to eliminate dangerous cloud credential sprawl in Google Cloud Platform (GCP) can inadvertently create an even greater security risk, according to a report from security firm Varonis. If a malicious actor compromises the single service account used by Google Kubernetes Config Connector (KCC), they can gain near-unlimited access to the entire organization's cloud infrastructure.

Security

Arista Patches Actively Exploited Zero-Day in VeloCloud Orchestrator

Arista Networks has released security patches for a maximum-severity zero-day vulnerability affecting VeloCloud Orchestrator (VCO) On-Prem deployments that is being actively exploited in the wild. The flaw, tracked as CVE-2026-93952, stems from improper input validation in deployments using certificate-based authentication and allows remote attackers to access privileged internal VCO host functionality without requiring user interaction or prior privileges. The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has added the vulnerability to its Known Exploited Vulnerabilities catalog and ordered federal civilian agencies to secure their networks by Friday, September 25.

Security

TrustSink Attack Abuses Microsoft Entra External MFA to Steal Passwords

Security researchers at Varonis Threat Labs have developed an attack, dubbed TrustSink, that allows attackers who already control a highly privileged Microsoft Entra account to register a rogue external MFA provider that captures users' passwords during legitimate login attempts. The technique exploits the trust placed in external authentication methods, demonstrating how a compromised admin account can silently harvest credentials without disrupting the authentication flow.

Security

New ClosedQuorum malware uses AI panel to autonomously decide attack actions

Cisco Talos researchers have identified a new Windows malware called ClosedQuorum that uses four AI models — Google Gemini, DeepSeek, Qwen, and Mistral — to autonomously decide which actions to take on an infected host, eliminating the need for real-time human operator commands. The Go-based implant employs a voting system among the AI models to select from a predefined set of actions including credential theft, code injection, persistence, and lateral movement, with DeepSeek breaking ties. Stolen data is exfiltrated via Discord webhooks, potentially enabling fully automated attack chains from delivery to exfiltration.

Security

Hacker Group Claims Massive Breach of FBI Data on All Employees and Applicants

A hacking group known as ShinyHunters has claimed responsibility for a major breach of FBI systems, asserting that it stole personal data on every current and former FBI employee and applicant. The group provided a sample of 5,000 records to 404 Media that appeared to contain names, addresses, phone numbers, and details on spouses, which the news outlet partially verified through open-source intelligence. The FBI has not yet commented on the breach.

· 4 sources
Security

F5 and Check Point Issue Emergency Patches for Zero-Day Flaws Exploited in Attacks

F5 has released security updates to address a critical BIG-IP APM zero-day vulnerability (CVE-2026-94127) that is being actively exploited in remote code execution attacks, while Check Point also issued emergency hotfixes this week for a separate zero-day (CVE-2026-93616) targeting its Security Management Server. Both flaws are being exploited in the wild, prompting urgent warnings from the vendors and the U.S. Cybersecurity and Infrastructure Security Agency (CISA).

· 2 sources
Security

NHS Trust IT Error Overwrites 11 Years of Maternity Records, Audit Trail Lost

Nottingham University Hospitals NHS Trust accidentally overwrote a maternity database containing 11 years of records after staff ran a reused script with an incorrect setting, the trust has confirmed. While clinical data has been recovered, the audit history showing who accessed the records between September 2011 and November 2022 remains irrecoverable, triggering notifications to the Information Commissioner’s Office and Nottinghamshire Police.

· 2 sources
Security

Researcher Releases New Windows Defender Zero-Day That Blocks Antivirus Updates

Security researcher Abdelhamid Naceri, also known as Nightmare Eclipse, released a new Microsoft Defender zero-day exploit over the weekend that blocks the antivirus software from performing platform and signature updates. Dubbed BigDiskBuster, the proof-of-concept tool works on all supported Windows versions and must run in the background to prevent Defender from updating, leaving systems with outdated protections.

· 2 sources
Security

Cybersecurity expert remotely hacks BYD Shark 6 with ease, raising concerns about Chinese EV data risks

An Australian cybersecurity expert was able to remotely access and control a BYD Shark 6 hybrid ute within two weeks, with no password required, according to an investigation by ABC News’ Four Corners. The test, conducted on a country road outside Canberra, saw the hacker kill the vehicle’s headlights while the driver was behind the wheel, highlighting what experts say are serious vulnerabilities in connected cars from Chinese manufacturers.

· 2 sources
Security

Malicious npm packages bypass new security defenses by hiding code in runtime behavior

Security researchers have uncovered an ongoing npm malware campaign that sidesteps GitHub’s latest supply-chain protections by concealing malicious code in a package’s runtime execution rather than installation scripts. The package 'indexed-btree', which impersonates the legitimate 'sorted-btree' library, has amassed 2 million weekly downloads and uses an Ethereum smart contract on the Sepolia test network to receive commands, according to Checkmarx.

Security

BragJack attack lets malicious extensions hijack AI browser agents

Security researcher Gal Weizman has disclosed a new attack technique called BragJack that uses a single malicious browser extension to hijack AI assistants built into popular Chromium-based browsers, including Google Chrome's Gemini Live, Microsoft Edge, and Opera Neon. The proof-of-concept, which can run without user interaction, earned more than $20,000 in bug bounties from five vendors, and two CVEs were assigned, with Google and Microsoft already resolving the flaws.

Security

North Korean WaterPlum campaign infected 30,000 devices, stole $10.7M in crypto via fake job interviews, say international agencies

International law enforcement agencies have issued a joint advisory detailing the scale and methods of the North Korean hacking group WaterPlum, which infected over 30,000 devices across 100 countries and stole at least $10.7 million in cryptocurrency through fake job interviews. The advisory, released by authorities in Japan, the United States, Australia, and Germany, reveals specific malware families and warns that compromised devices may provide ongoing access to victims' future employers, posing a persistent threat to corporate networks.

· 3 sources