Data Breach News | Latest Cybersecurity Reports – Veri Sızıntısı

Publications & Analyses

Argus Flow releases, platform announcements, press updates, and cybersecurity analyses.

A critical data leakage vulnerability in OpenSSL has been patched. This flaw could expose cryptographic keys and sensitive data. Immediate updates are crucial for all users.
Argus Flow 08 Apr 2026

OpenSSL Data Leakage Vulnerability Patched

A critical data leakage vulnerability has been identified and patched in the OpenSSL library. This flaw could have potentially led to the exposure of sensitive information, including cryptographic keys and user data. Users are urged to update their OpenSSL installations immediately to apply the security fix.

A Massachusetts hospital faced a cyberattack on April 8, 2026, leading to ambulance diversions and operational disruption. Learn about the impact and healthcare cybersecurity risks.
Argus Flow 08 Apr 2026

Massachusetts Hospital Faces Cyberattack, Ambulances Diverted

A hospital in Massachusetts recently experienced a significant cyberattack, leading to the diversion of incoming ambulances and widespread operational disruption. While the full extent of the incident is under investigation, such attacks often pose risks to patient data and critical healthcare services.

The US disrupted a Russian espionage operation using hacked routers and DNS hijacking. Learn about the methods, targets, and cybersecurity recommendations.
Argus Flow 08 Apr 2026

US Disrupts Russian Espionage Operation Using Hacked Routers and DNS Hijacking

The United States has successfully disrupted a sophisticated Russian espionage operation that utilized compromised routers and DNS hijacking techniques to gain unauthorized access and gather intelligence. The operation targeted various entities, aiming to steal sensitive data and manipulate network traffic. Specific details on the number of affected records or exact data types exfiltrated are not disclosed, but the focus was on intelligence gathering.

Iran-linked hackers have disrupted US critical infrastructure by exploiting internet-exposed PLCs. Learn about the attack, its impact, and mitigation strategies for OT security.
Argus Flow 08 Apr 2026

Iran-Linked Hackers Disrupt US Critical Infrastructure via PLCs

Iran-linked hacker groups have reportedly targeted Internet-exposed Programmable Logic Controllers (PLCs) to disrupt critical infrastructure in the United States. This attack primarily caused operational disturbances within the affected systems, focusing on control system integrity rather than data exfiltration.

Russian military intelligence hackers exploited router flaws to steal Microsoft Office authentication tokens from users. Learn about the attack and mitigation.
Argus Flow 07 Apr 2026

Russian Hackers Exploit Routers to Steal Microsoft Office Tokens

Hackers linked to Russian military intelligence exploited known vulnerabilities in older internet routers to steal authentication tokens from many Microsoft Office users. This spying campaign allowed state-backed actors to quietly siphon sensitive login data.

Learn about GrafanaGhost, a new attack method allowing attackers to abuse Grafana instances to leak sensitive enterprise data. Discover mitigation strategies.
Argus Flow 07 Apr 2026

GrafanaGhost: New Attack Method Leaks Enterprise Data via Grafana

A recently identified attack method, dubbed GrafanaGhost, enables attackers to exploit Grafana instances to leak sensitive enterprise data. This vulnerability poses a significant risk to organizations using Grafana for monitoring and analytics, potentially exposing critical internal information.

Over 1,000 exposed ComfyUI instances targeted by a cryptomining botnet. Attackers exploit systems for illicit mining. Learn impact & how to protect your ComfyUI setup.
Argus Flow 07 Apr 2026

Over 1,000 ComfyUI Instances Hit by Cryptomining Botnet

More than 1,000 exposed ComfyUI instances have been targeted by a cryptomining botnet campaign. Attackers are exploiting these systems to mine cryptocurrency, leading to resource degradation and increased operational costs for affected users.

German law enforcement identified the REvil ransomware group leader, a major win against cybercrime. This disrupts operations and aids global cybersecurity efforts.
Argus Flow 07 Apr 2026

German Police Unmask REvil Ransomware Leader

German law enforcement has announced the successful identification of the individual believed to be the leader of the notorious REvil ransomware group. This significant development marks a major blow to the organized cybercrime syndicate, known for high-profile attacks globally. The unmasking is expected to disrupt future operations and aid in broader efforts against ransomware threats.

New GPUBreach attack demonstrates root shell access using GPU Rowhammer. This hardware-based vulnerability poses a significant threat to system security.
Argus Flow 07 Apr 2026

GPUBreach: Root Shell Access Achieved via GPU Rowhammer Attack

Researchers have demonstrated a new GPU Rowhammer attack technique named GPUBreach, successfully gaining root shell access on systems. This attack exploits vulnerabilities in graphics processing unit memory, enabling unauthorized access to critical systems. Consequently, exploiting such a flaw could lead to data compromise or complete loss of system control.

Medusa ransomware quickly exploits vulnerabilities to breach systems, leading to data exfiltration and encryption. Learn about their tactics and essential prevention strategies.
Argus Flow 07 Apr 2026

Medusa Ransomware Rapidly Exploits Vulnerabilities to Breach Systems

Medusa ransomware group is noted for its speed in exploiting system vulnerabilities to infiltrate networks. While specific breach details are not provided, their operations typically involve data exfiltration and encryption, affecting various organizational data types. Organizations are urged to enhance their defensive measures against this pervasive threat.

Discover the GPUBreach attack, a critical vulnerability exploiting GDDR6 memory bit-flips for full CPU privilege escalation, enabling unauthorized system control. Learn about its implications.
Argus Flow 07 Apr 2026

GPUBreach Attack Enables Full CPU Privilege Escalation via GDDR6 Bit-Flips

A new security vulnerability named GPUBreach allows attackers to achieve full CPU privilege escalation. This is accomplished through bit-flips in GDDR6 memory, enabling bypass of system security measures and potential full control over affected systems. No specific hacking incidents or number of affected records have been reported yet, but the risk potential is high.

China-linked Storm-1175 group uses zero-day exploits to rapidly deploy Medusa ransomware. Learn about the threat and crucial defense strategies.
Argus Flow 07 Apr 2026

China-Linked Storm-1175 Deploys Medusa Ransomware Using Zero-Days

A threat actor identified as China-Linked Storm-1175 has been observed exploiting zero-day vulnerabilities to rapidly deploy Medusa ransomware. While specific victim details and the extent of data exfiltration remain undisclosed, this attack highlights a severe and sophisticated cyber threat. Organizations are urged to enhance their defenses against such advanced persistent threats.