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Computer/Network Security

Breach intelligence, attack campaigns, and threat reports targeting the Computer/Network Security sector.

1289 threat reports
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Computer/Network Security Threat Reports

Showing 577–588 / 1289 reports
Critical FortiSandbox Vulnerabilities Exploited: Immediate Action Required
Computer/Network Security4 months ago

Critical FortiSandbox Vulnerabilities Exploited: Immediate Action Required

In June 2026, attackers began exploiting critical vulnerabilities in Fortinet's FortiSandbox, specifically CVE-2026-39808 and CVE-2026-39813. These flaws, disclosed and patched in April 2026, allow unauthenticated code execution and authentication bypass, respectively. Despite the availability of patches, threat actors have initiated attacks, potentially compromising systems that rely on FortiSandbox for threat analysis and detection. ([helpnetsecurity.com](https://www.helpnetsecurity.com/2026/06/16/fortisandbox-vulnerabilities-cve-2026-39813-cve-2026-39808-cve-2026-25089/?utm_source=openai)) This incident underscores the persistent risk posed by unpatched vulnerabilities in critical security infrastructure. Organizations must prioritize timely application of security updates to mitigate such threats and maintain the integrity of their defense mechanisms.

High impact

Kill Chain

ICInitial Compromise(high)
PEPrivilege Escalation(medium)
LMLateral Movement(medium)
C&CCommand & Control(medium)
EExfiltration(medium)
IImpact(low)
Read report
Microsoft Defender 'RoguePlanet' Zero-Day Vulnerability (CVE-2026-50656)
Computer/Network Security4 months ago

Microsoft Defender 'RoguePlanet' Zero-Day Vulnerability (CVE-2026-50656)

In June 2026, a security researcher known as Nightmare-Eclipse publicly disclosed a zero-day vulnerability in Microsoft Defender, dubbed 'RoguePlanet'. This flaw, identified as CVE-2026-50656 with a CVSS score of 7.8, exploits a race condition within the Microsoft Malware Protection Engine, allowing attackers to escalate privileges to SYSTEM level on fully patched Windows 10 and 11 systems. The exploit's success rate varies across different machines, but when successful, it grants attackers full control over the affected system. Microsoft has acknowledged the vulnerability and is actively developing a security update to address the issue. ([securityweek.com](https://www.securityweek.com/microsoft-working-on-patch-for-rogueplanet-zero-day/?utm_source=openai)) The disclosure of 'RoguePlanet' underscores the ongoing challenges in securing endpoint protection tools, which are often targeted by attackers due to their deep integration with system processes. This incident highlights the critical need for organizations to implement robust security measures, including application allowlisting and continuous monitoring, to mitigate the risks associated with privilege escalation vulnerabilities. ([bleepingcomputer.com](https://www.bleepingcomputer.com/news/microsoft/microsoft-defender-rogueplanet-zero-day-grants-system-privileges/?utm_source=openai))

Medium impact

Kill Chain

ICInitial Compromise(medium)
PEPrivilege Escalation(high)
LMLateral Movement(medium)
C&CCommand & Control(medium)
EExfiltration(medium)
IImpact(medium)
Read report
Attacker Exploits Tailscale and OpenSSH for Persistent Access in French Automotive Business Breach
Automotive4 months ago

Attacker Exploits Tailscale and OpenSSH for Persistent Access in French Automotive Business Breach

In April 2026, a French-speaking attacker, identified as 'Poisson,' infiltrated a small French automotive business. Utilizing a VBScript stager and PowerShell loader, he deployed the Havoc Demon agent in memory, avoiding disk detection. For persistence, he established scheduled tasks and injected shellcode into Explorer.exe. Notably, before his command-and-control (C2) server went offline, Poisson installed OpenSSH and Tailscale on a compromised machine, creating an independent access route. This allowed him to maintain control even after the C2 server was deactivated, leading to the theft of banking and email credentials. This incident underscores the evolving tactics of cybercriminals who leverage legitimate tools like Tailscale and OpenSSH to establish resilient backdoors. The use of such tools complicates detection and remediation efforts, highlighting the need for organizations to monitor for unauthorized installations and unusual network configurations.

High impact

Kill Chain

ICInitial Compromise(high)
PEPrivilege Escalation(high)
LMLateral Movement(medium)
C&CCommand & Control(high)
EExfiltration(high)
IImpact(medium)
Read report
Debate Erupts Over U.S. Ban on Anthropic's AI Models
Computer Software/Engineering4 months ago

Debate Erupts Over U.S. Ban on Anthropic's AI Models

In June 2026, the U.S. government issued an export control order restricting foreign nationals from accessing Anthropic's advanced AI models, Claude Fable 5 and Mythos 5, citing national security concerns. This led Anthropic to suspend the models' use for all customers to ensure compliance. The security community criticized the decision, arguing that it hampers defenders' access to crucial tools while doing little to prevent adversaries from developing similar capabilities. Experts highlighted that such restrictions might inadvertently accelerate the development of decentralized, open-source alternatives, potentially diminishing U.S. leadership in AI security. The incident underscores the delicate balance between national security and technological advancement, emphasizing the need for policies that support innovation while mitigating risks.

High impact

Kill Chain

ICInitial Compromise(high)
PEPrivilege Escalation(high)
LMLateral Movement(medium)
C&CCommand & Control(medium)
EExfiltration(medium)
IImpact(high)
Read report
Fortinet FortiSandbox Vulnerabilities Under Active Exploitation
Computer/Network Security4 months ago

Fortinet FortiSandbox Vulnerabilities Under Active Exploitation

In June 2026, multiple critical vulnerabilities in Fortinet's FortiSandbox platform—specifically CVE-2026-39813, CVE-2026-39808, and CVE-2026-25089—were actively exploited by threat actors. These flaws allowed unauthenticated attackers to escalate privileges and execute unauthorized code remotely through low-complexity command injection attacks that required no user interaction. Fortinet had released patches for these vulnerabilities in April 2026, but unpatched systems remained at significant risk. The exploitation of these vulnerabilities underscores the persistent targeting of security appliances by cyber adversaries. Organizations relying on FortiSandbox for threat detection must ensure timely application of security updates to mitigate potential breaches and maintain the integrity of their security infrastructure.

Critical impact

Kill Chain

ICInitial Compromise(high)
PEPrivilege Escalation(medium)
LMLateral Movement(medium)
C&CCommand & Control(medium)
EExfiltration(medium)
IImpact(medium)
Read report
Critical cPanel Plugin Vulnerability (CVE-2026-48172) Actively Exploited
Information Technology/IT4 months ago

Critical cPanel Plugin Vulnerability (CVE-2026-48172) Actively Exploited

In May 2026, a critical privilege escalation vulnerability (CVE-2026-48172) was discovered in the LiteSpeed User-End cPanel Plugin versions prior to 2.4.5. This flaw allows authenticated cPanel users to execute arbitrary scripts with root privileges by exploiting the 'lsws.redisAble' function. The vulnerability has been actively exploited in the wild, leading to full system compromises on affected shared hosting servers. LiteSpeed released patches in May 2026, urging users to update to version 2.4.7 or later to mitigate the risk. The active exploitation of this vulnerability underscores the persistent threat posed by privilege escalation flaws in widely used web hosting platforms. Organizations must prioritize timely patching and implement robust monitoring to detect and prevent unauthorized access, especially in shared hosting environments where a single compromised account can jeopardize the entire server.

Critical impact

Kill Chain

ICInitial Compromise(high)
PEPrivilege Escalation(high)
LMLateral Movement(medium)
C&CCommand & Control(medium)
EExfiltration(medium)
IImpact(medium)
Read report
Malicious Wallpapers on Steam Workshop Compromise User Accounts
Computer Games4 months ago

Malicious Wallpapers on Steam Workshop Compromise User Accounts

In late 2025, a significant malware campaign was identified targeting users of Steam's Workshop, particularly through the Wallpaper Engine application. Attackers embedded malicious code within shared wallpaper packages, exploiting the application's feature that allows users to set animated wallpapers. Upon installation, these compromised wallpapers deployed malware capable of hijacking Steam accounts, installing backdoors, or deploying cryptocurrency miners. The primary targets were gamers in China and Russia, with additional victims in Singapore, Hong Kong, Germany, Vietnam, India, and Canada. This campaign underscores the vulnerabilities inherent in user-generated content platforms and the need for vigilant security practices. The incident highlights a growing trend where cybercriminals exploit trusted platforms to distribute malware, leveraging user-generated content as a vector. This approach not only increases the reach of malicious campaigns but also complicates detection and mitigation efforts. As user-generated content continues to proliferate across various platforms, the importance of robust security measures and user awareness becomes increasingly critical.

High impact

Kill Chain

ICInitial Compromise(high)
PEPrivilege Escalation(high)
LMLateral Movement(high)
C&CCommand & Control(high)
EExfiltration(high)
IImpact(high)
Read report
SprySOCKS Windows Variant: A New Threat to Government Cybersecurity
Government Administration4 months ago

SprySOCKS Windows Variant: A New Threat to Government Cybersecurity

In 2023 and 2024, the China-linked cyber-espionage group FishMonger, also known as Earth Lusca and Aquatic Panda, deployed a Windows variant of the SprySOCKS backdoor against government organizations in Honduras, Taiwan, Thailand, and Pakistan. This variant utilizes malicious kernel drivers to evade detection, allowing the backdoor to conceal its processes and files by intercepting system calls and modifying outputs. The attackers likely gained initial access through exploiting vulnerabilities in public-facing servers. The emergence of this Windows variant underscores the evolving tactics of nation-state actors in enhancing malware stealth capabilities. Organizations should be vigilant about the use of kernel drivers in malware, as they pose significant challenges to detection and mitigation efforts.

High impact

Kill Chain

ICInitial Compromise(medium)
PEPrivilege Escalation(high)
LMLateral Movement(high)
C&CCommand & Control(high)
EExfiltration(high)
IImpact(high)
Read report
Fortinet FortiSandbox Critical Vulnerabilities CVE-2026-39813 and CVE-2026-39808
Computer/Network Security4 months ago

Fortinet FortiSandbox Critical Vulnerabilities CVE-2026-39813 and CVE-2026-39808

In April 2026, Fortinet disclosed two critical vulnerabilities in its FortiSandbox product: CVE-2026-39813 and CVE-2026-39808, both with a CVSS score of 9.1. CVE-2026-39813 is a path traversal vulnerability in the JRPC API, allowing unauthenticated attackers to bypass authentication via specially crafted HTTP requests. CVE-2026-39808 is an OS command injection flaw that enables unauthorized code execution through crafted HTTP requests. These vulnerabilities affect FortiSandbox versions 4.4.0 through 4.4.8 and 5.0.0 through 5.0.5. Fortinet has released patches to address these issues. ([helpnetsecurity.com](https://www.helpnetsecurity.com/2026/04/16/fortinet-fortisandbox-vulnerabilities-cve-2026-39813-cve-2026-39808/?utm_source=openai)) The exploitation of these vulnerabilities could lead to full system compromise, undermining the integrity of the security infrastructure. Organizations are urged to apply the patches promptly to mitigate potential risks. ([action1.com](https://www.action1.com/vulnerabilities/cve-2026-39813/?utm_source=openai))

Critical impact

Kill Chain

ICInitial Compromise(high)
PEPrivilege Escalation(high)
LMLateral Movement(medium)
C&CCommand & Control(medium)
EExfiltration(medium)
IImpact(medium)
Read report
UNC6508: Unveiling the Stealthy Chinese Espionage Group Targeting North American Research
Health Care / Life Sciences4 months ago

UNC6508: Unveiling the Stealthy Chinese Espionage Group Targeting North American Research

In late 2025, Google's Threat Intelligence Group identified UNC6508, a Chinese state-sponsored espionage group, which had infiltrated U.S. and Canadian organizations since September 2023. The group exploited vulnerabilities in externally facing REDCap servers to deploy a custom backdoor named INFINITERED, enabling them to steal administrative credentials and sensitive data from medical research universities, clinical providers, and military health institutions. UNC6508 remained undetected for over two years, highlighting the sophistication and stealth of their operations. ([cyberscoop.com](https://cyberscoop.com/google-unc6508-china-espionage-threat/?utm_source=openai)) This incident underscores the persistent threat posed by state-sponsored cyber espionage groups targeting critical infrastructure and sensitive research sectors. The ability of such groups to operate undetected for extended periods emphasizes the need for enhanced cybersecurity measures and vigilance within organizations handling sensitive data. ([cyberscoop.com](https://cyberscoop.com/google-unc6508-china-espionage-threat/?utm_source=openai))

Medium impact

Kill Chain

ICInitial Compromise(high)
PEPrivilege Escalation(high)
LMLateral Movement(medium)
C&CCommand & Control(high)
EExfiltration(high)
IImpact(high)
Read report
Critical Authentication Bypass in SimpleHelp: CVE-2026-48558
Information Technology/IT4 months ago

Critical Authentication Bypass in SimpleHelp: CVE-2026-48558

In June 2026, a critical vulnerability (CVE-2026-48558) was discovered in SimpleHelp remote management software versions 5.5.15 and earlier, as well as 6.0 pre-release versions. This flaw allows unauthenticated attackers to create privileged technician accounts by exploiting improper validation of identity tokens in the OpenID Connect (OIDC) authentication flow. Consequently, attackers can gain unauthorized access to managed endpoints, execute scripts, and perform administrative actions without user interaction. SimpleHelp addressed this issue by releasing patched versions 5.5.16 and 6.0 RC2 on June 9, 2026. Organizations are urged to update their systems promptly to mitigate potential exploitation risks. This incident underscores the critical importance of robust authentication mechanisms and thorough validation processes in remote management tools. The exploitation of OIDC vulnerabilities highlights a growing trend where attackers target identity and access management systems to gain unauthorized access, emphasizing the need for continuous vigilance and timely patch management.

Critical impact

Kill Chain

ICInitial Compromise(high)
PEPrivilege Escalation(high)
LMLateral Movement(medium)
C&CCommand & Control(medium)
EExfiltration(medium)
IImpact(medium)
Read report
U.S. Government Restricts Access to Anthropic's Advanced AI Models
Computer Software/Engineering4 months ago

U.S. Government Restricts Access to Anthropic's Advanced AI Models

In June 2026, the U.S. government issued an export control directive requiring Anthropic to suspend access to its advanced AI models, Fable 5 and Mythos 5, for all foreign nationals, including those within the United States. This action was taken due to national security concerns over potential vulnerabilities that could allow the models to be exploited for identifying software flaws. As a result, Anthropic disabled these models for all users to ensure compliance. This unprecedented move underscores the growing tension between technological advancement and national security, highlighting the challenges in regulating AI technologies. The directive has sparked international debate over the balance between innovation and security, with European leaders expressing concerns about overreliance on American AI providers and advocating for greater technological sovereignty.

High impact

Kill Chain

ICInitial Compromise(high)
PEPrivilege Escalation(medium)
LMLateral Movement(medium)
C&CCommand & Control(medium)
EExfiltration(medium)
IImpact(medium)
Read report
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