VulnHub

Researchers from Defused have reported ongoing attacks exploiting a serious SQL injection vulnerability in Fortinet's FortiClient EMS, identified as CVE-2026-21643. These intrusions have been active since March 24, raising concerns for organizations using this software. SQL injection vulnerabilities allow attackers to manipulate database queries, potentially leading to unauthorized access and data breaches. Companies utilizing FortiClient EMS are urged to take immediate action to protect their systems and data from these exploits. The situation emphasizes the need for regular security updates and vigilance against emerging threats.

A serious SQL injection vulnerability, tracked as CVE-2026-21643, has been discovered in Fortinet's FortiClient Endpoint Management Server (EMS), which manages FortiClient endpoint agents across multiple platforms. This vulnerability is currently being actively exploited, as reported by Defused Cyber, a firm that specializes in threat intelligence. Although it has not yet been listed on CISA’s Known Exploited Vulnerabilities (KEV) list, the ongoing attacks pose significant risks to organizations using FortiClient EMS. Companies should take immediate action to assess their systems and implement necessary security measures to safeguard against potential breaches. The situation emphasizes the need for vigilance in monitoring and securing endpoint management solutions.

Iranian hacking groups are increasingly using high-volume cyberattacks that have a low impact but can disrupt systems and services. These attacks have been enhanced by artificial intelligence, making them more effective. Affected entities include hospitals and other critical infrastructure, which are particularly vulnerable to these tactics. This trend reflects a growing integration of digital warfare in geopolitical conflicts, posing risks not only to the targeted organizations but also to public safety and national security. As these cyber threats evolve, it becomes crucial for organizations to bolster their cybersecurity measures and stay vigilant against potential attacks.

F5 Networks has escalated the severity of a vulnerability in its BIG-IP Application Policy Manager (APM) from a denial-of-service issue to a critical remote code execution flaw. This vulnerability allows attackers to exploit unpatched devices and deploy webshells, which can give them unauthorized access to systems. Organizations using affected versions of BIG-IP are urged to apply the necessary patches immediately to prevent potential breaches. The exploitation of this flaw poses a significant risk, especially for businesses relying on BIG-IP for application delivery and security. With reports of active attacks already in progress, it is crucial for users to take swift action to secure their environments.

Researchers from watchTowr and Defused have discovered that attackers are exploiting CVE-2026-3055, a serious vulnerability affecting Citrix NetScaler. This flaw allows unauthorized access to systems that utilize the NetScaler product, which is commonly used for application delivery and load balancing. Organizations using NetScaler are at risk, as the vulnerability is currently being actively targeted in the wild. Companies should be aware of this threat and take immediate action to protect their systems, as the consequences of exploitation could lead to significant data breaches and operational disruptions. It's crucial for affected users to stay informed and apply any available patches as soon as possible.

A serious vulnerability in Fortinet's FortiClient EMS platform, identified as CVE-2026-21643, is currently being exploited by attackers. This flaw, which has a CVSS score of 9.1, allows for remote code execution through SQL injection. Researchers from Defused have reported active exploitation of this vulnerability, posing significant risks to organizations using FortiClient EMS. Companies are urged to take immediate action to protect their systems, as the potential for unauthorized access and control could lead to severe consequences. It is essential for affected users to stay informed and apply any available patches promptly to mitigate the risks associated with this flaw.

A serious vulnerability in Fortinet's FortiClient EMS platform is currently being exploited by attackers, according to the threat intelligence firm Defused. This flaw poses significant risks to organizations using the affected software, as it allows unauthorized access and potential control over their systems. Companies that rely on FortiClient EMS for endpoint management and security should urgently assess their systems to mitigate the risk. The ongoing exploitation of this vulnerability underscores the need for timely updates and security patches to protect sensitive data and maintain system integrity. Users are advised to follow best practices for cybersecurity and monitor for any unusual activities.

A pro-Ukrainian hacking group known as Bearlyfy has carried out over 70 cyber attacks against Russian companies since January 2025. Their recent campaigns have utilized a custom ransomware known as GenieLocker, which targets Windows systems. This group aims to disrupt operations in Russian businesses, indicating a strategic move in the ongoing conflict between Ukraine and Russia. The use of ransomware adds a financial pressure point, potentially crippling affected organizations. As these attacks continue, it raises concerns about the security of critical infrastructure and business operations in the region.

The Cybersecurity and Infrastructure Security Agency (CISA) has issued a warning regarding a serious vulnerability in the Langflow framework, designated as CVE-2026-33017. This flaw allows attackers to hijack AI workflows, potentially leading to unauthorized access and manipulation of AI systems. Organizations using Langflow should be particularly vigilant as the vulnerability is currently being exploited in the wild. This situation poses significant risks not only to the integrity of AI applications but also to the security of the data they handle. Immediate action is recommended to mitigate risks associated with this vulnerability.

A backdoor known as BPFdoor, linked to Chinese cyber actors, has been discovered operating within the Linux kernel of key telecom servers and Kubernetes pods. First identified in 2021, this backdoor is now posing a significant risk to global telecommunications infrastructure. Researchers found that BPFdoor's stealthy design allows it to evade detection while compromising critical systems. This situation is concerning as it impacts the reliability and security of telecom services worldwide, potentially allowing attackers to intercept communications or disrupt services. Companies in the telecom sector need to be vigilant and take immediate action to secure their systems against this threat.