Trend Micro has released patches addressing eight critical and high-severity vulnerabilities in its Apex One endpoint security products for Windows and macOS. These vulnerabilities could potentially allow attackers to compromise endpoint systems, impacting confidentiality, integrity, and availability. Although no known exploits are currently reported in the wild, the critical severity indicates a significant risk if left unpatched. Organizations using Apex One on Windows and macOS should prioritize applying these patches promptly to mitigate potential attacks. The threat primarily affects environments where Trend Micro Apex One is deployed, which includes enterprises globally. Due to the critical nature and the broad deployment of these endpoint products, the risk spans multiple sectors and regions. Immediate remediation is essential to prevent exploitation that could lead to unauthorized access or disruption of endpoint security functions.

Trend Micro has addressed eight vulnerabilities classified as critical and high severity within its Apex One endpoint security solutions for Windows and macOS platforms. Apex One is widely used in enterprise environments to provide endpoint protection, including malware detection and response capabilities. The vulnerabilities, while not detailed in the provided information, are significant enough to warrant a critical severity rating, suggesting potential for remote code execution, privilege escalation, or bypass of security controls. These flaws could allow attackers to execute arbitrary code, escalate privileges, or disable security features, thereby compromising endpoint integrity and confidentiality. The lack of known exploits in the wild indicates these vulnerabilities were likely discovered through internal research or responsible disclosure. However, the critical nature demands urgent patching to prevent future exploitation. The absence of CVSS scores limits precise risk quantification, but the critical tag implies high impact and ease of exploitation. The vulnerabilities affect both Windows and macOS versions of Apex One, highlighting a cross-platform risk vector. Trend Micro's patch release is a proactive measure to secure endpoints against potential attacks leveraging these flaws.

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Trend Micro Patches Critical Apex One Vulnerabilities

The provided information pertains to a Maltrail Indicator of Compromise (IOC) dated February 26, 2026, sourced from the CIRCL OSINT Feed. Maltrail is a network traffic detection system designed to identify suspicious or malicious network activity by analyzing traffic patterns and known malicious indicators. This IOC is classified as malware-related but lacks specific details such as affected software versions, malware family, or attack vectors. The entry does not list any known exploits in the wild or available patches, indicating that it is primarily an observational data point rather than a report of an active or newly discovered vulnerability. The IOC is tagged with 'medium' severity, reflecting a moderate risk level based on the observed network activity. The technical details are minimal, with no concrete indicators of compromise (such as IP addresses, domains, or file hashes) provided, limiting the ability to perform targeted detection or response. The classification under OSINT and network activity suggests that this IOC is derived from manual collection and external analysis of network traffic patterns, potentially highlighting emerging or ongoing malware campaigns. The absence of CWE identifiers and patch information further supports that this is a threat intelligence observation rather than a software vulnerability. Organizations utilizing network monitoring tools like Maltrail can use this IOC to enhance their detection capabilities by correlating it with internal network data to identify potential malware infections or communications. However, without specific indicators, the IOC serves more as a contextual alert to maintain heightened vigilance against malware-related network anomalies.

CIRCL OSINT Feed

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Maltrail IOC for 2026-02-26

The KRVTZ-NET IDS alerts dated 2026-02-26 highlight network reconnaissance activity targeting Fortinet FortiGate VPN devices. The alerts specifically identify repeated GET requests to the /remote/logincheck endpoint, which is associated with CVE-2023-27997, a known vulnerability in FortiGate VPNs that could allow unauthorized access or exploitation if successfully leveraged. The indicators include IPv6 addresses (2001:470:1:c84::19 and 2001:470:1:fb5:4709:6cd5:858c:48d) and an IPv4 address (185.177.72.60) exhibiting suspicious user-agent strings mimicking legitimate browsers but with anomalous versioning, suggesting automated scanning or probing tools. The activity is categorized as reconnaissance in the kill chain, indicating attackers are gathering information to identify vulnerable targets. No patches are currently linked in this report, and no known exploits in the wild have been confirmed, suggesting this is early-stage probing rather than active exploitation. The low severity rating reflects the preliminary nature of the threat, but the presence of these scans indicates persistent interest in FortiGate VPN vulnerabilities by threat actors. The CIRCL OSINT feed provides this data as part of ongoing monitoring of network activity and threat intelligence gathering.

ET EXPLOIT Fortigate VPN - Repeated GET Requests to /remote/logincheck (CVE-2023-27997)

ET HUNTING Suspicious User-Agent Observed (Mozilla/5.0 (Windows NT XX.X Win64 x64) AppleWebKit/XXX.XX)

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KRVTZ-NET IDS alerts for 2026-02-26

A zero-day vulnerability in Cisco Catalyst SD-WAN has been discovered and patched after exploitation by highly sophisticated attackers. This flaw enables attackers to bypass authentication mechanisms and gain administrative privileges on affected devices. The vulnerability has been added to CISA’s Known Exploited Vulnerabilities (KEV) catalog, highlighting its critical nature. Although no public proof-of-concept exploits or widespread exploitation have been reported yet, the risk remains significant due to the potential for full system compromise. Cisco has released patches to address this issue, emphasizing the urgency for organizations using Catalyst SD-WAN to update promptly. The vulnerability impacts network infrastructure critical for secure wide-area network management and could lead to severe confidentiality, integrity, and availability breaches if exploited. Organizations worldwide relying on Cisco SD-WAN solutions should prioritize mitigation to prevent unauthorized access and potential lateral movement within their networks. Given the complexity and sophistication of the attackers, this threat poses a high risk to enterprise and government networks globally.

The identified zero-day vulnerability affects Cisco Catalyst SD-WAN, a widely deployed software-defined wide-area networking solution used to manage and secure enterprise WANs. The flaw allows attackers to bypass authentication controls, granting them administrative privileges without valid credentials. This type of privilege escalation can enable attackers to fully control the affected devices, manipulate network traffic, disrupt services, or deploy further malicious payloads. The vulnerability's inclusion in CISA’s KEV catalog underscores its exploitation by advanced threat actors, indicating targeted attacks against critical network infrastructure. Although specific technical details such as the exact attack vector or vulnerability type (e.g., buffer overflow, logic flaw) have not been disclosed, the ability to bypass authentication suggests a severe design or implementation weakness. Cisco has issued patches to remediate the vulnerability, but no known exploits in the wild have been publicly confirmed, suggesting either limited or highly targeted use so far. The affected systems are integral to network operations, making timely patching essential to prevent potential compromise and lateral movement within enterprise environments.

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Cisco Patches Catalyst SD-WAN Zero-Day Exploited by Highly Sophisticated Hackers

CVE-2026-28138 is a deserialization of untrusted data vulnerability in the Stylemix uListing plugin versions up to 2. 2. 0. This flaw allows an attacker to perform object injection by exploiting unsafe deserialization processes. Although no known exploits are currently reported in the wild, successful exploitation could lead to remote code execution or other malicious behaviors. The vulnerability affects websites using the uListing plugin, commonly deployed on WordPress platforms. No official patches or fixes have been published yet, increasing the urgency for mitigation. Exploitation does not require authentication but may require user interaction depending on the attack vector. Organizations using this plugin should prioritize risk assessment and implement immediate protective measures. Countries with significant WordPress usage and e-commerce or listing platforms are at higher risk.

CVE-2026-28138 identifies a critical vulnerability in the Stylemix uListing WordPress plugin, specifically versions up to and including 2.2.0. The vulnerability arises from unsafe deserialization of untrusted data, which enables object injection attacks. Deserialization is the process of converting data from a format suitable for storage or transmission back into an object in memory. When this process is performed on untrusted input without proper validation or sanitization, attackers can manipulate the serialized data to inject malicious objects. This can lead to arbitrary code execution, privilege escalation, or other unauthorized actions within the affected application environment. The uListing plugin is widely used for creating listing and directory websites on WordPress, making it a valuable target for attackers seeking to compromise such sites. Although no public exploits have been reported yet, the nature of the vulnerability and the widespread use of the plugin suggest a significant risk. The lack of a CVSS score and absence of official patches indicate that the vulnerability is newly disclosed and requires immediate attention from administrators. The vulnerability does not specify whether authentication or user interaction is required, but typically, deserialization flaws can be exploited remotely by sending crafted requests to vulnerable endpoints. This vulnerability underscores the importance of secure coding practices around serialization and deserialization in web applications.

CVE Database V5

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CVE-2026-28138: Deserialization of Untrusted Data in Stylemix uListing

TOTOLINK AC1200 T8 v4.1.5cu.861_B20230220 has a buffer overflow vulnerability in the setWiFiAclRules function via the desc parameter.

Detailed information about CVE-2024-46451: n/a. Get real-time updates, technical details, and mitigation strategies.

CVE-2024-46451: n/a

CVE-2024-46451: n/a

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