Combine AI-driven security operations, multi-signal attack surface coverage and 24/7 Elite Threat Hunters to help you take your security program to the next level.
Get unlimited Incident Response with threat suppression guarantee - anytime, anywhere.
CTEM and advisory programs that identify security gaps and build proactive strategies to address them.
Multi-agent Generative AI system embedded across eSentire’s Security Operations platform to scale human expertise.
Extended Detection andOpen XDR with Agentic AI & machine learning that eliminates noise, enables real-time detection and response, and automatically blocks threats.
Customer PortalSee what our SOC sees, review investigations, and see how we are protecting your business.
Platform IntegrationsSeamless integrations and threat investigation across your existing tech stack.
24/7 SOC-as-a-Service with unlimited threat hunting and incident handling.
Threat Response Unit (TRU)Proactive threat intelligence, original threat research and a world-class team of seasoned industry veterans.
Cyber Resilience TeamExtend your team capabilities and prevent business disruption with expertise from eSentire.
Response and RemediationWe balance automated blocks with rapid human-led investigations to manage threats.
Flexible MDR pricing and packages that fit your unique security requirements.
Entry level foundational MDR coverage
Comprehensive Next Level eSentire MDR
Next Level eSentire MDR with Cyber Risk Advisors to continuously advance your security program
Stop ransomware before it spreads.
Identity ResponseStop identity-based cyberattacks.
Zero Day AttacksDetect and respond to zero-day exploits.
Cybersecurity ComplianceMeet regulatory compliance mandates.
Third-Party RiskDefend third-party and supply chain risk.
Cloud MisconfigurationEnd misconfigurations and policy violations.
Cyber RiskAdopt a risk-based security approach.
Mid-Market SecurityMid-market security essentials to prioritize.
Sensitive Data SecurityProtect your most sensitive data.
Cyber InsuranceMeet insurability requirements with MDR.
Cyber Threat IntelligenceOperationalize cyber threat intelligence.
Security LeadershipBuild a proven security program.
THE THREAT On October 15th, 2025, F5 disclosed that the organization was impacted by a breach involving an unspecified state-sponsored threat actor. The threat actors were…
THE THREATOn October 4th, 2025 Oracle released a security advisory addressing a critical, zero-day vulnerability impacted its E-Business Suite (EBS), identified during their investigation…
eSentire is The Authority in Managed Detection and Response Services, protecting the critical data and applications of 2000+ organizations in 80+ countries from known and unknown cyber threats. Founded in 2001, the company’s mission is to hunt, investigate and stop cyber threats before they become business disrupting events.
About Us Leadership CareersWe provide sophisticated cybersecurity solutions for Managed Security Service Providers (MSSPs), Managed Service Providers (MSPs), and Value-Added Resellers (VARs). Find out why you should partner with eSentire, the Authority in Managed Detection and Response, today.
Search our site
Multi-Signal MDR with 300+ technology integrations to support your existing investments.
24/7 SOC-as-a-Service with unlimited threat hunting and incident handling.
We offer three flexible MDR pricing packages that can be customized to your unique needs.
The latest security advisories, blogs, reports, industry publications and webinars published by TRU.
Compare eSentire to other Managed Detection and Response vendors to see how we stack up against the competition.
See why 2000+ organizations globally have chosen eSentire for their MDR Solution.
On August 12th, Fortinet disclosed a critical vulnerability impacting multiple versions of Fortinet FortiSIEM. The flaw, CVE-2025-25256 (CVSS: 9.8), is a remote unauthenticated command injection vulnerability due to improper neutralization of special elements used in an OS command in the affected FortiSIEM versions. Fortinet has confirmed the existence of practical exploit code circulating in the wild, though no active exploitation has been identified at the time of writing. Successful exploitation may result in severe consequences, including full system compromise, remote code execution, theft of sensitive data, and/or malware deployment.
Given the criticality of the vulnerability and the existence of Proof-of-Concept (PoC) exploit code, the eSentire Threat Intelligence team assesses that real-world exploitation is probable in the near term. Organizations operating vulnerable instances of FortiSIEM are recommended to apply the relevant security updates immediately.
Additional information
Fortinet FortiSIEM is a multi-tenant Security Information and Event Management (SIEM) solution that provides real-time visibility into infrastructure and user activity across on-premise and cloud environments. It is used by enterprises and Managed Service Providers (MSPs) across the United States and worldwide, reflecting its broad adoption.
Following Fortinet’s advisory, the Canadian Centre for Cyber Security (CCCS) issued an alert for CVE-2025-25256, emphasizing the criticality of the vulnerability. CVE-2025-25256's disclosure came shortly after GreyNoise reported a surge in brute-force attacks targeting Fortinet SSL VPNs on August 3rd, 2025. According to GreyNoise, such spikes often precede the disclosure of new vulnerabilities affecting the same vendor. While this does not indicate a direct link between CVE-2025-25256 and GreyNoise’s report, it has prompted some speculation.
CVE-2025-25256 is not specifically classified as a zero-day by Fortinet, and it remains unclear whether it should be considered one. The advisory also did not include Indicators of Compromise (IoCs), as the company stated that exploitation of CVE-2025-25256 does not produce distinctive IoCs. A similar vulnerability, CVE-2023-34992 (CVSS: 9.8), affecting multiple FortiSIEM versions, was identified in October 2023. The PoC exploit code for that flaw revealed an issue with how the phMonitor service in FortiSIEM instance handles incoming requests. A workaround recommended to mitigate CVE-2025-25256 is to restrict access to the phMonitor port (7900), suggesting a similar potential exploit chain.
Given the widespread use of Fortinet FortiSIEM, threat actors are likely to target vulnerable instances using the available PoC exploit code. It is critical for organizations to apply the recommended workaround or security patches promptly to avoid the potential risk of exploitation.
Impacted Versions List:
References:
[1] https://www.fortiguard.com/psirt/FG-IR-25-152
[2] https://nvd.nist.gov/vuln/detail/CVE-2025-25256
[3] https://www.cyber.gc.ca/en/alerts-advisories/fortinet-security-advisory-av25-506
[4] https://www.greynoise.io/blog/vulnerability-fortinet-vpn-bruteforce-spike
[5] https://nvd.nist.gov/vuln/detail/cve-2023-34992
[6] https://horizon3.ai/attack-research/disclosures/cve-2023-34992-fortinet-fortisiem-command-injection-deep-dive/