Incident Score: Analysis & Impact (INT1774592629)
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Rankiteo Score Impact Analysis
Key Highlights From The Incident Analysis
- Timeline of Internet Systems Consortium's Vulnerability and lateral movement inside company's environment.
- Overview of affected data sets, including SSNs and PHI, and why they materially increase incident severity.
- How Rankiteo’s incident engine converts technical details into a normalized incident score.
- How this cyber incident impacts Internet Systems Consortium Rankiteo cyber scoring and cyber rating.
- Rankiteo’s MITRE ATT&CK correlation analysis for this incident, with associated confidence level.
Full Incident Analysis Transcript
In this Rankiteo incident briefing, we review the Internet Systems Consortium breach identified under incident ID INT1774592629.
The analysis begins with a detailed overview of Internet Systems Consortium's information like the linkedin page: https://www.linkedin.com/company/internet-systems-consortium, the number of followers: 2641, the industry type: Technology, Information and Internet and the number of employees: 45 employees
After the initial compromise, the video explains how Rankiteo's incident engine converts technical details into a normalized incident score. The incident score before the incident was 747 and after the incident was 742 with a difference of -5 which is could be a good indicator of the severity and impact of the incident.
In the next step of the video, we will analyze in more details the incident and the impact it had on Internet Systems Consortium and their customers.
On 25 March 2026, Internet Systems Consortium (ISC) disclosed Denial-of-Service (DoS) issues under the banner "Critical Kea DHCP Server Vulnerability Exposes Networks to DoS Attacks".
The Internet Systems Consortium (ISC) has issued a high-severity security advisory for a stack overflow vulnerability (CVE-2026-3608) in its Kea DHCP server software, a widely used solution for IP address management in enterprise and ISP networks.
The disruption is felt across the environment, affecting Kea DHCP server (kea-ctrl-agent, kea-dhcp-ddns, kea-dhcp4, kea-dhcp6).
In response, moved swiftly to contain the threat with measures like Upgrade to patched versions 2.6.5 or 3.0.3; secure API sockets with TLS mutual authentication (cert-required: true), and began remediation that includes Upgrade to patched versions 2.6.5 or 3.0.3.
The case underscores how and recommending next steps like Upgrade to patched versions 2.6.5 or 3.0.3 immediately. For those unable to patch, secure API sockets with TLS mutual authentication (via `cert-required: true`).
Finally, we try to match the incident with the MITRE ATT&CK framework to see if there is any correlation between the incident and the MITRE ATT&CK framework.
The MITRE ATT&CK framework is a knowledge base of techniques and sub-techniques that are used to describe the tactics and procedures of cyber adversaries. It is a powerful tool for understanding the threat landscape and for developing effective defense strategies.
MITRE ATT&CK® Correlation Analysis
Rankiteo's analysis has identified several MITRE ATT&CK tactics and techniques associated with this incident, each with varying levels of confidence based on available evidence. Under the Initial Access tactic, the analysis identified Exploit Public-Facing Application (T1190) with high confidence (90%), supported by evidence indicating vulnerability in its Kea DHCP server software...via API sockets or High Availability (HA) listeners. Under the Impact tactic, the analysis identified Endpoint Denial of Service (T1499) with high confidence (100%), supported by evidence indicating complete denial-of-service (DoS)...immediate DHCP service outage, preventing new devices from joining and Service Exhaustion Flood (T1499.002) with moderate to high confidence (80%), supported by evidence indicating stack overflow in multiple Kea daemons...crash critical network services. Under the Defense Evasion tactic, the analysis identified Exploitation for Defense Evasion (T1211) with moderate to high confidence (70%), supported by evidence indicating improper handling of maliciously crafted messages...triggering a stack overflow. These correlations help security teams understand the attack chain and develop appropriate defensive measures based on the observed tactics and techniques.
Sources & References
- Internet Systems Consortium Rankiteo Cyber Incident Details: https://www.rankiteo.com/company/internet-systems-consortium/incident/INT1774592629
- Internet Systems Consortium CyberSecurity Rating page: https://www.rankiteo.com/company/internet-systems-consortium
- Internet Systems Consortium Rankiteo Cyber Incident Blog Article: https://blog.rankiteo.com/int1774592629-internet-systems-consortium-vulnerability-march-2026/
- Internet Systems Consortium CyberSecurity Score History: https://www.rankiteo.com/company/internet-systems-consortium/history
- Internet Systems Consortium CyberSecurity Incident Source: https://gbhackers.com/isc-issues-critical-warning-over-kea-dhcp-vulnerability/
- Rankiteo A.I CyberSecurity Rating methodology: https://www.rankiteo.com/Images/rankiteo_algo.pdf
- Rankiteo TPRM Scoring methodology: https://static.rankiteo.com/model/rankiteo_tprm_methodology.pdf