Incident Score: Analysis & Impact (MIC1783520623)
The details regarding individual company incidents & reports gives you full view from every side.
Rankiteo Score Impact Analysis
Key Highlights From The Incident Analysis
- Timeline of Microsoft_SharePoint'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 Microsoft_SharePoint 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 Microsoft_SharePoint breach identified under incident ID MIC1783520623.
The analysis begins with a detailed overview of Microsoft_SharePoint's information like the linkedin page: https://www.linkedin.com/company/microsoft_sharepoint, the number of followers: 0, the industry type: Software Development and the number of employees: None 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 769 and after the incident was 767 with a difference of -2 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 Microsoft_SharePoint and their customers.
A newly reported cybersecurity incident, "Critical SharePoint RCE Vulnerability (CVE-2025-53770) Exploited in the Wild", has drawn attention.
Proof-of-concept (PoC) exploit code and technical details have been released for CVE-2025-53770, a critical remote code execution (RCE) vulnerability in on-premises Microsoft SharePoint Server.
The disruption is felt across the environment, affecting Microsoft SharePoint Server 2016, 2019, Subscription Edition.
In response, moved swiftly to contain the threat with measures like Apply Microsoft’s latest patches, enable AMSI integration, rotate ASP.NET MachineKey values, monitor for suspicious PerformancePoint and ViewState activity, and began remediation that includes Microsoft released emergency patches and introduced TypeNameParserImpl component to address generic type handling in DataSet objects.
The case underscores how and recommending next steps like Apply Microsoft’s latest patches, enable AMSI integration, rotate ASP.NET MachineKey values, monitor for suspicious PerformancePoint and ViewState activity, and restrict access to vulnerable endpoints.
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 critical remote code execution (RCE) vulnerability in on-premises Microsoft SharePoint Server and Exploitation of Remote Services (T1210) with high confidence (90%), supported by evidence indicating allows unauthenticated attackers to execute arbitrary code over the network. Under the Execution tactic, the analysis identified Exploitation for Client Execution (T1203) with high confidence (90%), supported by evidence indicating exploiting how SharePoint processes specially crafted data sources to achieve RCE and Command and Scripting Interpreter (T1059) with moderate to high confidence (80%), supported by evidence indicating successful exploitation spawns arbitrary processes, such as win32calc.exe. Under the Privilege Escalation tactic, the analysis identified Exploitation for Privilege Escalation (T1068) with moderate to high confidence (70%), supported by evidence indicating attack requires only a low-privileged SharePoint site member account. Under the Defense Evasion tactic, the analysis identified Exploitation for Defense Evasion (T1211) with moderate to high confidence (80%), supported by evidence indicating bypass security controls by abusing XML schema processing in ExcelDataSet control and Deobfuscate/Decode Files or Information (T1140) with moderate to high confidence (70%), supported by evidence indicating deserialization-of-untrusted-data issue allows evading XmlValidator checks. Under the Lateral Movement tactic, the analysis identified Exploitation of Remote Services (T1210) with moderate to high confidence (70%), supported by evidence indicating exploits SharePoint Server over the network to execute arbitrary code. These correlations help security teams understand the attack chain and develop appropriate defensive measures based on the observed tactics and techniques.
Sources & References
- Microsoft_SharePoint Rankiteo Cyber Incident Details: https://www.rankiteo.com/company/microsoft_sharepoint/incident/MIC1783520623
- Microsoft_SharePoint CyberSecurity Rating page: https://www.rankiteo.com/company/microsoft_sharepoint
- Microsoft_SharePoint Rankiteo Cyber Incident Blog Article: https://blog.rankiteo.com/mic1783520623-microsoft-vulnerability-may-2025/
- Microsoft_SharePoint CyberSecurity Score History: https://www.rankiteo.com/company/microsoft_sharepoint/history
- Microsoft_SharePoint CyberSecurity Incident Source: https://cybersecuritynews.com/poc-sharepoint-rce-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