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Analyze » Microsoft_SharePoint » MIC1779805440

Incident Score: Analysis & Impact (MIC1779805440)

The details regarding individual company incidents & reports gives you full view from every side.

Rankiteo Score Impact Analysis

Rankiteo Incident Impact-4
Company Score Before Incident760 / 1000
Company Score After Incident756 / 1000
Company LinkView Microsoft_SharePoint Profile
INCIDENT NUMBERMIC1779805440
Type of Cyber IncidentVulnerability
ATTACK VECTORNetwork-based
DATA EXPOSEDNA
INCIDENT DATE20/05/2026
STATUSpublished

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 MIC1779805440.

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 760 and after the incident was 756 with a difference of -4 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.

On 21 May 2026, Microsoft SharePoint Server Subscription Edition disclosed Remote Code Execution (RCE) issues under the banner "Critical SharePoint Server Vulnerability (CVE-2026-45659) Exposes Organizations to Remote Code Execution".

On May 21, 2026, Microsoft disclosed a critical security flaw in SharePoint Server (CVE-2026-45659) that allows authenticated attackers to execute arbitrary code remotely.

The disruption is felt across the environment, affecting SharePoint Server (on-premises).

In response, moved swiftly to contain the threat with measures like Apply patches, audit user permissions, monitor logs for suspicious activity, isolate internet-facing instances, and began remediation that includes Microsoft has released patches for all impacted versions.

The case underscores how and recommending next steps like Organizations are advised to apply updates immediately, audit user permissions, monitor logs for suspicious activity, and isolate internet-facing instances until patches are deployed.

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%), with evidence including vulnerability affects multiple on-premises SharePoint versions, and network-based attackers to exploit it with low complexity and Valid Accounts (T1078) with high confidence (95%), supported by evidence indicating authenticated user with Site Member-level permissions can trigger the vulnerability. Under the Execution tactic, the analysis identified Exploitation for Client Execution (T1203) with high confidence (90%), supported by evidence indicating allows authenticated attackers to execute arbitrary code remotely and Command and Scripting Interpreter (T1059) with moderate to high confidence (80%), supported by evidence indicating execute arbitrary code remotely via improper deserialization. Under the Privilege Escalation tactic, the analysis identified Exploitation for Privilege Escalation (T1068) with moderate to high confidence (70%), supported by evidence indicating authenticated user with Site Member-level permissions can trigger RCE. Under the Defense Evasion tactic, the analysis identified Exploitation for Defense Evasion (T1211) with moderate to high confidence (70%), supported by evidence indicating improper deserialization of untrusted data enables exploitation. Under the Impact tactic, the analysis identified Resource Hijacking (T1496) with moderate confidence (60%), supported by evidence indicating remote code execution poses significant risk to organizations. These correlations help security teams understand the attack chain and develop appropriate defensive measures based on the observed tactics and techniques.

Initial Access
Exploit Public-Facing Application (90%)
Valid Accounts (95%)
Execution
Exploitation for Client Execution (90%)
Command and Scripting Interpreter (80%)
Privilege Escalation
Exploitation for Privilege Escalation (70%)
Defense Evasion
Exploitation for Defense Evasion (70%)
Impact
Resource Hijacking (60%)

Sources & References