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Analyze » The Vanguard Group » THE1771000228

Incident Score: Analysis & Impact (THE1771000228)

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

Rankiteo Score Impact Analysis

Rankiteo Incident Impact-58
Company Score Before Incident755 / 1000
Company Score After Incident697 / 1000
Company LinkView The Vanguard Group Profile
INCIDENT NUMBERTHE1771000228
Type of Cyber IncidentBreach
ATTACK VECTORNA
DATA EXPOSEDSocial Security numbers
INCIDENT DATE10/02/2026
STATUSOngoing

Key Highlights From The Incident Analysis

  • Timeline of The Vanguard Group's Breach 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 The Vanguard Group 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 The Vanguard Group breach identified under incident ID THE1771000228.

The analysis begins with a detailed overview of The Vanguard Group's information like the linkedin page: https://www.linkedin.com/company/the-vanguard-group, the number of followers: 476, the industry type: Real Estate and the number of employees: 46 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 755 and after the incident was 697 with a difference of -58 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 The Vanguard Group and their customers.

On 11 February 2026, The Vanguard Group disclosed Data Breach issues under the banner "Vanguard Group Data Breach Impacting Sensitive Consumer Information".

On February 11, 2026, investment management giant The Vanguard Group reported a data breach to the Massachusetts Office of Consumer Affairs and Business Regulation, revealing that sensitive consumer information had been compromised.

The disruption is felt across the environment, and exposing Social Security numbers.

In response, and stakeholders are being briefed through Notified affected individuals and authorities.

The case underscores how Ongoing, with advisories going out to stakeholders covering Notified affected individuals.

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 Valid Accounts (T1078) with moderate confidence (60%), supported by evidence indicating no details on attack vector; financial institutions often targeted via valid accounts and Exploit Public-Facing Application (T1190) with moderate confidence (50%), supported by evidence indicating attack vector unspecified; public-facing apps common in financial breaches. Under the Credential Access tactic, the analysis identified Modify Authentication Process (T1556) with moderate confidence (50%), supported by evidence indicating social Security numbers compromised; may indicate auth process tampering and OS Credential Dumping (T1003) with lower confidence (40%), supported by evidence indicating high-sensitivity PII exposed; potential credential dumping. Under the Collection tactic, the analysis identified Data from Local System (T1005) with moderate to high confidence (70%), supported by evidence indicating social Security numbers compromised; likely collected from local systems. Under the Exfiltration tactic, the analysis identified Exfiltration Over C2 Channel (T1041) with moderate confidence (60%), supported by evidence indicating data breach disclosed; exfiltration likely occurred via C2 and Exfiltration Over Web Service (T1567) with moderate confidence (50%), supported by evidence indicating financial data often exfiltrated via web services. Under the Impact tactic, the analysis identified Stored Data Manipulation (T1565.001) with lower confidence (40%), supported by evidence indicating high-sensitivity PII compromised; potential data manipulation. These correlations help security teams understand the attack chain and develop appropriate defensive measures based on the observed tactics and techniques.

Initial Access
Valid Accounts (60%)
Exploit Public-Facing Application (50%)
Credential Access
Modify Authentication Process (50%)
OS Credential Dumping (40%)
Collection
Data from Local System (70%)
Exfiltration
Exfiltration Over C2 Channel (60%)
Exfiltration Over Web Service (50%)
Impact
Stored Data Manipulation (40%)

Sources & References