Marsh McLennan Company Cyber Security Posture
marshmclennan.comMarsh McLennan (NYSE: MMC) is a global leader in risk, strategy and people, advising clients in 130 countries across four businesses: Marsh, Guy Carpenter, Mercer and Oliver Wyman. With annual revenue of $23 billion and more than 85,000 colleagues, Marsh McLennan helps build the confidence to thrive through the power of perspective. Follow us on X at @MarshMcLennan.
Marsh McLennan Company Details
marsh-&-mclennan-companies-inc-
69653 employees
730038.0
52
Financial Services
marshmclennan.com
Scan still pending
MAR_2353824
In-progress
Marsh McLennan Risk Score (AI oriented)Between 800 and 900
This score is AI-generated and less favored by cyber insurers, who prefer the TPRM score.
Marsh McLennan Global Score.png)
Marsh McLennan Company Scoring based on AI Models
| Model Name | Date | Description | Current Score Difference | Score |
|---|---|---|---|---|
| AVERAGE-Industry | 03-12-2025 | This score represents the average cybersecurity rating of companies already scanned within the same industry. It provides a benchmark to compare an individual company's security posture against its industry peers. | N/A | Between 800 and 900 |
Marsh McLennan Company Cyber Security News & History
| Entity | Type | Severity | Impact | Seen | Url ID | Details | View |
|---|---|---|---|---|---|---|---|
| Marsh & McLennan Companies, Inc. | Breach | 60 | 3 | 6/2013 | MAR307072525 | Link | |
Rankiteo Explanation : Attack with significant impact with internal employee data leaksDescription: The California Office of the Attorney General reported a data breach involving Kroll Background Screening Services, a subsidiary of Marsh & McLennan Companies, Inc. The breach occurred between June 2013 and September 2013, resulting in unauthorized access to personal information, including names and Social Security Numbers. The breach notification was reported on November 26, 2013. | |||||||
| Marsh McLennan | Breach | 85 | 4 | 4/2021 | MAR919072625 | Link | |
Rankiteo Explanation : Attack with significant impact with customers data leaksDescription: The Washington State Office of the Attorney General reported that Marsh McLennan experienced a cyberattack involving unauthorized access to personal information on April 22, 2021, which was discovered on April 26, 2021. The breach potentially affected 2,550 Washington residents, with compromised information including names, Social Security numbers, driver's license numbers, and health insurance information. Notifications to affected individuals began on June 30, 2021. | |||||||
| Marsh McLennan | Data Leak | 50 | 2 | 04/2021 | MAR18242223 | Link | |
Rankiteo Explanation : Attack limited on finance or reputationDescription: Marsh & McLennan Cos. Inc. was hit by a data breach in April involving access to Social Security numbers and other personal information of staff, former staff, clients and a range of other people linked to the brokerage. Marsh McLennan notified that the breach involved a limited set of data and it reset system access rights and imposed additional restrictions. The information involved included names, Social Security numbers or other federal tax identification numbers. The company offered complimentary credit monitoring for two years, identity theft detection and resolution services and up to $1 million in identity theft insurance coverage. | |||||||
Marsh McLennan Company Subsidiaries
Marsh McLennan (NYSE: MMC) is a global leader in risk, strategy and people, advising clients in 130 countries across four businesses: Marsh, Guy Carpenter, Mercer and Oliver Wyman. With annual revenue of $23 billion and more than 85,000 colleagues, Marsh McLennan helps build the confidence to thrive through the power of perspective. Follow us on X at @MarshMcLennan.
Access Data Using Our API
Get company history
Rapid.png)
Marsh McLennan Cyber Security News
Marsh highlights cybersecurity gap between SMEs and large organisations in the EU
The report, “Why the Cybersecurity Gap Between SMEs and Large Organisations Matters,” published by Marsh, highlights the challenges SMEs face in ...
Marsh McLennan-Zurich whitepaper flags growing cyber risk protection gaps, issues call to action
Marsh McLennan-Zurich whitepaper flags growing cyber risk protection gaps, issues call to action. September 10, 2024
Marsh launches cybersecurity compliance program
The program aims to simplify the compliance process and offer enhanced cyber insurance coverage through participating insurers for those meeting ...
Dark web exposure is ‘highly correlated’ with cyberattack risk
Cybercriminals use the dark web to communicate among one another, plan their attacks, and buy, sell, and build the tools they need to execute ...
Always on: Preparing for the future of cyber risk
Cybersecurity is essential, but it's only part of the equation. Here's why a holistic cyber risk strategy is essential to protect your organization.
Closing the cyber risk protection gap
A new whitepaper highlighting the critical need for greater public sector involvement to strengthen societal resilience in the event a catastrophic cyber ...
Companies mentioned on the dark web at higher risk for cyber attacks
The study found that all Searchlight's dark web intelligence sources are correlated to increased cybersecurity risk. The study also included a ...
New Study Finds Significant Correlation Between BitSight Analytics & Cybersecurity Incidents
New research by the Marsh McLennan Cyber Risk Analytics Center (Marsh McLennan) finds 14 Bitsight analytics have statistically significant ...
Zurich, Marsh McLennan Call for Public Partnerships to Close Cyber Gaps
“The need for a public-private approach for cyber risk has emerged from the continuing transformation of the digital economy, the blending of ...
Marsh McLennan Similar Companies
Western Union
Many know us as the most trusted way to send money to friends and family overseas and across borders, but we're much more than that. Our talented teams around the world are building new ways to send, save and spend money. Wherever you are in the world, in whatever currency you choose, we're evolvi
The Citco Group Limited
Our heritage, since founding a civil law notary practice in the 1940s to establishing the Curacao International Trust Company in the 1960s, is built on challenging paradigms and delivering exceptional service within the financial and professional services industry. Today, we continue to pioneer awar
Spandana Sphoorty Financial Limited
Spandana Sphoorty Financial Limited (SSFL) has been operating as a Non-Banking Finance Company (NBFC) incorporated under the Companies Act, 1956 and licensed by the Reserve Bank of India under the Reserve Bank of India Act, 1934 to carry on the business of a Non-Banking Financial Institution without
South China Group
South China Group (“the Group”) is a leading conglomerate with diversified businesses covering wide range of financial services (including asset management, corporate finance, corporate advisory and underwriting services, wealth management, securities, foreign exchange, bullion, financial futures an
CIMB
CIMB Group is a leading ASEAN universal bank, one of the largest Asian investment banks and one of the world's largest Islamic banks. We are headquartered in Kuala Lumpur, Malaysia and offer consumer banking, commercial banking, wholesale banking, Islamic banking, and asset management products and
Bajaj Finserv
Founded in April 2007, Bajaj Finserv is the financial arm of the Bajaj group. We believe in a simple philosophy to never settle for good and go for great. This reflects in our extensive product portfolio that spans across 3 broad categories- lending, insurance and wealth advisory. With 24 products s
Frequently Asked Questions
Explore insights on cybersecurity incidents, risk posture, and Rankiteo's assessments.
Marsh McLennan CyberSecurity History Information
How many cyber incidents has Marsh McLennan faced?
Total Incidents: According to Rankiteo, Marsh McLennan has faced 3 incidents in the past.
What types of cybersecurity incidents have occurred at Marsh McLennan?
Incident Types: The types of cybersecurity incidents that have occurred include Data Leak and Breach.
How does Marsh McLennan detect and respond to cybersecurity incidents?
Detection and Response: The company detects and responds to cybersecurity incidents through an containment measures with reset system access rights, imposed additional restrictions.
Incident Details
Can you provide details on each incident?
Incident : Data Breach
Title: Marsh McLennan Data Breach
Description: Unauthorized access to personal information including names, Social Security numbers, driver's license numbers, and health insurance information.
Date Detected: 2021-04-26
Date Publicly Disclosed: 2021-06-30
Type: Data Breach
Attack Vector: Unauthorized Access
Incident : Data Breach
Title: Marsh & McLennan Companies, Inc. Data Breach
Description: Unauthorized access to personal information, including names and Social Security Numbers, through Kroll Background Screening Services.
Date Detected: 2013-09
Date Publicly Disclosed: 2013-11-26
Type: Data Breach
Attack Vector: Unauthorized Access
Incident : Data Breach
Title: Marsh & McLennan Data Breach
Description: Marsh & McLennan Cos. Inc. was hit by a data breach in April involving access to Social Security numbers and other personal information of staff, former staff, clients, and a range of other people linked to the brokerage.
Date Detected: April 2023
Type: Data Breach
What are the most common types of attacks the company has faced?
Common Attack Types: The most common types of attacks the company has faced is Breach.
Impact of the Incidents
What was the impact of each incident?
Incident : Data Breach MAR919072625
Data Compromised: names, Social Security numbers, driver's license numbers, health insurance information
Incident : Data Breach MAR307072525
Data Compromised: Names, Social Security Numbers
Incident : Data Breach MAR18242223
Data Compromised: Social Security numbers, Federal tax identification numbers, Names
Identity Theft Risk: True
What types of data are most commonly compromised in incidents?
Commonly Compromised Data Types: The types of data most commonly compromised in incidents are names, Social Security numbers, driver's license numbers, health insurance information, Names, Social Security Numbers, Social Security numbers, Federal tax identification numbers and Names.
Which entities were affected by each incident?
Response to the Incidents
What measures were taken in response to each incident?
Incident : Data Breach MAR18242223
Containment Measures: Reset system access rights, Imposed additional restrictions
Data Breach Information
What type of data was compromised in each breach?
Incident : Data Breach MAR919072625
Type of Data Compromised: names, Social Security numbers, driver's license numbers, health insurance information
Number of Records Exposed: 2550
Sensitivity of Data: High
Personally Identifiable Information: True
Incident : Data Breach MAR307072525
Type of Data Compromised: Names, Social Security Numbers
Sensitivity of Data: High
Personally Identifiable Information: True
Incident : Data Breach MAR18242223
Type of Data Compromised: Social Security numbers, Federal tax identification numbers, Names
Sensitivity of Data: High
Personally Identifiable Information: True
How does the company handle incidents involving personally identifiable information (PII)?
Handling of PII Incidents: The company handles incidents involving personally identifiable information (PII) through by reset system access rights and imposed additional restrictions.
References
Where can I find more information about each incident?
Incident : Data Breach MAR919072625
Source: Washington State Office of the Attorney General
Incident : Data Breach MAR307072525
Source: California Office of the Attorney General
Date Accessed: 2013-11-26
Incident : Data Breach MAR18242223
Source: Marsh & McLennan Cos. Inc.
Where can stakeholders find additional resources on cybersecurity best practices?
Additional Resources: Stakeholders can find additional resources on cybersecurity best practices at and Source: Washington State Office of the Attorney General, and Source: California Office of the Attorney GeneralDate Accessed: 2013-11-26, and Source: Marsh & McLennan Cos. Inc..
Stakeholder and Customer Advisories
Were there any advisories issued to stakeholders or customers for each incident?
Incident : Data Breach MAR18242223
Customer Advisories: Complimentary credit monitoring for two years, Identity theft detection and resolution services, Up to $1 million in identity theft insurance coverage
What advisories does the company provide to stakeholders and customers following an incident?
Advisories Provided: The company provides the following advisories to stakeholders and customers following an incident: were Complimentary credit monitoring for two years, Identity theft detection and resolution services and Up to $1 million in identity theft insurance coverage.
Additional Questions
Incident Details
What was the most recent incident detected?
Most Recent Incident Detected: The most recent incident detected was on 2021-04-26.
What was the most recent incident publicly disclosed?
Most Recent Incident Publicly Disclosed: The most recent incident publicly disclosed was on 2021-06-30.
Impact of the Incidents
What was the most significant data compromised in an incident?
Most Significant Data Compromised: The most significant data compromised in an incident were names, Social Security numbers, driver's license numbers, health insurance information, Names, Social Security Numbers, Social Security numbers, Federal tax identification numbers and Names.
Response to the Incidents
What containment measures were taken in the most recent incident?
Containment Measures in Most Recent Incident: The containment measures taken in the most recent incident were Reset system access rights and Imposed additional restrictions.
Data Breach Information
What was the most sensitive data compromised in a breach?
Most Sensitive Data Compromised: The most sensitive data compromised in a breach were names, Social Security numbers, driver's license numbers, health insurance information, Names, Social Security Numbers, Social Security numbers, Federal tax identification numbers and Names.
What was the number of records exposed in the most significant breach?
Number of Records Exposed in Most Significant Breach: The number of records exposed in the most significant breach was 255.0.
References
What is the most recent source of information about an incident?
Most Recent Source: The most recent source of information about an incident are Washington State Office of the Attorney General, California Office of the Attorney General and Marsh & McLennan Cos. Inc..
Stakeholder and Customer Advisories
What was the most recent customer advisory issued?
Most Recent Customer Advisory: The most recent customer advisory issued were an Complimentary credit monitoring for two years, Identity theft detection and resolution services and Up to $1 million in identity theft insurance coverage.
What Do We Measure?
Every week, Rankiteo analyzes billions of signals to give organizations a sharper, faster view of emerging risks. With deeper, more actionable intelligence at their fingertips, security teams can outpace threat actors, respond instantly to Zero-Day attacks, and dramatically shrink their risk exposure window.
These are some of the factors we use to calculate the overall score:
Identify exposed access points, detect misconfigured SSL certificates, and uncover vulnerabilities across the network infrastructure.
Gain visibility into the software components used within an organization to detect vulnerabilities, manage risk, and ensure supply chain security.
Monitor and manage all IT assets and their configurations to ensure accurate, real-time visibility across the company's technology environment.
Leverage real-time insights on active threats, malware campaigns, and emerging vulnerabilities to proactively defend against evolving cyberattacks.
