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Comparison Overview

Marsh McLennanMarsh McLennan
VS
AonAon
Marsh McLennan

Marsh McLennan

1166 Avenue of the Americas, New York, NY, US, 10036

Last Update: 18/07/2026

View Profile
810/1000Good

Marsh (NYSE: MRSH) is a global leader in risk, strategy and people, advising clients in 130 countries across four businesses: Marsh Risk, Guy Carpenter, Mercer and Oliver Wyman. With annual revenue over $24 billion and more than 90,000 ...

NAICS:52
NAICS Definition:Finance and Insurance
Employees:45,730
Subsidiaries:0
12-month incidents
0
Known data breaches
1
Attack type number
2
Aon

Aon

122 Leadenhall Street, London, GB, EC3V 4AN

Last Update: 26/07/2026

View Profile
Between 700 and 749
http://www.aon.com
736/1000Moderate

We exist to shape decisions for the better — to protect and enrich the lives of people around the world. Through actionable analytic insight, globally integrated Risk Capital and Human Capital expertise, and locally relevant solutions, our colleagues provide clients in ...

NAICS:52
NAICS Definition:Finance and Insurance
Employees:90,093
Subsidiaries:11
12-month incidents
0
Known data breaches
2
Attack type number
4

Compliance Ranges Comparison

Based On Specific Ai Models Category
Marsh McLennan

Marsh McLennan

-
ISO 27001Not verified
ISO 27001
-
SOC2 Type 1Not verified
SOC2 Type 1
-
SOC2 Type 2Not verified
SOC2 Type 2
-
GDPRNot verified
GDPR
-
PCI DSSNot verified
PCI DSS
-
HIPAANot verified
HIPAA
Aon

Aon

-
ISO 27001Not verified
ISO 27001
-
SOC2 Type 1Not verified
SOC2 Type 1
-
SOC2 Type 2Not verified
SOC2 Type 2
-
GDPRNot verified
GDPR
-
PCI DSSNot verified
PCI DSS
-
HIPAANot verified
HIPAA

Benchmark & Cyber Underwriting Signals

Incidents vs Financial Services Industry Avg (This Year)

No incidents recorded for Marsh McLennan in 2026.

Incidents

Incidents vs Financial Services Industry Avg (This Year)

No incidents recorded for Aon in 2026.

Incidents

Incident History - Marsh McLennan (X = Date, Y = Severity)

Marsh McLennan cyber incidents detection timeline including parent company and subsidiaries.

R - Ransomware
C - Cyber Attack
D - Data Breach
V - Vulnerability

Incident History - Aon (X = Date, Y = Severity)

Aon cyber incidents detection timeline including parent company and subsidiaries.

R - Ransomware
C - Cyber Attack
D - Data Breach
V - Vulnerability

Notable Incidents

Last Cyber / HR Incidents / Global...
Marsh McLennan

Marsh McLennan

Incidents
🔒 Incident : Data Leak
MAR18242223
🔒 Incident : Breach
MAR307072525
Aon

Aon

Incidents
🔒 Incident : Ransomware
OFCK&LAONPROKIRSHEPWCMOV1781843490
🔒 Incident : Data Leak
AON20209723
🔒 Incident : Cyber Attack
AON19301322

FAQ

Between Marsh McLennan company and Aon company, which one has the best AI Cybersecurity Score ?
Between Marsh McLennan company and Aon company, which one has experienced more cyber incidents in the past ?
Between Marsh McLennan company and Aon company, which one has experienced more cyber incidents this year ?
Between Marsh McLennan company and Aon company, which one has experienced at least one ransomware attack ?
Between Marsh McLennan company and Aon company, which one has experienced at least one data breach ?
Between Marsh McLennan company and Aon company, which one has experienced at least one targeted cyberattack ?
Between Marsh McLennan company and Aon company, which one has experienced at least one vulnerability ?
Between Marsh McLennan company and Aon company, which one holds the most compliance certifications ?
Between Marsh McLennan company and Aon company, which one holds the fewest compliance certifications ?
Between Marsh McLennan company and Aon company, which one has the most subsidiaries ?
Between Marsh McLennan company and Aon company, which one has the largest number of employees ?
Between Marsh McLennan and Aon, which company holds both SOC 2 Type 1 certifications ?
Between Marsh McLennan and Aon, which company holds both SOC 2 Type 2 certifications ?
Which company is ISO 27001 certified - Marsh McLennan or Aon ?
Which company is PCI DSS compliant - Marsh McLennan or Aon ?
Between Marsh McLennan and Aon, which company complies with HIPAA regulations for healthcare data ?
Between Marsh McLennan and Aon, which company complies with GDPR requirements ?

Latest Global CVEs

CVE-2026-81934
SUMMARY

Redis contains a use-after-free vulnerability in the 'tlsProcessPendingData()' function, which handles the TLS pending-data list if Redis is configured with TLS support. A remote, unauthenticated attacker may be able to execute arbitrary commands with the privileges of the Redis server. Fixed in Redis 8.2.9, 8.4.6, 8.6.6, 8.8.2, and 8.10.1.

PUBLISHED
Date2026-08-27
UPDATED
Date2026-08-27
RISK INFORMATION (Score: 9.8)
CVSS3
Base Score: 9.8
Complexity: LOW
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS4
Base Score: 9.2
Complexity: LOW
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
IMPACT SCORE
5.9
EXPLOITABILITY
3.9
CVE-2026-81931
SUMMARY

Unrestricted Upload of File with Dangerous Type in the product photo upload in Roskus Prospero Flow CRM before 5.16.0 allows an authenticated user holding the create product permission (routine Seller role) to execute arbitrary JavaScript in the application origin. The photo validation rule classifies the file only by its content (magic bytes) and rejects only a fixed list of PHP extensions, while ProductSaveController::save() names the stored file using the client-supplied extension and copies it into the public web root. A file that begins with an image header and carries an HTML extension passes validation, is stored under public/asset/upload/product/, and is served with a text/html content type, turning the upload into first-party stored script execution.

PUBLISHED
Date2026-08-27
UPDATED
Date2026-08-27
RISK INFORMATION (Score: )
CVSS4
Base Score: 4.8
Complexity: LOW
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
IMPACT SCORE
NA
EXPLOITABILITY
NA
CVE-2026-81893
SUMMARY

A flaw was found in gdk-pixbuf. When loading a specially crafted JPEG image containing chunked ICC profile markers, an error during ICC profile parsing can leave stale size metadata after the profile buffer is freed. A subsequent allocation in the same decode can cause an out-of-bounds write, potentially crashing the application. To exploit this flaw, an application using gdk-pixbuf must process the malicious JPEG image. Affected version >= 2.26.4

PUBLISHED
Date2026-08-27
UPDATED
Date2026-08-27
RISK INFORMATION (Score: 4.7)
CVSS3
Base Score: 4.7
Complexity: HIGH
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H
IMPACT SCORE
3.6
EXPLOITABILITY
1
CVE-2026-81838
SUMMARY

A relative path traversal issue in the zip extraction functionality in AWS diagram-as-code (awsdac) in versions 0.10 through 0.23 can allow a third party to write arbitrary files to the local filesystem via crafted zip entry names containing path traversal sequences. This could allow the third party to perform inappropriate actions in the diagram bundle. To remediate this issue, users should upgrade to the version 0.24 or later.

PUBLISHED
Date2026-08-27
UPDATED
Date2026-08-27
RISK INFORMATION (Score: 7.1)
CVSS3
Base Score: 7.1
Complexity: LOW
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H
CVSS4
Base Score: 6.8
Complexity: LOW
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
IMPACT SCORE
5.2
EXPLOITABILITY
1.8
CVE-2026-81834
SUMMARY

A weakness has been identified in RooCodeInc Roo-Code up to 3.51.1. Affected by this issue is the function ExecaTerminalProcess of the component README File Handler. Executing a manipulation can lead to code injection. The attack can be executed remotely. The exploit has been made available to the public and could be used for attacks. Multiple isses were reported to the vendor beforehand. They explain, that "they all apply to Roo Code, a project we no longer support - the repository was archived a while ago, and we don't encourage anyone to use it." This vulnerability only affects products that are no longer supported by the maintainer.

PUBLISHED
Date2026-08-27
UPDATED
Date2026-08-27
RISK INFORMATION (Score: 6.3)
CVSS2
Base Score: 7.5
Complexity: LOW
AV:N/AC:L/Au:N/C:P/I:P/A:P
CVSS3
Base Score: 6.3
Complexity: LOW
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
CVSS4
Base Score: 2.1
Complexity: LOW
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
IMPACT SCORE
3.4
EXPLOITABILITY
2.8