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Aon

Aon Vendor Cyber Rating & Cyber Score

aon.com

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 over 120 countries with the clarity and confidence to make better risk and people decisions that help protect and grow their businesses.


Aon A.I CyberSecurity Scoring

Aon
Company Information
Website:http://www.aon.com
Employees number:90,093
Number of followers:1,568,260
NAICS:52
Industry Type:Financial Services
Homepage:aon.com
Aon Risk Score (AI oriented)
Between 750 and 799
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AonFinancial Services
Updated:
01/04/2026
766/1000
Fair
Baa
AaaAaABaaBaBCaaCaC
Powered by our proprietary A.I cyber incident model
Insurance prefers TPRM score to calculate premium
Aon Global Score (TPRM)
xxxx
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AonFinancial Services
•••
Score locked
Instant access to detailed risk factors
Vulnerabilities
Benchmark vs. industry & size peers
Findings

Aon
AonFair
Current Score
766Baa (FAIR)
01000
4 incidents
0 avg impact
Incident timeline with MITRE ATT&CK tactics, techniques, and mitigations.
JUNE 2026
770Before Incident
MAY 2026
766Before Incident
APRIL 2026
766Before Incident
MARCH 2026
765Before Incident
FEBRUARY 2026
764Before Incident
JANUARY 2026
763Before Incident
DECEMBER 2025
764Before Incident
NOVEMBER 2025
761Before Incident
OCTOBER 2025
760Before Incident
SEPTEMBER 2025
758Before Incident
AUGUST 2025
757Before Incident
JULY 2025
756Before Incident
JULY 2023
763Before Incident
Data Leak
01 Jul 2023Aon
Aon

MOVEit Attack on Aon Compromises Personal Data of Dublin Airport Staff

716After Incident
HIGH-47
AON20209723
A MOVEit attack on the business service provider Aon resulted in the personal data of 3000 staff at the Dublin Airport being compromised. An unauthenticated attacker might use the SQL injection vulnerability to access MOVEit Transfer's database without authorization. DAA has stated that it is helping the affected employees, however, Aon has not yet made a public statement regarding the security issue.
INCIDENT DETAILS -
TYPE
Data Breach
IMPACT
Data Compromised: Personal DataSystems Affected: MOVEit Transfer
DATA BREACH
Type Of Data Compromised: Personal Data
FEBRUARY 2022
753Before Incident
Cyber Attack
01 Feb 2022Aon
Aon

Cyber Attack on Aon

739After Incident
HIGH-14
AON19301322
Aon, the global insurance and reinsurance broker was recently targeted in a cyber-attack. The attack hit a limited number of its systems and didn't had a significant impact on its operations.
INCIDENT DETAILS -
TYPE
Cyber Attack
IMPACT
Systems Affected: limited number of systemsOperational Impact: didn't have a significant impact on its operations
DECEMBER 2020
782Before Incident
Breach
29 Dec 2020Aon
Aon Corporation PLC

Data Breach at Aon Corporation PLC

734After Incident
HIGH-48
AON604072625
The Washington Attorney General's Office reported a data breach involving Aon Corporation PLC on May 26, 2022. The breach, which began on December 29, 2020, was due to unauthorized access and affected 6,889 individuals in Washington, compromising names, Social Security numbers, and driver's license numbers.
INCIDENT DETAILS -
TYPE
Data Breach
IMPACT
NamesSocial Security numbersDriver's license numbers
DATA BREACH
NamesSocial Security numbersDriver's license numbersSensitivity Of Data: High
MAY 2020
819Before Incident
Breach
29 May 2020Aon
Aon PLC

Aon PLC Cyber Incident

776After Incident
CRITICAL-43
AON427072825
On May 26, 2022, the California Office of the Attorney General reported that Aon PLC experienced a cyber incident impacting certain systems, which occurred between December 29, 2020, and February 26, 2022. The breach potentially compromised personal information including names, Social Security numbers, and driver's license numbers, although it is stated that there is no evidence of misuse of personal information.
INCIDENT DETAILS -
TYPE
Data Breach
IMPACT
namesSocial Security numbersdriver's license numbers
DATA BREACH
namesSocial Security numbersdriver's license numbersSensitivity Of Data: High

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