CESI A.I CyberSecurity Scoring
CESI
Company Information
Website:http://www.cornerstoneenergyinc.com
Employees number:85
Number of followers:1,423
NAICS:22
Industry Type:Utilities
Homepage:cornerstoneenergyinc.com
CESI Risk Score (AI oriented)
Between 650 and 699
CESIUtilities
Updated:
02/04/2026
02/04/2026
693/1000
Weak
B
CESI Global Score (TPRM)
xxxx
CESIUtilities
Score locked

CESIWeak
Current Score
693B (WEAK)
01000
1 incidents
0 avg impact
Incident timeline with MITRE ATT&CK tactics, techniques, and mitigations.
SEPTEMBER 2026
699
AUGUST 2026
698
JULY 2026
697
JUNE 2026
695
MAY 2026
694
APRIL 2026
693
MARCH 2026
693
FEBRUARY 2026
691
JANUARY 2026
690
DECEMBER 2025
689
NOVEMBER 2025
688
OCTOBER 2025
686
JULY 2023
754
Ransomware
25 Jul 2023 • CESI
Cornerstone Energy Services, Inc.
Cornerstone Energy Services Ransomware Incident
639
CRITICAL-115
COR205072825
The Maine Office of the Attorney General reported that Cornerstone Energy Services, Inc. experienced a ransomware incident on July 25, 2023, potentially affecting 500 individuals, with 200 residents specifically noted. The breach involved an external system breach (hacking) and compromised various personal information, including Social Security Numbers and driver's license numbers. Identity theft protection services for 24 months via LifeLock were offered to affected individuals.
INCIDENT DETAILS -
TYPE
IMPACT
DATA BREACH
REFERENCES
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