Comparison Overview

UCLA Health

VS

Sienna Senior Living

UCLA Health

757 Westwood Plaza, Los Angeles, CA, 90095, US
Last Update: 2025-11-27
Between 700 and 749

For more than half a century, UCLA Health has provided the best in healthcare and the latest in medical technology to the people of Los Angeles and throughout the world. Comprised of Ronald Reagan UCLA Medical Center, UCLA Medical Center Santa Monica, Resnick Neuropsychiatric Hospital at UCLA, UCLA Mattel Children's Hospital, UCLA West Valley Medical Center and the UCLA Medical Group with its wide-reaching system of primary-care and specialty-care offices throughout the region, UCLA Health is among the most comprehensive and advanced healthcare systems in the world. Our physicians are world leaders in the diagnosis and treatment of complex illnesses, and our hospitals are among the best in the country. Consistently ranked one of the top ten hospitals in the nation and the best medical center in the western United States by U.S. News & World Report, Ronald Reagan UCLA Medical Center is at the cutting edge of biomedical research, and our doctors and scientists are leaders in performing pioneering work across an astounding range of disciplines, from organ transplantation and cardiac surgery to neurosurgery and cancer treatment, and bringing the latest discoveries to virtually every field of medicine.

NAICS: 62
NAICS Definition: Health Care and Social Assistance
Employees: 16,547
Subsidiaries: 50
12-month incidents
0
Known data breaches
14
Attack type number
3

Sienna Senior Living

302 Town Centre Blvd, Suite 300 Markham, Ontario L3R0E8, CA
Last Update: 2025-11-21
Between 750 and 799

At Sienna Senior Living, our Purpose is to cultivate happiness in daily life. Our work does not stop at providing the highest quality of service and care to our residents - it goes much further. Each and every day, we strive to bring happiness into our residents’ lives by enabling our team to put their passion for their work into action and supporting families to bring joy into our homes. Sienna is one of Canada’s largest owners and operators of senior living options, with 93 high-quality residences in key markets in Ontario, British Columbia, Alberta and Saskatchewan. We offer independent living, assisted living and memory care under our Aspira retirement brand, as well as long-term care, specialized programs and services, and expert management services. Our approximately 12,500 team members are committed to helping residents discover happiness through personalization, choice and community engagement in a comfortable, home-like setting. Our aim is to consistently create a positive resident experience, along with a high-performing team and workplace culture that are driven by shared Values and a commitment to innovation and excellence. As leaders in the sector, we leverage technology and best practices to constantly set new benchmarks for quality. At the same time, we never lose sight of our vision— to be Canada’s most trusted and most loved senior living provider.

NAICS: 62
NAICS Definition:
Employees: 10,001
Subsidiaries: 0
12-month incidents
0
Known data breaches
0
Attack type number
0

Compliance Badges Comparison

Security & Compliance Standards Overview

https://images.rankiteo.com/companyimages/ucla-health.jpeg
UCLA Health
ISO 27001
ISO 27001 certification not verified
Not verified
SOC2 Type 1
SOC2 Type 1 certification not verified
Not verified
SOC2 Type 2
SOC2 Type 2 certification not verified
Not verified
GDPR
GDPR certification not verified
Not verified
PCI DSS
PCI DSS certification not verified
Not verified
HIPAA
HIPAA certification not verified
Not verified
https://images.rankiteo.com/companyimages/sienna-senior-living.jpeg
Sienna Senior Living
ISO 27001
ISO 27001 certification not verified
Not verified
SOC2 Type 1
SOC2 Type 1 certification not verified
Not verified
SOC2 Type 2
SOC2 Type 2 certification not verified
Not verified
GDPR
GDPR certification not verified
Not verified
PCI DSS
PCI DSS certification not verified
Not verified
HIPAA
HIPAA certification not verified
Not verified
Compliance Summary
UCLA Health
100%
Compliance Rate
0/4 Standards Verified
Sienna Senior Living
0%
Compliance Rate
0/4 Standards Verified

Benchmark & Cyber Underwriting Signals

Incidents vs Hospitals and Health Care Industry Average (This Year)

No incidents recorded for UCLA Health in 2025.

Incidents vs Hospitals and Health Care Industry Average (This Year)

No incidents recorded for Sienna Senior Living in 2025.

Incident History — UCLA Health (X = Date, Y = Severity)

UCLA Health cyber incidents detection timeline including parent company and subsidiaries

Incident History — Sienna Senior Living (X = Date, Y = Severity)

Sienna Senior Living cyber incidents detection timeline including parent company and subsidiaries

Notable Incidents

Last 3 Security & Risk Events by Company

https://images.rankiteo.com/companyimages/ucla-health.jpeg
UCLA Health
Incidents

Date Detected: 12/2024
Type:Ransomware
Motivation: Financial Gain
Blog: Blog

Date Detected: 1/2024
Type:Breach
Attack Vector: Phishing
Blog: Blog

Date Detected: 10/2023
Type:Ransomware
Motivation: Financial Gain
Blog: Blog
https://images.rankiteo.com/companyimages/sienna-senior-living.jpeg
Sienna Senior Living
Incidents

No Incident

FAQ

Sienna Senior Living company demonstrates a stronger AI Cybersecurity Score compared to UCLA Health company, reflecting its advanced cybersecurity posture governance and monitoring frameworks.

UCLA Health company has historically faced a number of disclosed cyber incidents, whereas Sienna Senior Living company has not reported any.

In the current year, Sienna Senior Living company and UCLA Health company have not reported any cyber incidents.

UCLA Health company has confirmed experiencing a ransomware attack, while Sienna Senior Living company has not reported such incidents publicly.

UCLA Health company has disclosed at least one data breach, while the other Sienna Senior Living company has not reported such incidents publicly.

Neither Sienna Senior Living company nor UCLA Health company has reported experiencing targeted cyberattacks publicly.

Neither UCLA Health company nor Sienna Senior Living company has reported experiencing or disclosing vulnerabilities publicly.

Neither UCLA Health nor Sienna Senior Living holds any compliance certifications.

Neither company holds any compliance certifications.

UCLA Health company has more subsidiaries worldwide compared to Sienna Senior Living company.

UCLA Health company employs more people globally than Sienna Senior Living company, reflecting its scale as a Hospitals and Health Care.

Neither UCLA Health nor Sienna Senior Living holds SOC 2 Type 1 certification.

Neither UCLA Health nor Sienna Senior Living holds SOC 2 Type 2 certification.

Neither UCLA Health nor Sienna Senior Living holds ISO 27001 certification.

Neither UCLA Health nor Sienna Senior Living holds PCI DSS certification.

Neither UCLA Health nor Sienna Senior Living holds HIPAA certification.

Neither UCLA Health nor Sienna Senior Living holds GDPR certification.

Latest Global CVEs (Not Company-Specific)

Description

Angular is a development platform for building mobile and desktop web applications using TypeScript/JavaScript and other languages. Prior to versions 19.2.16, 20.3.14, and 21.0.1, there is a XSRF token leakage via protocol-relative URLs in angular HTTP clients. The vulnerability is a Credential Leak by App Logic that leads to the unauthorized disclosure of the Cross-Site Request Forgery (XSRF) token to an attacker-controlled domain. Angular's HttpClient has a built-in XSRF protection mechanism that works by checking if a request URL starts with a protocol (http:// or https://) to determine if it is cross-origin. If the URL starts with protocol-relative URL (//), it is incorrectly treated as a same-origin request, and the XSRF token is automatically added to the X-XSRF-TOKEN header. This issue has been patched in versions 19.2.16, 20.3.14, and 21.0.1. A workaround for this issue involves avoiding using protocol-relative URLs (URLs starting with //) in HttpClient requests. All backend communication URLs should be hardcoded as relative paths (starting with a single /) or fully qualified, trusted absolute URLs.

Risk Information
cvss4
Base: 7.7
Severity: LOW
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/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
Description

Forge (also called `node-forge`) is a native implementation of Transport Layer Security in JavaScript. An Uncontrolled Recursion vulnerability in node-forge versions 1.3.1 and below enables remote, unauthenticated attackers to craft deep ASN.1 structures that trigger unbounded recursive parsing. This leads to a Denial-of-Service (DoS) via stack exhaustion when parsing untrusted DER inputs. This issue has been patched in version 1.3.2.

Risk Information
cvss4
Base: 8.7
Severity: LOW
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/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
Description

Forge (also called `node-forge`) is a native implementation of Transport Layer Security in JavaScript. An Integer Overflow vulnerability in node-forge versions 1.3.1 and below enables remote, unauthenticated attackers to craft ASN.1 structures containing OIDs with oversized arcs. These arcs may be decoded as smaller, trusted OIDs due to 32-bit bitwise truncation, enabling the bypass of downstream OID-based security decisions. This issue has been patched in version 1.3.2.

Risk Information
cvss4
Base: 6.3
Severity: LOW
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/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
Description

Suricata is a network IDS, IPS and NSM engine developed by the OISF (Open Information Security Foundation) and the Suricata community. Prior to versions 7.0.13 and 8.0.2, working with large buffers in Lua scripts can lead to a stack overflow. Users of Lua rules and output scripts may be affected when working with large buffers. This includes a rule passing a large buffer to a Lua script. This issue has been patched in versions 7.0.13 and 8.0.2. A workaround for this issue involves disabling Lua rules and output scripts, or making sure limits, such as stream.depth.reassembly and HTTP response body limits (response-body-limit), are set to less than half the stack size.

Risk Information
cvss3
Base: 7.5
Severity: LOW
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Description

Suricata is a network IDS, IPS and NSM engine developed by the OISF (Open Information Security Foundation) and the Suricata community. In versions from 8.0.0 to before 8.0.2, a NULL dereference can occur when the entropy keyword is used in conjunction with base64_data. This issue has been patched in version 8.0.2. A workaround involves disabling rules that use entropy in conjunction with base64_data.

Risk Information
cvss3
Base: 7.5
Severity: LOW
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H