Comparison Overview

SYNLAB UK & Ireland

VS

Quest Diagnostics

SYNLAB UK & Ireland

2 Portman Street, London, W1H 6DU, GB
Last Update: 2026-01-22
Between 0 and 549

At SYNLAB, we provide laboratory, diagnostic and advisory services to a diverse range of sectors, from healthcare, wellness and veterinary, to food, family law and transport. We carry out over 25 million tests every year and employ more than 1,300 people across the UK and Ireland. We pride ourselves on the positive difference we make to people, animals, the environment, workplaces and other consumers by providing reliable, effective and timely diagnostic information. Our extensive network of laboratories offers thousands of different types of tests. These include routine blood, toxicology, food, fuel, water and soil analysis through to cutting edge molecular and genetic testing. At SYNLAB, we are committed to advancing scientific and clinical practice through innovation, research and development. All our laboratories comply with industry standards and hold the accreditations relevant to their field of work. We are proud to work with the NHS through a number of hospital partnerships. These combine clinical excellence with the very best in innovation and transformation. SYNLAB’s involvement has enabled the NHS to realise a number of benefits, such as major improvements to patient services, better value for money and access to state-of-the-art laboratories and diagnostic services. SYNLAB UK & Ireland is part of SYNLAB Group, Europe’s leading medical diagnostic services provider.

NAICS: 6215
NAICS Definition: Medical and Diagnostic Laboratories
Employees: 293
Subsidiaries: 12
12-month incidents
0
Known data breaches
0
Attack type number
1

Quest Diagnostics

500 Plaza Drive, Secaucus, 07094, US
Last Update: 2026-01-21

Quest Diagnostics (NYSE: DGX) empowers people to take action to improve health outcomes. Derived from the world's largest database of clinical lab results, our diagnostic insights reveal new avenues to identify and treat disease, inspire healthy behaviors and improve health care management. Quest annually serves one in three adult Americans and half the physicians and hospitals in the United States, and our 47,000 employees understand that, in the right hands and with the right context, our diagnostic insights can inspire actions that transform lives. The company offers physicians the broadest test menu (3,000+ tests), is a pioneer in developing innovative new tests, is the leader in cancer diagnostics, provides anatomic pathology (AP) services, & interpretive consultation through its medical & scientific staff of about 900 M.D.s & Ph.D.s. The company reported 2020 revenues of $9.44 billion. Quest Diagnostics offers the most extensive clinical testing network in the U.S., with laboratories in most major metropolitan areas, & in Mexico, the UK & India. The company also operates four esoteric laboratories, 40 outpatient AP laboratories, & 160 smaller, rapid-response laboratories. Patients may have specimens collected in any of the company’s approximately 2,250 patient service centers. On a typical workday, testing is performed for about 550,000 patients. Quest Diagnostics empowers healthcare organizations & clinicians with state-of-the-art connectivity solutions. The company is the leading provider of pre-employment drugs-of-abuse screening for employers & risk assessment services for the life insurance industry. It is the world’s 2nd largest provider of clinical trials testing for new pharmaceuticals. More information is available at www.questdiagnostics.com. Language Assistance / Non-Discrimination Notice Asistencia de Idiomas / Aviso de no Discriminación 語言協助 / 不歧視通知 www.QuestDiagnostics.com/home/nondiscrimination

NAICS: 6215
NAICS Definition: Medical and Diagnostic Laboratories
Employees: 31,274
Subsidiaries: 7
12-month incidents
0
Known data breaches
4
Attack type number
2

Compliance Badges Comparison

Security & Compliance Standards Overview

https://images.rankiteo.com/companyimages/synlab-uk.jpeg
SYNLAB UK & Ireland
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/quest-diagnostics.jpeg
Quest Diagnostics
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
SYNLAB UK & Ireland
100%
Compliance Rate
0/4 Standards Verified
Quest Diagnostics
0%
Compliance Rate
0/4 Standards Verified

Benchmark & Cyber Underwriting Signals

Incidents vs Medical and Diagnostic Laboratories Industry Average (This Year)

No incidents recorded for SYNLAB UK & Ireland in 2026.

Incidents vs Medical and Diagnostic Laboratories Industry Average (This Year)

No incidents recorded for Quest Diagnostics in 2026.

Incident History — SYNLAB UK & Ireland (X = Date, Y = Severity)

SYNLAB UK & Ireland cyber incidents detection timeline including parent company and subsidiaries

Incident History — Quest Diagnostics (X = Date, Y = Severity)

Quest Diagnostics cyber incidents detection timeline including parent company and subsidiaries

Notable Incidents

Last 3 Security & Risk Events by Company

https://images.rankiteo.com/companyimages/synlab-uk.jpeg
SYNLAB UK & Ireland
Incidents

Date Detected: 1/2025
Type:Ransomware
Attack Vector: Stolen credentials, Social engineering, Supply chain vulnerabilities
Motivation: Financial gain, Extortion, Operational disruption
Blog: Blog
https://images.rankiteo.com/companyimages/quest-diagnostics.jpeg
Quest Diagnostics
Incidents

Date Detected: 8/2024
Type:Breach
Blog: Blog

Date Detected: 11/2021
Type:Ransomware
Attack Vector: Ransomware
Blog: Blog

Date Detected: 10/2021
Type:Breach
Attack Vector: Inadvertent Email
Blog: Blog

FAQ

Quest Diagnostics company demonstrates a stronger AI Cybersecurity Score compared to SYNLAB UK & Ireland company, reflecting its advanced cybersecurity posture governance and monitoring frameworks.

Quest Diagnostics company has faced a higher number of disclosed cyber incidents historically compared to SYNLAB UK & Ireland company.

In the current year, Quest Diagnostics company and SYNLAB UK & Ireland company have not reported any cyber incidents.

Both Quest Diagnostics company and SYNLAB UK & Ireland company have confirmed experiencing at least one ransomware attack.

Quest Diagnostics company has disclosed at least one data breach, while SYNLAB UK & Ireland company has not reported such incidents publicly.

Neither Quest Diagnostics company nor SYNLAB UK & Ireland company has reported experiencing targeted cyberattacks publicly.

Neither SYNLAB UK & Ireland company nor Quest Diagnostics company has reported experiencing or disclosing vulnerabilities publicly.

Neither SYNLAB UK & Ireland nor Quest Diagnostics holds any compliance certifications.

Neither company holds any compliance certifications.

SYNLAB UK & Ireland company has more subsidiaries worldwide compared to Quest Diagnostics company.

Quest Diagnostics company employs more people globally than SYNLAB UK & Ireland company, reflecting its scale as a Medical and Diagnostic Laboratories.

Neither SYNLAB UK & Ireland nor Quest Diagnostics holds SOC 2 Type 1 certification.

Neither SYNLAB UK & Ireland nor Quest Diagnostics holds SOC 2 Type 2 certification.

Neither SYNLAB UK & Ireland nor Quest Diagnostics holds ISO 27001 certification.

Neither SYNLAB UK & Ireland nor Quest Diagnostics holds PCI DSS certification.

Neither SYNLAB UK & Ireland nor Quest Diagnostics holds HIPAA certification.

Neither SYNLAB UK & Ireland nor Quest Diagnostics holds GDPR certification.

Latest Global CVEs (Not Company-Specific)

Description

Typemill is a flat-file, Markdown-based CMS designed for informational documentation websites. A reflected Cross-Site Scripting (XSS) exists in the login error view template `login.twig` of versions 2.19.1 and below. The `username` value can be echoed back without proper contextual encoding when authentication fails. An attacker can execute script in the login page context. This issue has been fixed in version 2.19.2.

Risk Information
cvss3
Base: 5.4
Severity: LOW
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
Description

A DOM-based Cross-Site Scripting (XSS) vulnerability exists in the DomainCheckerApp class within domain/script.js of Sourcecodester Domain Availability Checker v1.0. The vulnerability occurs because the application improperly handles user-supplied data in the createResultElement method by using the unsafe innerHTML property to render domain search results.

Description

A Remote Code Execution (RCE) vulnerability exists in Sourcecodester Modern Image Gallery App v1.0 within the gallery/upload.php component. The application fails to properly validate uploaded file contents. Additionally, the application preserves the user-supplied file extension during the save process. This allows an unauthenticated attacker to upload arbitrary PHP code by spoofing the MIME type as an image, leading to full system compromise.

Description

A UNIX symbolic link following issue in the jailer component in Firecracker version v1.13.1 and earlier and 1.14.0 on Linux may allow a local host user with write access to the pre-created jailer directories to overwrite arbitrary host files via a symlink attack during the initialization copy at jailer startup, if the jailer is executed with root privileges. To mitigate this issue, users should upgrade to version v1.13.2 or 1.14.1 or above.

Risk Information
cvss3
Base: 6.0
Severity: LOW
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H
cvss4
Base: 6.0
Severity: LOW
CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:N/SI:H/SA:H/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

An information disclosure vulnerability exists in the /srvs/membersrv/getCashiers endpoint of the Aptsys gemscms backend platform thru 2025-05-28. This unauthenticated endpoint returns a list of cashier accounts, including names, email addresses, usernames, and passwords hashed using MD5. As MD5 is a broken cryptographic function, the hashes can be easily reversed using public tools, exposing user credentials in plaintext. This allows remote attackers to perform unauthorized logins and potentially gain access to sensitive POS operations or backend functions.