This Week in Cybersecurity (2025-12-04): Startup Cybersecurity Pulse Brief

Glen Armes
Dec 4, 2025
1 min read

Startup Lens

Startups continue to face the same threats as large enterprises with much fewer resources. Startups must have an on-demand cybersecuirty strategy to build a defendable cybersecuirty program for customers, regulators, and investors.

This week's activity shows:

Ransomware targeting critical services proves no organization is too small.
Contact data leaks increase phishing against teams and customers.
Chrome/7-Zip exploits are the easiest entryway into engineering laptops.
AI analytics breaches show the risk of misconfigured SaaS.

Threats Most Relevant to Startups

Credential Theft & Phishing

Consumer-platform breaches make it easier to impersonate employees or customers.

Engineering Endpoint Compromise

Chrome/7-Zip vulnerabilities are actively exploited.

SaaS Supply-Chain Risk

Gainsight/Salesforce cross-tenant issue shows SaaS connectors are high-risk.

Recommended Actions for Startups

Immediate

Enforce MFA and SSO from the start.
Patch all Chrome/7-Zip instances.
Educate engineers on high target software like Chrome/7-Zip.
Lock down GitHub and cloud IAM roles.

Strategic

Build a starter CIS IG1 security baseline.
Document SaaS vendor risk.
Formalize AI data protections.