Corporate security and data breaches: how to reduce risk

A data breach does not always begin with a sophisticated attack. It may start with a reused password, an email sent to the wrong recipient, a public sharing link, a lost device or an old account that remained active. Corporate security therefore needs to combine technology, processes and human behavior.

When personal information is involved, the response must also consider the privacy laws and notification rules that apply to the organization. In Brazil, the ANPD defines criteria for assessing incidents and, when a confirmed event may cause relevant risk or harm, requires notification to the Authority and affected individuals within three business days. The controller must evaluate each event according to its circumstances.

What is a security incident?

A security incident is a confirmed event that compromises confidentiality, integrity, availability or authenticity. It can involve unauthorized access, loss, alteration, destruction, disclosure or unavailability of information. A vulnerability alone is not necessarily an incident, but an exploited weakness can quickly become one.

Address the most common causes first

• Enable multifactor authentication, especially for email, cloud and remote access;
• Review accounts, privileges and access held by former employees and vendors;
• Keep systems, applications, routers and devices up to date;
• Protect backups from alteration and test restoration regularly;
• Encrypt laptops, mobile devices and sensitive communications;
• Classify information and restrict public sharing;
• Train employees to recognize phishing and report mistakes quickly.

These measures work best as a continuous routine. An annual review cannot keep up with staff changes, new systems, vendor transitions and vulnerabilities that emerge throughout the year.

Prepare before an incident

An incident-response plan should identify who coordinates the work, how to contact IT, executives, legal, communications and privacy teams, which vendors must be notified and where emergency contacts are stored. It should also explain how to preserve evidence without delaying containment.

Tabletop exercises reveal questions that would otherwise consume time during a real crisis: who can shut down a critical system? How will the company operate if email is unavailable? Is there an offline contact list? Who assesses the impact on affected people?

The first response steps

1. Confirm and record: document when the event was detected, the systems involved and available indicators.
2. Contain: isolate devices, revoke sessions, reset credentials and block compromised access.
3. Preserve evidence: retain logs, images and records required for investigation.
4. Assess impact: identify affected data, people, operations and third parties.
5. Eradicate and recover: remove the cause, fix weaknesses and restore services in a controlled manner.
6. Communicate: meet applicable obligations with clear and consistent information.

Learn so the event does not repeat

After recovery, the company should document decisions, update controls and verify that promised actions were completed. Metrics such as detection time, containment time, unpatched systems and multifactor coverage make progress visible.

How CSP can help

CSP can support risk assessments, endpoint and identity protection, backups, monitoring and incident-response readiness. Contact CSP to review environmental weaknesses and build a strategy that helps prevent data leaks and quickly contain their impact.