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Stay informed on the latest data breach incidents and security breaches. Protect your information with our up-to-date breach news and analysis.

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Background for this topic.

Breach means unauthorized access to a computer system or network that exposes or steals sensitive data like personal details, passwords, or proprietary information. Attackers often exploit software flaws, weak passwords, or social engineering to gain entry. Breaches can also result from insiders misusing access or accidental data exposure.

Understanding breaches is crucial because they reveal weaknesses in security controls and can lead to data theft or operational disruption. Effective defenses include promptly patching vulnerabilities, enforcing strong authentication, and segmenting networks to limit attacker movement. Detecting breaches quickly through monitoring and logging helps contain damage and guide targeted remediation efforts to secure affected systems and data.

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Many things have changed since 2018, such as the names of the companies in the Fortune 100 list. But one aspect of that vaunted list that hasn't shifted much since is that very few of these companies list any security professionals within their top executive ranks. The next time you receive a breach notification letter that invariably says a company you trusted places a top priority on customer security and privacy, consider this: Only four of the Fortune 100 companies currently list a security professional in the executive leadership pages of their websites. This is actually down from five of the Fortune 100 in 2018, the last time KrebsOnSecurity performed this analysis.

The US government is warning that threat actors breached the network of a U.S. organization in the critical infrastructure sector after exploiting a zero-day RCE vulnerability currently identified as CVE-2023-3519, a critical-severity issue in NetScaler ADC and Gateway that Citrix patched this week. [...]

Threat actors have breached the network of a U.S. organization in the critical infrastructure sector after exploiting a zero-day RCE vulnerability currently identified as CVE-2023-3519, a critical-severity issue in NetScaler ADC and Gateway that Citrix patched this week. [...]