An advisory in cybersecurity is a formal notification document that alerts organizations and individuals about specific security vulnerabilities, threats, or risks affecting software, hardware, or systems. These critical communications are typically issued by software vendors, government security agencies (such as CISA), or independent security researchers when new weaknesses are discovered or active exploitation campaigns are detected. Each advisory provides detailed technical information about the identified issue, including its severity rating, affected systems, and potential impact on organizational security.

Beyond identifying threats, advisories serve as actionable intelligence by offering comprehensive remediation guidance, such as available patches, recommended configuration changes, and defensive strategies. This enables security teams to assess their exposure, prioritize responses, and implement protective measures before attackers can exploit vulnerabilities. By providing timely, structured information, advisories form a cornerstone of effective vulnerability management and threat intelligence programs, helping organizations maintain a proactive security posture and protect their digital assets against evolving cyber threats.