Microsoft Exchange Zero-Day Under Attack, No Patch Available
CVE-2026-42897 stems from a cross-site scripting (XSS) vulnerability and can allow an attacker to compromise Outlook Web Access (OWA) mailboxes.
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Background for this topic.
In the realm of information security, Compromise is the event where unauthorized access to a system has been gained or when the integrity of data or resources has been breached. This could signify a security incident where sensitive information has been leaked, altered, destroyed, or where an unauthorized user has successfully infiltrated a network or system, potentially commandeering controls or accessing sensitive areas.
Compromise typically occurs due to vulnerabilities within the system being exploited, such as software flaws, inadequate security policies, or user errors. Compromises can have a range of consequences, from the theft of confidential information, financial loss, damage to an organization's reputation, and more. It is a central concern for information security professionals, who work to prevent, detect, and respond to such breaches, protecting assets from unauthorized access and ensuring the confidentiality, integrity, and availability of data.
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CVE-2026-42897 stems from a cross-site scripting (XSS) vulnerability and can allow an attacker to compromise Outlook Web Access (OWA) mailboxes.