{"cvss":0.0,"datePublished":"2026-05-15","dateUpdated":"2026-05-15","description":"Microsoft Exchange Server contains a cross-site scripting vulnerability during web page generation in Outlook Web Access and when certain interaction conditions are met, arbitrary JavaScript can be executed in the browser context.","dueDate":"2026-05-29","id":"CVE-2026-42897","kev_catalogs":["cisa"],"knownRansomwareCampaignUse":"Unknown","notes":"https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2026-42897 ; https://learn.microsoft.com/en-us/exchange/plan-and-deploy/post-installation-tasks/security-best-practices/exchange-emergency-mitigation-service ; https://nvd.nist.gov/vuln/detail/CVE-2026-42897","product":"Microsoft","requiredAction":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","severity":"HIGH","source":"cisa_known_exploited","title":"Microsoft Exchange Server Cross-Site Scripting Vulnerability","vendor":"Microsoft"}