{"cveID":"CVE-2026-42897","vendorProject":"Microsoft","product":"Microsoft","vulnerabilityName":"Microsoft Exchange Server Cross-Site Scripting Vulnerability","dateAdded":"2026-05-15","shortDescription":"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.","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.","dueDate":"2026-05-29","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","cwes":["CWE-79"],"year":2026,"state":"unmapped","stale_reasons":[],"mappings":[],"techniques":[],"mapping_types":[],"has_exploitation_technique":false,"mapping_attack_versions":[],"mapping_domains":[],"sigma_coverage":null,"sigma_rules_tagged_cve":[],"added_after_mapping_snapshot":true,"_source":"kevmap","_built":"2026-08-23 05:47 UTC","_attack_version":"19.2"}