# CVE-2026-42897: A Microsoft bug is being used in attacks

Status: Being used now (CISA KEV, added 2026-05-15)
Who: 
Do this: 

## Agent prompt (read-only)
Read-only check, change nothing, send nothing anywhere.
Is Microsoft Microsoft (CVE-2026-42897) installed or running on this machine or in this project?
1. Find every copy and its version (apps, packages, containers, lockfiles).
2. Compare each version against the vendor's fixed version for CVE-2026-42897. Quote the vendor page you used.
3. Report a table: where, version, fixed version, status (exposed / fixed / not installed / unsure).
4. List the exact update steps, but do not run them.

## Official 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.

## Sources
- 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
- https://nvd.nist.gov/vuln/detail/CVE-2026-42897

Generated by isitexploited.org from public sources. Verify version numbers against the vendor before acting.