CVE catalog
CVE-2026-42897
Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Exchange Server allows an unauthorized attacker to perform spoofing over a network.
- Severity
- High · CVSS 8.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N - Published
- Source
- [NVD] · [CVE record]
- Exploitation
- CISA Known Exploited Vulnerabilities
- EPSS
- 70.66% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Cpe | exchange_server | Not reported | Not reported | unknown |
| Cpe | exchange_server | Not reported | Not reported | unknown |
Fixed-version evidence
OpenFactory catalog packages
No matching packages in this catalog.
Observed:
References
- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42897]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-42897]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-1536.json]
- [https://www.cisa.gov/known-exploited-vulnerabilities-catalog]
- [https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-42897]
[CERT-Bund public advisories] · [CISA Known Exploited Vulnerabilities (OSINT)] · [FIRST EPSS] · [National Vulnerability Database (NVD)]