- Medium 6.1
- Known exploited (CISA KEV)
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.
Scores
The facts
- Published
- 14 May 2026
- Last changed
- 17 June 2026
- NVD status
- Analyzed
- Severity
- Medium, CVSS 6.1 out of 10 (version 3.1)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - Weakness
- Affects
- microsoft exchange server
- microsoft exchange server subscription edition
- Known exploited
- Yes. CISA added it to the Known Exploited Vulnerabilities catalogue on 15 May 2026.
- EPSS
- 0.5% chance of exploitation activity in the next 30 days (percentile 43).
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