CVE-2026-45501

mediumCVSS 6.5covered by 1 sourcefirst seen 2026-06-09

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.

CSIRTS triage

What: Improper neutralization of input during web page generation allows an unauthorized attacker to perform spoofing over a network.
Who is affected: Deployments of Microsoft Exchange Server.
Urgency: Remediation is important due to the medium severity and potential for spoofing attacks.
Action: Apply the latest security patch for Microsoft Exchange Server.

AI-assisted analysis generated from the source advisory — verify against the original.

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Exploitation outlook

Low exploitation risk0.31% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 23% of all EPSS-scored CVEs.

Advisory coverage (1)

mediumCVE-2026-45501: Microsoft Exchange Server Spoofing Vulnerabilitymsrc · 2026-06-09

External references

NVD record for CVE-2026-45501

CVE.org record

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