CSIRTS // UNIFIED SECURITY ADVISORY FEEDSYS ● ONLINE · POWERED BY INTELFUSIONS.COM

← Back to feed

CVE-2026-47631: Microsoft Exchange Server Spoofing Vulnerability

highCVSS 8.1CVE-2026-47631
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

vendor: Microsoftproduct: Exchange ServerCross-site scripting
What
Improper neutralization of input during web page generation allows an unauthorized attacker to perform spoofing over a network.
Who is affected
Users of Microsoft Exchange Server are affected.
Urgency
Remediation is urgent due to the high severity and potential for exploitation via spoofing.
Action
Apply the latest security updates for Microsoft Exchange Server.

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

⚡ Watch Exchange Server

Get an email when a new Exchange Server advisory drops — max one per day, one-click unsubscribe.

Details

Source
Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity
high — CVSS 8.1
Published
2026-06-09
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-47631

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2026-47631coverage & exploitation statusNVD · CVE.org

Recent advisories for Microsoft Exchange Server

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

More from Microsoft Security Response Center