CVE-2026-47645

highCVSS 8.8covered by 1 sourcefirst seen 2026-06-09

Url redirection to untrusted site ('open redirect') in Microsoft 365 Copilot's Business Chat allows an unauthorized attacker to elevate privileges over a network.

CSIRTS triage

What: An open redirect vulnerability allows unauthorized privilege elevation.
Who is affected: Users of Microsoft 365 Copilot's Business Chat are affected.
Urgency: High urgency for remediation due to the potential for privilege escalation and a CVSS score of 8.8.
Action: Apply the latest security updates to Microsoft 365 Copilot.

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

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Exploitation outlook

Low exploitation risk0.41% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 33% of all EPSS-scored CVEs.

Advisory coverage (1)

highCVE-2026-47645: Microsoft 365 Copilot's Business Chat Elevation of Privilege Vulnerabilitymsrc · 2026-06-09

External references

NVD record for CVE-2026-47645

CVE.org record

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