CVE-2026-41106: Microsoft 365 Copilot Elevation of Privilege Vulnerability

criticalCVSS 9.3CVE-2026-41106

Url redirection to untrusted site ('open redirect') in M365 Copilot allows an unauthorized attacker to elevate privileges over a network.

CSIRTS triage

vendor: Microsoft product: Microsoft 365 Copilot Privilege escalation

What: An open redirect vulnerability allows unauthorized privilege elevation.
Who is affected: Users of Microsoft 365 Copilot are affected.
Urgency: Remediation is critical due to the high severity and potential for exploitation.
Action: Apply the latest security updates for Microsoft 365 Copilot.

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

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Details

Source: Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity: critical — CVSS 9.3
Published: 2026-07-02
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-41106

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.

Low exploitation riskCVE-2026-411060.53% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 41% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-41106	coverage & exploitation status	NVD · CVE.org

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