CVE-2026-48582
Missing authorization in Microsoft Exchange Online allows an authorized attacker to elevate privileges over a network.
CSIRTS triage
- What
- This vulnerability allows an authorized attacker to elevate privileges over a network due to missing authorization.
- Who is affected
- Users of Microsoft Exchange Online.
- Urgency
- Remediation is critical due to the high severity and potential for privilege escalation.
- Action
- Apply the latest security updates from Microsoft.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.39% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 31% of all EPSS-scored CVEs.
Advisory coverage (1)
- criticalCVE-2026-48582: Microsoft Exchange Online Elevation of Privilege Vulnerabilitymsrc · 2026-06-09
External references
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