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Vulnerability record · CVE-2026-48582 · published 19 June 2026

CVE-2026-48582: Microsoft exchange online missing authorization vulnerability

Microsoft · Exchange Online

Missing authorization in Microsoft Exchange Online allows an authorized attacker to elevate privileges over a network.

9.6 CVSS 3.1 Critical EPSS 0.69% · top 49.2% CWE-862 · Missing authorization
9.6CVSS 3.1 base score
0.69%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
1References
24 Jun 2026Last modified by NVD

Description

Missing authorization in Microsoft Exchange Online allows an authorized attacker to elevate privileges over a network.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-48582 Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

10.0CVE-2026-65801Microsoft exchange online server-side request forgery (ssrf) vulnerabilityServer-side request forgery (ssrf) in Microsoft Exchange Online allows an unauthorized attacker to elevate privileges over a network.EPSS 0.90%10.0CVE-2026-56191Microsoft exchange online improper authentication vulnerabilityImproper authentication in Microsoft Exchange Online allows an unauthorized attacker to perform tampering over a network.EPSS 0.90%8.8CVE-2026-54998Microsoft exchange online incorrect authorization vulnerabilityIncorrect authorization in Microsoft Exchange Online allows an authorized attacker to elevate privileges over a network.EPSS 0.78%7.5CVE-2026-48579Microsoft exchange online improper authorization vulnerabilityImproper authorization in Microsoft Exchange Online allows an unauthorized attacker to disclose information over a network.EPSS 1.00%9.9CVE-2026-84869ScreenConnect client allows unauthorized file transfer and execution in remote sessionsA flaw in the ConnectWise ScreenConnect client lets files be transferred and executed inside an active remote session without authorization or Host c…KEVEPSS 0.92%analysed7.8CVE-2022-0492Linux kernel cgroups v1 release_agent privilege escalation and container escapeThe Linux kernel's cgroup_release_agent_write in kernel/cgroup/cgroup-v1.c mishandles authorization, letting the cgroups v1 release_agent feature be …KEVEPSS 5.5%analysed9.9CVE-2024-57726SimpleHelp missing authorization lets low-privilege technicians escalate to adminSimpleHelp remote support software v5.5.7 and earlier fails to properly authorize API key creation, allowing low-privilege technicians to mint API ke…KEVEPSS 67%analysed8.8CVE-2023-52163Digiever DS-2105 Pro time_tzsetup.cgi command injectionDigiever DS-2105 Pro firmware 3.1.0.71-11 exposes time_tzsetup.cgi to command injection, and the record also maps the issue to CWE-862 missing author…KEVEPSS 97%analysed

Source: NIST National Vulnerability Database (record CVE-2026-48582), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.