CVE-2026-48582: CWE-862: Missing Authorization in Microsoft Microsoft Exchange Online
CVE-2026-48582 is a critical vulnerability in Microsoft Exchange Online involving missing authorization. This flaw allows an authorized attacker to elevate their privileges over a network, potentially leading to full compromise of confidentiality and integrity. An official fix is available from Microsoft to address this issue.
AI Analysis
Technical Summary
This vulnerability (CWE-862) in Microsoft Exchange Online is due to missing authorization checks, enabling an attacker with some level of authorization to escalate privileges remotely. The CVSS score of 9.6 reflects a network attack vector with low complexity, no user interaction, and high impact on confidentiality and integrity. Microsoft has issued an official fix for this vulnerability.
Potential Impact
An attacker who is already authorized in some capacity can exploit this vulnerability to elevate their privileges, potentially gaining unauthorized access to sensitive information and control within Microsoft Exchange Online. The confidentiality and integrity of the system are severely impacted, while availability is not affected.
Mitigation Recommendations
An official fix is available from Microsoft for this vulnerability. It is recommended to apply the vendor-provided patch promptly to remediate the issue. Since this is not a cloud service, administrators must ensure that their on-premises or managed Exchange Online environments are updated accordingly.
CVE-2026-48582: CWE-862: Missing Authorization in Microsoft Microsoft Exchange Online
Description
CVE-2026-48582 is a critical vulnerability in Microsoft Exchange Online involving missing authorization. This flaw allows an authorized attacker to elevate their privileges over a network, potentially leading to full compromise of confidentiality and integrity. An official fix is available from Microsoft to address this issue.
CVSS v3.1
Score 9.6critical
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CWE-862) in Microsoft Exchange Online is due to missing authorization checks, enabling an attacker with some level of authorization to escalate privileges remotely. The CVSS score of 9.6 reflects a network attack vector with low complexity, no user interaction, and high impact on confidentiality and integrity. Microsoft has issued an official fix for this vulnerability.
Potential Impact
An attacker who is already authorized in some capacity can exploit this vulnerability to elevate their privileges, potentially gaining unauthorized access to sensitive information and control within Microsoft Exchange Online. The confidentiality and integrity of the system are severely impacted, while availability is not affected.
Mitigation Recommendations
An official fix is available from Microsoft for this vulnerability. It is recommended to apply the vendor-provided patch promptly to remediate the issue. Since this is not a cloud service, administrators must ensure that their on-premises or managed Exchange Online environments are updated accordingly.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Microsoft Security Response Center
- Advisory Id
- msrc_CVE-2026-48582
- Cve Count
- 1
- Additional Cves
- []
- Cvss Version
- null
- Remediation Level
- official-fix
Threat ID: 6a35935ff198dc38c106860a
Added to database: 06/19/2026, 19:07:11 UTC
Last enriched: 07/29/2026, 21:05:28 UTC
Last updated: 07/31/2026, 21:27:09 UTC
Views: 464
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