CVE-2026-48582: CWE-862: Missing Authorization in Microsoft Microsoft Exchange Online
Missing authorization in Microsoft Exchange Online allows an authorized attacker to elevate privileges over a network.
AI Analysis
Technical Summary
CVE-2026-48582 is a critical security vulnerability classified as CWE-862 (Missing Authorization) affecting Microsoft Exchange Online. The flaw permits an attacker with some level of authorization to escalate their privileges remotely, leading to a complete compromise of confidentiality and integrity of the system. The vulnerability has a CVSS 3.1 base score of 9.6, indicating high severity with network attack vector, low attack complexity, and no user interaction required. Microsoft has issued an official fix to remediate this vulnerability.
Potential Impact
An attacker with authorized access can exploit this vulnerability to elevate privileges, potentially gaining full control over sensitive data and system integrity within Microsoft Exchange Online. This could lead to unauthorized disclosure or modification of information.
Mitigation Recommendations
An official fix is available from Microsoft to remediate this vulnerability. It is recommended to apply the vendor-provided patch promptly to mitigate the risk. Since this is not a cloud service vulnerability, administrators must ensure the update is applied in their environment.
CVE-2026-48582: CWE-862: Missing Authorization in Microsoft Microsoft Exchange Online
Description
Missing authorization in Microsoft Exchange Online allows an authorized attacker to elevate privileges over a network.
CVSS v3.1
Score 9.6critical
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-48582 is a critical security vulnerability classified as CWE-862 (Missing Authorization) affecting Microsoft Exchange Online. The flaw permits an attacker with some level of authorization to escalate their privileges remotely, leading to a complete compromise of confidentiality and integrity of the system. The vulnerability has a CVSS 3.1 base score of 9.6, indicating high severity with network attack vector, low attack complexity, and no user interaction required. Microsoft has issued an official fix to remediate this vulnerability.
Potential Impact
An attacker with authorized access can exploit this vulnerability to elevate privileges, potentially gaining full control over sensitive data and system integrity within Microsoft Exchange Online. This could lead to unauthorized disclosure or modification of information.
Mitigation Recommendations
An official fix is available from Microsoft to remediate this vulnerability. It is recommended to apply the vendor-provided patch promptly to mitigate the risk. Since this is not a cloud service vulnerability, administrators must ensure the update is applied in their environment.
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
- Remediation Level
- official-fix
Threat ID: 6a35935ff198dc38c106860a
Added to database: 06/19/2026, 19:07:11 UTC
Last enriched: 08/14/2026, 12:53:36 UTC
Last updated: 09/14/2026, 22:01:34 UTC
Views: 576
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