CVE-2026-62915: CWE-862: Missing Authorization in Microsoft Microsoft Exchange Server 2016 Cumulative Update 23
Missing authorization in Microsoft Exchange Server allows an authorized attacker to bypass a security feature over a network.
AI Analysis
Technical Summary
This vulnerability (CWE-862) in Microsoft Exchange Server 2016 CU23 involves missing authorization checks, enabling an authorized attacker with low privileges to bypass certain security controls over the network. The CVSS 3.1 base score is 6.5, reflecting network attack vector, low attack complexity, and no user interaction required. The impact is limited to integrity, with no confidentiality or availability impact. Microsoft has released an official fix for this vulnerability.
Potential Impact
An attacker with authorized access and low privileges can bypass security features, potentially allowing unauthorized actions that compromise system integrity. There is no impact on confidentiality or availability according to the CVSS vector. No known exploits are reported in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. It is recommended to apply the security update for Microsoft Exchange Server 2016 Cumulative Update 23 as provided in the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62915.
CVE-2026-62915: CWE-862: Missing Authorization in Microsoft Microsoft Exchange Server 2016 Cumulative Update 23
Description
Missing authorization in Microsoft Exchange Server allows an authorized attacker to bypass a security feature over a network.
CVSS v3.1
Score 6.5medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CWE-862) in Microsoft Exchange Server 2016 CU23 involves missing authorization checks, enabling an authorized attacker with low privileges to bypass certain security controls over the network. The CVSS 3.1 base score is 6.5, reflecting network attack vector, low attack complexity, and no user interaction required. The impact is limited to integrity, with no confidentiality or availability impact. Microsoft has released an official fix for this vulnerability.
Potential Impact
An attacker with authorized access and low privileges can bypass security features, potentially allowing unauthorized actions that compromise system integrity. There is no impact on confidentiality or availability according to the CVSS vector. No known exploits are reported in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. It is recommended to apply the security update for Microsoft Exchange Server 2016 Cumulative Update 23 as provided in the Microsoft Security Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62915.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-07-14T21:25:21.036Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62915","vendor":"Microsoft"}]
Threat ID: 6a7b5825bf8831d53915622d
Added to database: 08/11/2026, 17:13:09 UTC
Last enriched: 08/11/2026, 20:57:20 UTC
Last updated: 08/12/2026, 01:41:02 UTC
Views: 6
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