CVE-2026-62896: CWE-287: Improper Authentication in Microsoft Microsoft Teams
Improper authentication in Microsoft Teams allows an authorized attacker to elevate privileges over a network.
AI Analysis
Technical Summary
This vulnerability (CWE-287) in Microsoft Teams involves improper authentication, enabling an attacker with some level of authorization to escalate their privileges remotely over the network. The flaw impacts confidentiality and integrity with a high severity score (CVSS 9.6). Microsoft has published an official fix to resolve this issue. The vulnerability does not require user interaction and has no known active exploitation at this time.
Potential Impact
An attacker who is already authorized can elevate their privileges, potentially gaining higher access rights within Microsoft Teams. This can lead to significant confidentiality and integrity breaches. Availability is not impacted. There are no reports of active exploitation in the wild.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the patch provided by Microsoft as detailed in the vendor advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62896 to remediate this vulnerability.
CVE-2026-62896: CWE-287: Improper Authentication in Microsoft Microsoft Teams
Description
Improper authentication in Microsoft Teams allows an authorized attacker to elevate privileges over a network.
CVSS v3.1
Score 9.6critical
Affected software
Microsoft
Microsoft Teams
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CWE-287) in Microsoft Teams involves improper authentication, enabling an attacker with some level of authorization to escalate their privileges remotely over the network. The flaw impacts confidentiality and integrity with a high severity score (CVSS 9.6). Microsoft has published an official fix to resolve this issue. The vulnerability does not require user interaction and has no known active exploitation at this time.
Potential Impact
An attacker who is already authorized can elevate their privileges, potentially gaining higher access rights within Microsoft Teams. This can lead to significant confidentiality and integrity breaches. Availability is not impacted. There are no reports of active exploitation in the wild.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the patch provided by Microsoft as detailed in the vendor advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62896 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-07-14T21:25:21.034Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62896","vendor":"Microsoft"}]
Threat ID: 6a752657bf8831d539809a5c
Added to database: 08/07/2026, 00:27:03 UTC
Last enriched: 08/14/2026, 14:05:04 UTC
Last updated: 09/17/2026, 22:12:07 UTC
Views: 87
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