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 that enables an attacker with some level of authorization to escalate their privileges remotely over the network. The CVSS 3.1 score of 9.6 reflects its critical severity, with network attack vector, low attack complexity, no user interaction, and scope change. Microsoft has published an official fix for this vulnerability as detailed in their security advisory.
Potential Impact
An attacker who is already authorized can exploit this flaw to gain elevated privileges, potentially compromising confidentiality and integrity of data within Microsoft Teams. There is no impact on availability. This could lead to unauthorized access to sensitive information or actions performed with higher privileges than intended.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided in the Microsoft 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
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CWE-287) in Microsoft Teams involves improper authentication that enables an attacker with some level of authorization to escalate their privileges remotely over the network. The CVSS 3.1 score of 9.6 reflects its critical severity, with network attack vector, low attack complexity, no user interaction, and scope change. Microsoft has published an official fix for this vulnerability as detailed in their security advisory.
Potential Impact
An attacker who is already authorized can exploit this flaw to gain elevated privileges, potentially compromising confidentiality and integrity of data within Microsoft Teams. There is no impact on availability. This could lead to unauthorized access to sensitive information or actions performed with higher privileges than intended.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided in the Microsoft 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: 08/07/2026, 00:41:56 UTC
Last updated: 08/07/2026, 01:42:00 UTC
Views: 2
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