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 (CVE-2026-62896) in Microsoft Teams involves improper authentication (CWE-287) that enables an attacker with some level of authorization to escalate their privileges remotely over the network. The CVSS 3.1 vector indicates the attack can be performed with low attack complexity, no user interaction, and results in a complete compromise of confidentiality and integrity. The vendor has released an official fix to address this vulnerability.
Potential Impact
An attacker who is authorized on the network can exploit this vulnerability to elevate their privileges, potentially gaining unauthorized access to sensitive information and control within Microsoft Teams. The vulnerability does not impact availability. The critical CVSS score reflects the severe confidentiality and integrity impact.
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 improper authentication issue in Microsoft Teams.
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 (CVE-2026-62896) in Microsoft Teams involves improper authentication (CWE-287) that enables an attacker with some level of authorization to escalate their privileges remotely over the network. The CVSS 3.1 vector indicates the attack can be performed with low attack complexity, no user interaction, and results in a complete compromise of confidentiality and integrity. The vendor has released an official fix to address this vulnerability.
Potential Impact
An attacker who is authorized on the network can exploit this vulnerability to elevate their privileges, potentially gaining unauthorized access to sensitive information and control within Microsoft Teams. The vulnerability does not impact availability. The critical CVSS score reflects the severe confidentiality and integrity impact.
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 improper authentication issue in Microsoft Teams.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-x274-p4gq-2363
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-62896"]
- Database Specific Severity
- CRITICAL
- Cvss Version
- 3.1
- Remediation Level
- official-fix
- State
- PUBLISHED
Threat ID: 6a75739abf8831d539d91a4f
Added to database: 08/07/2026, 05:56:42 UTC
Last enriched: 08/15/2026, 18:10:03 UTC
Last updated: 09/21/2026, 22:01:36 UTC
Views: 59
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