← Vulnerability feed

Vulnerability record · CVE-2026-65667 · published 7 August 2026

CVE-2026-65667: Microsoft teams missing authorization vulnerability

Microsoft · Teams

Missing authorization in Microsoft Teams allows an unauthorized attacker to elevate privileges over a network.

10.0 CVSS 3.1 Critical EPSS 0.80% · top 45.3% CWE-862 · Missing authorization
10.0CVSS 3.1 base score
0.80%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
1References
11 Aug 2026Last modified by NVD

Description

Missing authorization in Microsoft Teams allows an unauthorized attacker to elevate privileges over a network.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-65667 Vendor Advisory

Track CVE-2026-65667 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.8CVE-2023-4863libwebp Heap Buffer Overflow via Crafted WebP ImageA heap buffer overflow in libwebp allows an out-of-bounds memory write when processing a crafted WebP image. It affects Google Chrome before 116.0.58…KEVEPSS 100%analysed9.8CVE-2026-65768Microsoft teams path traversal vulnerabilityImproper limitation of a pathname to a restricted directory ('path traversal') in Microsoft Teams for Android allows an unauthorized attacker to exec…EPSS 0.94%9.8CVE-2024-42004Microsoft teams improper verification of cryptographic signature vulnerabilityA library injection vulnerability exists in Microsoft Teams (work or school) 24046.2813.2770.1094 for macOS. A specially crafted library can leverage…EPSS 0.81%9.8CVE-2024-41138Microsoft teams improper verification of cryptographic signature vulnerabilityA library injection vulnerability exists in the com.microsoft.teams2.modulehost.app helper app of Microsoft Teams (work or school) 24046.2813.2770.10…EPSS 0.91%9.8CVE-2024-41145Microsoft teams improper verification of cryptographic signature vulnerabilityA library injection vulnerability exists in the WebView.app helper app of Microsoft Teams (work or school) 24046.2813.2770.1094 for macOS. A speciall…EPSS 0.80%9.6CVE-2026-62896Microsoft teams improper authentication vulnerabilityImproper authentication in Microsoft Teams allows an authorized attacker to elevate privileges over a network.EPSS 0.69%8.8CVE-2023-29328Microsoft teams use after free vulnerabilityMicrosoft Teams Remote Code Execution VulnerabilityEPSS 2.2%8.8CVE-2023-29330Microsoft teams use after free vulnerabilityMicrosoft Teams Remote Code Execution VulnerabilityEPSS 2.0%

Source: NIST National Vulnerability Database (record CVE-2026-65667), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.