CVE-2026-65667

Published Aug 7, 2026

Last updated a month ago

CVSS critical 10.0

Overview

Description
Missing authorization in Microsoft Teams allows an unauthorized attacker to elevate privileges over a network.
Source
secure@microsoft.com
NVD status
Analyzed
CNA Tags
exclusively-hosted-service
Products
teams

Risk scores

CVSS 3.1

Type
Secondary
Base score
10
Impact score
5.8
Exploitability score
3.9
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
Severity
CRITICAL

Weaknesses

secure@microsoft.com
CWE-862

Social media

Hype score
Not currently trending

  1. CVE-2026-65667 - Critical privilege escalation in Microsoft Teams. Missing authorization enables network-based elevation. CVSS 10. Patch unavailable - monitor for updates. #CVE #Microsoft #infosec https://t.co/pkU37WFAp6 #infosec #cybersecurity #CVE #Linux #infosec #infosec

    @HugoValters

    9 Aug 2026

    54 Impressions

    0 Retweets

    0 Likes

    0 Bookmarks

    0 Replies

    0 Quotes

Configurations

Related CVEs

  1. Improper limitation of a pathname to a restricted directory ('path traversal') in Microsoft Teams for Android allows an unauthorized attacker to execute code over a network.•CVE-2026-65768
  2. Exposure of sensitive information to an unauthorized actor in Microsoft Teams Mobile allows an unauthorized attacker to disclose information over a network.•CVE-2026-65769
  3. Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Teams for Android allows an authorized attacker to perform spoofing over a network.•CVE-2026-65767
  4. Improper verification of cryptographic signature in Microsoft Teams allows an unauthorized attacker to perform spoofing over a network.•CVE-2026-62918
  5. Improper authentication in Microsoft Teams allows an authorized attacker to elevate privileges over a network.•CVE-2026-62896

References

Sources include official advisories and independent security research.