CVE-2026-65667
Microsoft Teams Elevation of Privilege Vulnerability
CVE-2026-65667 is a critical vulnerability (CVSS 10.0) in Microsoft Teams, published August 6, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.80%, the 57th percentile. No source names a fixed version.
- Severity
- 10.0 CriticalCVSS 3.1, CVE List
- Exploit chance
- 0.80%EPSS, 57th percentile
- Exploitation
- None knownNot on CISA’s or ENISA’s lists
- Fixed in
- No fix listedNo source names one
Description
Missing authorization in Microsoft Teams allows an unauthorized attacker to elevate privileges over a network.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- None
Exploit likelihood
Affected products
What each source reports
CVE List Score used
Microsoft Teams Elevation of Privilege Vulnerability
Missing authorization in Microsoft Teams allows an unauthorized attacker to elevate privileges over a network.
- Record
CVE-2026-65667- CVSS 3.1
- 10.0 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N/E:U/RL:O/RC:C - Weakness
- CWE-862
- Updated
- 2026-11-10
EUVDEUVD-2026-54322
Missing authorization in Microsoft Teams allows an unauthorized attacker to elevate privileges over a network.
- Record
EUVD-2026-54322- CVSS 3.1
- 10.0 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N/E:U/RL:O/RC:C - Updated
- 2026-11-10
GitHub AdvisoriesGHSA-qf3x-g8x3-rcjc
Missing authorization in Microsoft Teams allows an unauthorized attacker to elevate privileges...
Missing authorization in Microsoft Teams allows an unauthorized attacker to elevate privileges over a network.
- Record
GHSA-qf3x-g8x3-rcjc- CVSS 3.1
- 10.0 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N - Weakness
- CWE-862
- Updated
- 2026-11-02
NVD
Missing authorization in Microsoft Teams allows an unauthorized attacker to elevate privileges over a network.
- Record
CVE-2026-65667- CVSS 3.1
- 10.0 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N - Weakness
- CWE-862
- Updated
- 2026-11-02
History
| Recorded | Changed | Sources |
|---|---|---|
| facts | EUVD | |
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.