Microsoft Teams Remote Code Execution Vulnerability

CVE-2025-53783 is a remote code execution vulnerability in Microsoft Teams (rated Important, CVSS 7.5).

1 version

Microsoft id: CVE-2025-53783
Products: Microsoft Teams
Severity: Important
Impact: Remote Code Execution
CVSS: 7.5
CVSS vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Exploited: No
Publicly disclosed: No
Exploitability: Exploitation Less Likely
Customer action required: Yes
Release: 2025-Aug
Assigned by: Microsoft
Weakness: CWE-122: Heap-based Buffer Overflow
MSRC revision: 1.1
Status pages: Microsoft Teams status
First captured by us: 13 Nov 2026, 15:49 UTC (from our first import of this list)
Microsoft last modified: 30 Oct 2025, 07:00 UTC
Source: Security updates · open the original at Microsoft

Microsoft's revision notes

Revision 1.0, 2025-08-12: Information published.
Revision 1.1, 2025-10-30: Updated product information in the Software Update table. This is an informational change only.

Heap-based buffer overflow in Microsoft Teams allows an unauthorized attacker to execute code over a network.

Security updates, 07:00 UTC, 30 Oct 2025

One version so far. If Microsoft edits it, each change shows here with what was removed and added.

First version we captured · 15:49 UTC, 13 Nov
The text as we first saw it
Seen by us 15:49 UTC, 13 Nov · Microsoft's timestamp 07:00 UTC, 30 Oct 2025 · Microsoft's page

Last updated 13 Nov 2026, 15:49 UTC