CVE-2025-53783: Microsoft Dynamics 365 Guides

High severity, CVSS 7.5. EPSS: 0.8% chance of exploitation in the next 30 days.

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

Affected products

• Microsoft Dynamics 365 Guides: before 907.2505.29001.0 (fixed in 907.2505.29001.0)
• Microsoft Dynamics 365 Remote Assist: before 316.2505.28001 (fixed in 316.2505.28001)
• Microsoft Teams: before 1.0.0.2025102802 (fixed in 1.0.0.2025102802); before 7.10.1 (fixed in 7.10.1); before 25122.1207.3700.1444 (fixed in 25122.1207.3700.1444); before 25122.1415.3698.6812 (fixed in 25122.1415.3698.6812)
• Microsoft Teams Panels: before 1.0.97.2025102203 (fixed in 1.0.97.2025102203)
• Microsoft Teams Phones: before 1.0.94.2025168802 (fixed in 1.0.94.2025168802)

Published 2025-08-12. Last modified 2026-06-17.