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

CVE-2025-53783

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

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

HIGH · CVSS 7.5 EPSS 0.00188
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules5 YARA rules0
⬡

Weakness Classification

CWE-122Heap-based Buffer Overflow
▤

Affected Products & Versions

8
microsoft dynamics 365 guides< 907.2505.29001.0
microsoft dynamics 365 remote assist< 316.2505.28001
microsoft teams< 1.0.0.2025102802
microsoft teams< 7.10.1
microsoft teams< 25122.1207.3700.1444
microsoft teams< 25122.1415.3698.6812
microsoft teams panels< 1.0.97.2025102203
microsoft teams phones< 1.0.94.2025168802
◈

Sigma Hunt Rules

5
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
producthighMalicious DLL File Dropped in the Teams or OneDrive Folder
producthighSuspicious Teams Application Related ObjectAcess Event
productmediumMicrosoft Teams Sensitive File Access By Uncommon Applications
productmediumRenamed Microsoft Teams Execution
productmediumPotentially Suspicious Command Targeting Teams Sensitive Files
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Scoring & Timeline

7.5
HIGH · CVSS v3.1 · secure@microsoft.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD12 Aug 2025 · 06:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
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Vendor Advisories

1
msrcCVE-2025-53783Remote Code Execution
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