Overview
A remote code execution vulnerability exists in the way that the Microsoft Server Message Block 3.1.1 (SMBv3) protocol handles certain requests. An attacker who successfully exploited the vulnerability could gain the ability to execute code on the target server or client.
https://nvd.nist.gov/vuln/detail/CVE-2020-0796
Key Details
| Property | Value |
|---|---|
| CVE ID | CVE-2020-0796 |
| Vendor / Product | Microsoft — SMBv3 |
| NVD Published | 2020-03-12 |
| NVD Last Modified | 2025-10-29 |
| CVSS 3.1 Score | 10 |
| CVSS 3.1 Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H |
| Severity | CRITICAL |
| CWE | CWE-119 |
| CISA KEV Added | 2022-02-10 |
| CISA KEV Deadline | 2022-08-10 |
| Known Ransomware Use | ⚠️ Yes |
CVSS 3.1 Breakdown
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High
Required Action
CISA BOD 22-01 Deadline: 2022-08-10.
Apply updates per vendor instructions.
Timeline
| Date | Event |
|---|---|
| 2022-02-10 | Added to CISA Known Exploited Vulnerabilities catalog |
| 2022-08-10 | CISA BOD 22-01 remediation deadline |
References
| Resource | Type |
|---|---|
| NVD — CVE-2020-0796 | Vulnerability Database |
| CISA KEV Catalog Entry | US Government |