Security readout for executives and security teams
CVE-2020-0796 is a critical Microsoft SMBv3 flaw in Windows 10 and Windows Server Core 1903/1909. An unauthenticated attacker could trigger remote code execution over the network. Because CISA lists it in KEV and public proof-of-concept references exist, exposed or unpatched systems deserve urgent attention. Risk is highest where affected Windows 10 or Windows Server Core 1903/1909 systems run SMBv3 and are reachable from untrusted networks. Internal exposure also matters because SMB flaws can enable rapid lateral movement after initial access. Treat this as an urgent remediation item. It is remotely exploitable, unauthenticated, rated CVSS 10.0, and listed by CISA as known exploited. Focus first on externally reachable SMB and critical internal Windows servers or workstations. Mitigation focus: Review Microsoft MSRC guidance for CVE-2020-0796 and apply vendor-approved fixes.; Prioritize affected Windows 10 and Windows Server Core 1903/1909 assets.; Reduce SMB exposure to untrusted networks while remediation is underway..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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CWE-119: Exact CWE lookup
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Open ATT&CK lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2020-0796 mapping review
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Open ATT&CK lookup- Severity
- Critical
- CVSS
- 10 (3.1)
- Known Exploited
- Yes
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CISA KEV status
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H3.96Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
10CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0796CVE reference · x_refsource_MISC
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-0796CVE reference · government-resource
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Restriction of Operations within the Bounds of a Memory Buffer
Improper Restriction of Operations within the Bounds of a Memory Buffer represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.