Security readout for executives and security teams
Plain-English summary
CVE-2020-0838 is a Windows NTFS privilege escalation flaw. A user who can already log on locally could run a specially crafted application and gain elevated control. This is not a remote entry point, but it can turn a compromised standard account into a much more damaging breach.
Executive priority
Treat this as a high-priority patching and exposure-reduction item, especially where users share Windows systems or where local compromise could reach privileged infrastructure.
Technical view
Microsoft describes improper NTFS access checking that allows local elevation of privilege. Exploitation requires local logon and execution of a crafted application. The supplied CVSS 3.1 score is 7.8, with low attack complexity, low privileges required, no user interaction, and high confidentiality, integrity, and availability impact.
Likely exposure
Exposure is likely on unpatched Windows 7 SP1, Windows 10 versions 1507 through 2004, Windows Server 2016, Windows Server 2019, and related Server Core releases listed in the source bundle.
Exploitation context
The source bundle does not show CISA KEV listing or active exploitation. The CVSS temporal vector indicates proof-of-concept maturity, but no source here provides exploit details or confirms real-world use.
Researcher notes
Rely on MSRC for authoritative affected-build and update mapping. The provided affected CPE data appears inconsistent in places, so validate against Microsoft guidance before making asset decisions.
Mitigation direction
- Apply the Microsoft security update for CVE-2020-0838.
- Check MSRC for the exact update applicable to each Windows build.
- Prioritize shared workstations, VDI, jump hosts, and multi-user servers.
- Limit local logon rights to users who need them.
- Review endpoint privilege controls and application allowlisting coverage.
Validation and detection
- Inventory systems running the affected Windows versions listed in the source bundle.
- Confirm the relevant Microsoft update is installed on each affected host.
- Compare endpoint management reports against MSRC applicability guidance.
- Check for unsupported Windows versions that cannot receive current updates.
- Validate local user access is limited on high-value systems.
Public sources used
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
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
Privilege behavior lookup
The CVE wording references privilege impact, so privilege escalation and authorization behavior review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2020-0838 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
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.
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:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C1.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.8HighVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
Source materials
- CVE List V5 sourceCVE List V5
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0838CVE reference · x_refsource_MISC
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.