Security readout for executives and security teams
Plain-English summary
CVE-2019-0943 lets a logged-in attacker on affected Windows systems potentially become Local System. That is the highest local privilege level, enabling full control of the machine. It is not described as remotely exploitable, and the source bundle does not show known active exploitation.
Executive priority
Prioritize remediation in normal vulnerability-management cycles, with acceleration for systems where many users can log in locally. The risk is serious because compromise can become full system control, but the provided sources require prior local access and do not show active exploitation.
Technical view
The flaw is an elevation of privilege in how Windows handles Advanced Local Procedure Call calls. Successful exploitation requires prior local logon and execution of a specially crafted application, after which code may run in the Local System security context. Microsoft says the update corrects ALPC handling.
Likely exposure
Exposure is limited to affected Windows client and server versions listed by Microsoft, including Windows 7, 8.1, Windows 10 versions 1507 through 1903, Windows Server 2016, and Windows Server 2019 variants. Systems allowing local or interactive access by low-trust users are higher priority.
Exploitation context
The bundle states an attacker must first log on locally, then run a crafted application. No KEV listing is present, and the provided sources do not substantiate active exploitation. Treat this as a privilege-escalation risk that could amplify another initial access path.
Researcher notes
Evidence is limited to public CVE and Microsoft advisory details. No CVSS, CWE, exploit maturity, or specific KB mapping is included in the bundle. Avoid assuming broader Windows versions, remote exploitability, or exploitation in the wild without additional cited evidence.
Mitigation direction
- Apply the Microsoft security update for CVE-2019-0943 on affected Windows systems.
- Prioritize shared workstations, terminal servers, and systems with low-trust local users.
- Restrict local logon and application execution where patching is delayed.
- Follow MSRC guidance for superseded updates and platform-specific applicability.
Validation and detection
- Inventory affected Windows versions and builds listed in the Microsoft advisory.
- Confirm CVE-2019-0943 remediation through enterprise patch management records.
- Check whether vulnerable systems allow local access by non-administrative users.
- Review endpoint controls for unauthorized local application execution attempts.
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.
Execution 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 lookupPrivilege 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-2019-0943 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
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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 and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- Windows ALPC Elevation of Privilege VulnerabilityCVE reference · vendor-advisory
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0943CVE reference · x_refsource_MISC, x_transferred
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.