Security readout for executives and security teams
Plain-English summary
CVE-2019-1027 is a Windows Audio Service privilege-escalation flaw. A user who can run a specially crafted local application could gain elevated privileges and run code with higher rights. It does not provide remote code execution by itself, but it can increase the impact of another compromise on affected Windows systems.
Executive priority
Treat as high-priority patch hygiene, not an emergency internet-exposed issue. The business risk is post-compromise privilege escalation that can help attackers deepen control after gaining local execution.
Technical view
MSRC describes an elevation-of-privilege issue in Windows Audio Service request handling. Exploitation requires local execution with low privileges and no user interaction, with CVSS 3.1 score 7.8. Microsoft’s update corrects how the service handles these requests. The bundle lists Windows 10 1709/1803/1809/1903 and Windows Server 1803/1903/2019 variants.
Likely exposure
Exposure is likely where affected Windows 10 or Windows Server builds remain unpatched, especially endpoints allowing local user code execution. Internet exposure is not the main driver because the vulnerability is local.
Exploitation context
The source bundle does not show CISA KEV listing or cited active exploitation. MSRC states exploitation requires a specially crafted application and may be chained with remote code execution or other privilege-escalation flaws.
Researcher notes
Key constraints are local attack vector, low required privileges, no user interaction, and high confidentiality, integrity, and availability impact. The sources provide no CWE mapping and no exploit procedure details; avoid assuming exploit maturity beyond the CVSS exploit-code maturity value provided.
Mitigation direction
- Apply the Microsoft security update for CVE-2019-1027 through approved patch management.
- Prioritize affected Windows endpoints and Server Core installations listed by MSRC.
- Check MSRC guidance for supersedence, package applicability, and any later servicing notes.
- Limit untrusted local application execution while patch rollout is pending.
Validation and detection
- Inventory hosts for the affected Windows versions named in the MSRC/CVE data.
- Confirm the relevant Microsoft update is installed on each affected host.
- Review vulnerability scanner findings against MSRC applicability data before closing tickets.
- Verify no unsupported or unpatched Windows builds remain in production.
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-2019-1027 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
- Windows Audio Service Elevation of Privilege VulnerabilityCVE reference · vendor-advisory
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1027CVE 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.