Security readout for executives and security teams
Plain-English summary
CVE-2019-0711 lets a privileged user inside a Hyper-V guest VM crash the Windows host by sending malicious requests. This is not a remote internet takeover issue, but it can disrupt every workload on that host and should be prioritized where guest administrators are not fully trusted.
Executive priority
Treat as a moderate infrastructure resilience issue. It does not indicate data theft or host compromise from the sources, but a malicious or compromised guest administrator could crash a host and disrupt business services.
Technical view
Microsoft describes an input validation flaw in Hyper-V where a privileged guest OS user can run a crafted application that causes the host machine to crash. Impact is availability only, with high availability loss, changed scope, low attack complexity, and low privileges required inside the guest.
Likely exposure
Exposure is limited to affected Windows and Windows Server systems running Hyper-V hosts, including listed Windows 8.1, Windows 10, Windows Server 2012 R2, 2016, and 2019 variants. Risk is higher on shared, hosted, lab, or delegated-administration VM platforms.
Exploitation context
The source bundle does not identify CISA KEV listing or active exploitation. Exploitation requires an attacker to already have privileged access inside a guest VM, then trigger a host crash. The credible business impact is denial of service across hosted workloads.
Researcher notes
The CVSS vector shows adjacent attack vector, low complexity, low privileges, no user interaction, changed scope, and high availability impact only. The advisory states Microsoft fixed conditions where Hyper-V failed to prevent malicious guest requests; no CWE or exploit details are provided.
Mitigation direction
- Apply the Microsoft security update or superseding cumulative update for affected Hyper-V hosts.
- Prioritize shared Hyper-V hosts where guest administrators are not fully trusted.
- Restrict privileged guest access to trusted administrators where operationally possible.
- Check MSRC guidance for the exact update package for each Windows version.
- Plan host patching to reduce downtime for dependent virtual machines.
Validation and detection
- Inventory Hyper-V hosts and match OS versions against the affected MSRC list.
- Confirm applicable Microsoft security updates are installed on each host.
- Review whether untrusted users hold privileged accounts inside guest VMs.
- Check incident records for unexplained Hyper-V host crashes around guest activity.
- Verify patch status separately for Server Core installations.
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.
CVE-2019-0711 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
- Medium
- CVSS
- 6.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:N/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:A/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:P/RL:O/RC:C2.34Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.8MediumVector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:P/RL:O/RC:C
Source materials
- CVE List V5 sourceCVE List V5
- Windows Hyper-V Denial of Service VulnerabilityCVE reference · vendor-advisory
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0711CVE 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.