Security readout for executives and security teams
Plain-English summary
CVE-2019-0986 lets a signed-in local attacker abuse Windows User Profile Service symlink handling to delete files or folders with elevated privileges. It is not a remote break-in, but it can damage system integrity or availability on affected Windows endpoints and servers.
Executive priority
Treat as a normal-priority Windows patching issue, with higher urgency for shared or multi-user systems. The business risk is local privilege misuse causing deletion of important files, not unauthenticated remote compromise.
Technical view
Microsoft describes an elevation-of-privilege flaw in ProfSvc symlink handling. Exploitation requires local logon, low privileges, no user interaction, and high attack complexity. Successful exploitation allows elevated-context deletion of attacker-chosen files or folders. Microsoft says the security update corrects ProfSvc symlink handling.
Likely exposure
Exposure is limited to listed affected Windows versions, including Windows 7/8.1, multiple Windows 10 releases, Windows Server 2016, Windows Server 2019, and Server Core variants. Systems already patched with the relevant Microsoft security update should not remain exposed.
Exploitation context
The source bundle does not show CISA KEV listing or active exploitation evidence. The CVSS vector indicates local attack, low privileges, high complexity, and proof-of-concept exploit maturity, but this should not be treated as confirmed active exploitation.
Researcher notes
Key constraints are local authenticated access and high complexity. Impact is elevated-context deletion, not confidentiality loss or remote code execution in the provided sources. Do not claim active exploitation without additional cited evidence.
Mitigation direction
- Apply the Microsoft security update for CVE-2019-0986 on affected Windows systems.
- Prioritize shared workstations, terminal servers, and systems where untrusted users can log on.
- Confirm unsupported Windows versions are isolated, upgraded, or covered by vendor guidance.
- Review Microsoft guidance for exact update applicability by OS version.
Validation and detection
- Inventory hosts running the affected Windows versions listed in the source bundle.
- Verify the relevant Microsoft security update is installed on each affected host.
- Check vulnerability management results against MSRC CVE-2019-0986 applicability data.
- Review local user access on systems where patching is delayed.
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-2019-0986 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
- 6.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/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:H/PR:L/UI:N/S:U/C:N/I:H/A:H/E:P/RL:O/RC:C15.2Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.3MediumVector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H/E:P/RL:O/RC:C
Source materials
- CVE List V5 sourceCVE List V5
- Windows User Profile Service Elevation of Privilege VulnerabilityCVE reference · vendor-advisory
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0986CVE 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.