Security readout for executives and security teams
Plain-English summary
CVE-2019-0948 lets a malicious XML file imported into Windows Event Viewer cause arbitrary local file disclosure. It requires user interaction: an authenticated user must be convinced to import the crafted file. The impact is confidentiality loss, not system takeover.
Executive priority
Prioritize through normal patch governance, with higher urgency for legacy Windows systems, administrator workstations, and teams that routinely handle diagnostic event logs. This is not evidenced as actively exploited in the supplied sources, but it can expose sensitive local files.
Technical view
Windows Event Viewer eventvwr.msc improperly parses XML containing an external entity reference. Successful exploitation can read arbitrary files through an XXE declaration. The CVSS 3.1 score is 4.7, with local attack vector, high complexity, required user interaction, and confidentiality impact only.
Likely exposure
Exposure is limited to listed affected Windows client and server versions, including Windows 7, 8.1, 10 versions 1709-1903, Server 2008, Server 2008 R2, Server 2019, and Server Core variants. Systems without the Microsoft update remain the concern.
Exploitation context
The supplied bundle does not show CISA KEV listing or active exploitation evidence. Exploitation requires persuading an authenticated user to import a specially crafted XML file into Event Viewer, which reduces broad remote exploitation likelihood but leaves phishing or helpdesk-style scenarios relevant.
Researcher notes
Treat this as an XXE-based local information disclosure in Event Viewer XML import handling. The patch changes XML parsing behavior. The bundle does not provide CWE mapping, proof-of-concept details, or exploit-in-the-wild evidence, so avoid stronger claims without additional sourced evidence.
Mitigation direction
- Apply the Microsoft security update for CVE-2019-0948.
- Check current MSRC guidance for supported-version update availability.
- Avoid importing Event Viewer XML files from untrusted sources.
- Retire or isolate unsupported affected Windows versions where updates are unavailable.
Validation and detection
- Inventory endpoints and servers against the affected Windows versions listed by Microsoft.
- Confirm the relevant Microsoft update is installed on in-scope systems.
- Review operational workflows that import Event Viewer XML files.
- Check security awareness controls for handling unsolicited diagnostic or log files.
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-2019-0948 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
- 4.7 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N/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:N/UI:R/S:U/C:H/I:N/A:N/E:P/RL:O/RC:C13.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
4.7MediumVector: CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N/E:P/RL:O/RC:C
Source materials
- CVE List V5 sourceCVE List V5
- Windows Event Viewer Information Disclosure VulnerabilityCVE reference · vendor-advisory
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-0948CVE reference · x_refsource_MISC, x_transferred
- https://www.zerodayinitiative.com/advisories/ZDI-19-641/CVE 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.