Security readout for executives and security teams
Plain-English summary
This Windows Task Scheduler flaw lets an attacker who already has limited access raise privileges and potentially take full control of the affected computer. It is not a remote entry point by itself, but it can turn an initial compromise into a serious system takeover.
Executive priority
Treat as a high-priority remediation because exploitation is documented and successful use can provide full system privileges. Focus first on exposed, shared, or already-suspect endpoints and servers. This vulnerability requires an initial foothold, but substantially increases the impact of one.
Technical view
CVE-2019-1069 is a local elevation-of-privilege vulnerability caused by improper validation of certain Task Scheduler file operations, associated with CWE-59. Exploitation requires unprivileged code execution, has low complexity and needs no user interaction. Successful exploitation can compromise confidentiality, integrity, and availability. Microsoft corrected the file-operation validation in a security update.
Likely exposure
Exposure applies to the listed Windows 10 releases and Windows Server 2016, 2019, 1803, and 1903 variants that lack the applicable Microsoft security update. These releases are old, so unsupported or poorly inventoried systems present particular concern. The supplied evidence does not identify specific vulnerable KB or build thresholds.
Exploitation context
CISA lists CVE-2019-1069 in its Known Exploited Vulnerabilities catalog, supporting exploitation in the wild. An attacker must first execute code with unprivileged local access, making this primarily a privilege-escalation component in a broader attack rather than a standalone remote compromise path.
Researcher notes
CVSS 3.1 is 7.8: AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H, with proof-of-concept maturity represented in the supplied vector. The bundle identifies multiple Windows 10 and Server variants but provides no exact KB mapping. Validate applicability through Microsoft rather than inferring patch levels from generic version strings.
Mitigation direction
- Apply the applicable Microsoft security update for each affected Windows release.
- Prioritize affected systems where untrusted users or compromised applications can execute code.
- Upgrade unsupported Windows installations to vendor-supported releases where practical.
- Restrict local access and application execution while remediation is pending.
- Consult Microsoft guidance for release-specific update and support requirements.
Validation and detection
- Inventory systems running the affected Windows and Windows Server releases.
- Verify installation of Microsoft's applicable CVE-2019-1069 security update.
- Confirm update status using trusted endpoint or vulnerability-management records.
- Review endpoint telemetry for suspicious Task Scheduler-related privilege escalation activity.
- Rescan remediated systems and investigate any remaining detections.
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.
CWE-59: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupExecution 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-2019-1069 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
- Yes
- 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.
CISA KEV status
SSVC decision data
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:C1.85.9microsoftVulnerability 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
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- Added to KEVCISA-ADP
CISA Known Exploited Vulnerabilities metadata lists this CVE as known exploited.
- ADP timelineCISA-ADP
CVE-2019-1069 added to CISA KEV
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
- 2022-03-15T00:00:00.000Z: CVE-2019-1069 added to CISA KEV
Source materials
- CVE List V5 sourceCVE List V5
- Task Scheduler Elevation of Privilege VulnerabilityCVE reference, microsoft · vendor-advisory
- VU#119704CVE reference, CVE · third-party-advisory, x_refsource_CERT-VN
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1069CVE reference, CVE · x_refsource_MISC, x_transferred
- https://blog.0patch.com/2019/06/another-task-scheduler-0day-another.htmlCVE reference, CVE · x_refsource_MISC, x_transferred
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-1069CVE reference, CISA-ADP · government-resource
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.
Improper Link Resolution Before File Access ('Link Following')
Improper Link Resolution Before File Access ('Link Following') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.