Security readout for executives and security teams
Plain-English summary
CVE-2019-1458 lets a user or malicious program already running on an affected Windows system gain elevated privileges. Successful exploitation could enable complete compromise of confidentiality, integrity, and availability. It is especially urgent because CISA identifies the vulnerability as known exploited.
Executive priority
Prioritize remediation urgently because exploitation is documented and successful use can deliver full system-level impact. Focus first on affected systems permitting local code execution or handling sensitive operations. Request evidence of update coverage and explicit exception plans for systems that cannot be remediated promptly.
Technical view
Win32k improperly handles objects in memory, creating a local elevation-of-privilege vulnerability. Exploitation requires local access and low privileges, but no user interaction; complexity is rated low. The supplied CVSS 3.1 score is 7.8. The sources do not provide a CWE, detailed root cause, or exploit-chain information.
Likely exposure
Exposure exists where the listed Windows or Windows Server versions remain deployed without the applicable Microsoft remediation. This includes several desktop, RT, Server, and Server Core editions. Internet exposure is not required; an attacker must already execute locally with low privileges, potentially through malware or another vulnerability.
Exploitation context
CISA includes CVE-2019-1458 in its Known Exploited Vulnerabilities catalog, supporting evidence of real-world exploitation. The supplied evidence does not describe campaign scope, current exploitation volume, threat actors, or exploit availability. Treat it as a privilege-escalation component that may be used after initial system access.
Researcher notes
The available evidence establishes a Win32k memory-object handling flaw with local, low-complexity privilege escalation. It does not specify the corrupted object type, vulnerable function, patch mechanics, indicators of compromise, or exploitation artifacts. Validation should therefore rely on Microsoft’s advisory and authenticated update inventory rather than speculative behavioral signatures.
Mitigation direction
- Review Microsoft’s CVE advisory and apply the applicable security updates.
- Prioritize affected endpoints and servers where untrusted users or software can execute.
- Replace or isolate affected systems that cannot receive vendor-supported remediation.
- Use least privilege and application controls to reduce opportunities for local code execution.
Validation and detection
- Inventory systems running the specifically listed Windows and Windows Server versions.
- Compare installed update status with Microsoft’s CVE advisory requirements.
- Confirm remediated systems no longer report the applicable update as missing.
- Review endpoint telemetry for suspicious processes gaining elevated privileges unexpectedly.
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-2019-1458 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
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:H1.85.9CISA-ADPVulnerability 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
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-2019-1458 added to CISA KEV
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
- 2022-01-10T00:00:00.000Z: CVE-2019-1458 added to CISA KEV
Source materials
- CVE List V5 sourceCVE List V5
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1458CVE reference, microsoft · x_refsource_MISC
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-1458CVE 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.