Security readout for executives and security teams
Plain-English summary
This is a Windows privilege escalation flaw in the Common Log File System driver. An attacker who already has low-level local access could potentially gain high privileges. It is high priority because CISA lists CVE-2022-24521 in the Known Exploited Vulnerabilities catalog.
Executive priority
Treat this as a high-priority patching item, especially where Windows systems support critical operations or broad user access. KEV listing raises urgency because observed exploitation changes the risk from theoretical to operational.
Technical view
CVE-2022-24521 is a Microsoft Windows CLFS driver elevation-of-privilege vulnerability with CVSS 3.1 score 7.8. The vector is local, low complexity, low privileges required, no user interaction, with high confidentiality, integrity, and availability impact. The source bundle maps it to CWE-787.
Likely exposure
Exposure is likely on unpatched Windows endpoints and servers listed by Microsoft, including Windows 7, 8.1, multiple Windows 10 releases, Windows 11 21H2, Windows Server 2008, 2016, 2019, 2022, and Server Core variants.
Exploitation context
CISA KEV status supports that exploitation has been observed. The vulnerability is not remotely exploitable by itself based on the CVSS vector; an attacker needs local low-privileged access first, making it relevant after phishing, malware execution, or compromised user credentials.
Researcher notes
The provided evidence confirms affected Microsoft Windows products, local attack vector, high impact, CWE-787, official remediation availability, and KEV status. The bundle does not include root-cause detail, exploit chain specifics, detection logic, or named threat actor attribution.
Mitigation direction
- Apply Microsoft security updates or vendor guidance for CVE-2022-24521.
- Prioritize internet-managed endpoints, shared workstations, and Windows servers with user logon exposure.
- Identify unsupported Windows versions and plan ESU, isolation, or replacement.
- Monitor CISA KEV requirements where they apply to your organization.
Validation and detection
- Inventory Windows versions against Microsoft’s affected product list.
- Confirm April 2022 or later applicable Microsoft fixes are installed.
- Review vulnerability scanner results for CVE-2022-24521 on endpoints and servers.
- Check EDR telemetry for suspicious local privilege escalation activity.
- Document exceptions for unsupported systems and compensating controls.
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-787: 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 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-2022-24521 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:F/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
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:F/RL:O/RC:C1.85.9Primary CVE scoreVulnerability 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:F/RL:O/RC:C
Source materials
- CVE List V5 sourceCVE List V5
- Windows Common Log File System Driver Elevation of Privilege VulnerabilityCVE reference · vendor-advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-24521CVE reference · 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.
Out-of-bounds Write
Out-of-bounds Write represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.