Security readout for executives and security teams
Plain-English summary
CVE-2021-21785 can let a low-privileged local attacker obtain sensitive information from IOBit Advanced SystemCare Ultimate 14.2.0.220. This is not a remote internet-facing issue based on the supplied CVSS vector, but it can matter on shared endpoints or systems where local compromise is already possible.
Executive priority
Treat this as a targeted endpoint hygiene issue, not an emergency internet-scale event. Prioritize discovery and remediation where the product runs on sensitive or multi-user systems, especially if local privilege separation is important.
Technical view
The issue is an information disclosure flaw in IOCTL 0x9c40a148 handling. A specially crafted IRP can trigger sensitive information disclosure. The supplied CVSS vector indicates local access, low attack complexity, low privileges required, no user interaction, changed scope, and high confidentiality impact.
Likely exposure
Exposure appears limited to systems running IOBit Advanced SystemCare Ultimate 14.2.0.220. The bundle does not identify affected CPEs, other versions, specific driver names, or whether server installations are plausible.
Exploitation context
The supplied data does not show CISA KEV listing or active exploitation. Exploitation requires local access and low privileges, so the main risk is post-compromise information disclosure on affected endpoints.
Researcher notes
Evidence is strongest for the affected version, IOCTL class, impact type, and local-privileged exploitation requirements. The provided sources do not establish exploit-in-the-wild activity, public weaponization, a fixed version, or broader version impact.
Mitigation direction
- Inventory endpoints for IOBit Advanced SystemCare Ultimate 14.2.0.220.
- Check Talos and vendor guidance for confirmed patched versions or workarounds.
- Upgrade, remove, or disable the affected product where business need is low.
- Limit local user privileges on systems where the product remains installed.
- Prioritize shared, kiosk, lab, and high-sensitivity endpoints.
Validation and detection
- Confirm whether version 14.2.0.220 is installed on managed endpoints.
- Verify the affected product components are enabled before marking a host exposed.
- Review EDR or endpoint telemetry for unusual local access to the product driver or service.
- Document any vendor-confirmed fixed version before closing remediation tickets.
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
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CWE-782: Exact CWE lookup
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Open ATT&CK lookupCVE-2021-21785 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
- 6.5 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
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:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N24Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
6.5MediumVector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://www.talosintelligence.com/vulnerability_reports/TALOS-2021-1252CVE reference · x_refsource_MISC
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.
Exposed IOCTL with Insufficient Access Control
Exposed IOCTL with Insufficient Access Control represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.