Security readout for executives and security teams
Plain-English summary
CVE-2026-15476 affects QILING Disk Master 6.0.0.0 on systems where its kernel driver diskbckp.sys is installed. A local, already-authenticated user may abuse improper access controls to gain limited confidentiality, integrity, and availability impact. This is not a remote internet-facing issue, but it matters on shared workstations, servers, or environments where low-privileged users exist.
Executive priority
Address in normal vulnerability remediation cycles, faster for shared systems or administrator workstations. The issue is local-only and medium severity, but public exploit disclosure increases urgency for environments with many local users or weak endpoint controls.
Technical view
The vulnerability is reported in an unknown function of the QILING Disk Master kernel driver diskbckp.sys. VulDB maps it to improper access control weaknesses CWE-266 and CWE-284. CVSS 3.1 is 5.3 with AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L. The report says a public exploit exists and upgrade of the affected component is suggested.
Likely exposure
Exposure is limited to Windows hosts running QILING Disk Master 6.0.0.0 with diskbckp.sys present. Attack requires local access and low privileges. Systems without this product or version are not shown as affected in the provided sources.
Exploitation context
The sources state the exploit has been publicly disclosed and may be used. CISA KEV status is false in the provided bundle, and no cited source confirms active exploitation in the wild. Treat this as a local privilege-abuse risk, especially where untrusted users can log in.
Researcher notes
The public record lacks function-level detail and does not identify a fixed version. One reference is tagged as an exploit and one download as patch, but the bundle does not prove remediation specifics. Avoid assuming broader QILING versions are affected without vendor confirmation.
Mitigation direction
- Inventory endpoints and servers for QILING Disk Master 6.0.0.0.
- Check QILING or iDiskHome guidance for a corrected release.
- Upgrade the affected component if a vendor-fixed build is available.
- Restrict local interactive access to systems running the driver.
- Remove the software where it is not business-required.
Validation and detection
- Confirm whether diskbckp.sys is installed and loaded.
- Verify installed QILING Disk Master version against 6.0.0.0.
- Review vendor release notes before deploying any replacement installer.
- Monitor local privilege changes on affected hosts.
- Track VulDB and CVE records for updated affected-version or fix details.
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-266: 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 lookupCWE-284: Authorization and privilege behavior lookup
Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. 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 lookupCVE-2026-15476 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
- 5.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/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
4 official scoresWe 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:L/I:L/A:L/E:P/RL:O/RC:C1.83.4VulDBCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C1.83.4VulDBCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P——VulDBAV:L/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:OF/RC:C3.16.4VulDBVulnerability scoring details
Base CVSS 4.0 score
4.8MediumVector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
Base CVSS 3.1 score
5.3MediumVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C
Base CVSS 3.0 score
5.3MediumVector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C
Base CVSS 2.0 score
4.3MediumVector: AV:L/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:OF/RC:C
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- Source timelineVulDB
Advisory disclosed
- Source timelineVulDB
VulDB entry created
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- Source timelineVulDB
VulDB entry last update
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
Source materials
- CVE List V5 sourceCVE List V5
- VDB-377781 | QILING Disk Master Kernel Driver diskbckp.sys access controlCVE reference, VulDB · vdb-entry
- VDB-377781 | CTI Indicators (IOB, IOC, TTP, IOA)CVE reference, VulDB · signature, permissions-required
- CVE-2026-15476 | CVE Analysis and ReportCVE reference, VulDB · third-party-advisory
- Submit #835610 | QILING Disk Master Kernel Driver diskbckp.sys 6, 0, 0, 0 Local Privilege EscapationCVE reference, VulDB · third-party-advisory
- https://winslow1984.com/books/cve-collection/page/qiling-disk-master-kernel-driver-diskbckpsys-6-0-0-0-local-privilege-escalationCVE reference, VulDB · exploit
- https://www.idiskhome.com/download/beta/multi_DiskMaster_Pro_Trial.exeCVE reference, VulDB · patch
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.
Incorrect Privilege Assignment
Incorrect Privilege Assignment represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.
Improper Access Control
Improper Access Control represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.