Security readout for executives and security teams
Plain-English summary
This CVE describes a reported crash issue in an old Malwarebytes Premium driver. A local user may be able to trigger a Windows BSOD through malformed driver input. The vendor reportedly could not reproduce the issue, and the sources do not provide a severity score, confirmed fix, or evidence of active exploitation.
Executive priority
Treat this as a targeted hygiene issue, not an emergency, unless the old Malwarebytes build is widely deployed on shared or user-accessible Windows endpoints. The main business risk is endpoint outage from local denial of service.
Technical view
Malwarebytes Premium 3.3.1.2183 includes FARFLT.SYS, which is reported to insufficiently validate input to IOCTL 0x9c40e000. The stated impact is local denial of service via BSOD, with unspecified other impact possible. Source data lacks CVSS, CWE, complete affected CPEs, and a confirmed vendor reproduction.
Likely exposure
Exposure appears limited to Windows systems running Malwarebytes Premium 3.3.1.2183 with FARFLT.SYS present. The provided affected-product metadata is incomplete, so organizations should rely on endpoint inventory rather than CPE matching alone.
Exploitation context
The CVE references a public proof-of-concept repository, but the bundle does not cite KEV listing or active exploitation. The described attack requires local user access. Vendor reproduction was reportedly unsuccessful, which lowers confidence in practical exploitability.
Researcher notes
The record is sparse and contested by the vendor’s reported inability to reproduce. Avoid assuming privilege escalation or remote reachability from the phrase “unspecified other impact.” Validate exposure through installed version and driver presence, then seek vendor confirmation.
Mitigation direction
- Inventory endpoints for Malwarebytes Premium 3.3.1.2183 and FARFLT.SYS.
- Check Malwarebytes guidance or support for affected status and fixed versions.
- Upgrade or remove obsolete Malwarebytes installations where business-appropriate.
- Prioritize systems where untrusted users can log in locally.
- Monitor Windows crash telemetry for FARFLT.SYS-related BSOD events.
Validation and detection
- Confirm installed Malwarebytes versions through endpoint management data.
- Verify whether FARFLT.SYS is present on scoped Windows endpoints.
- Review crash dumps or reliability logs for FARFLT.SYS involvement.
- Check whether vendor advisories acknowledge a fix or affected build.
- Document systems where local untrusted user access is possible.
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.
CVE-2018-5277 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
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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 and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/ZhiyuanWang-Chengdu-Qihoo360/Malwarebytes_POC/tree/master/0x9c40e000CVE 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.