Out-of-bounds read in VMware Horizon 6, Horizon 7, and Horizon Client
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- No fix listed
Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-125 and the CVSS impact.
Summary
VMware Horizon 6 (6.x.x before 6.2.7), Horizon 7 (7.x.x before 7.5.1), and Horizon Client (4.x.x and prior before 4.8.1) contain an out-of-bounds read vulnerability in the Message Framework library. Successfully exploiting this issue may allow a less-privileged user to leak information from a privileged process running on a system where Horizon Connection Server, Horizon Agent or Horizon Client are installed. Note: This issue doesn't apply to Horizon 6, 7 Agents installed on Linux systems or Horizon Clients installed on non-Windows systems.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| VMware | VMware Horizon 6, Horizon 7, and Horizon Client | VMware Horizon 6 (6.x.x before 6.2.7), Horizon 7 (7.x.x before 7.5.1), and Horizon Client (4.x.x and prior before 4.8.1) | — | No fix listed | CNA |
- VMware Horizon 6, Horizon 7, and Horizon Client VendorVMware Affected VMware Horizon 6 (6.x.x before 6.2.7), Horizon 7 (7.x.x before 7.5.1), and Horizon Client (4.x.x and prior before 4.8.1) Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2018-6970
- 2026-10-03 Alias added: GHSA-6j55-6hf8-fxvj
References
More VMware Horizon Client vulnerabilities
- TI-2020-03448 Improper privilege management in VMware Fusion, VMware Remote Console for Mac and Horizon… KEVCVSS 3.1HIGH 7.8
- TI-2020-03472 VMware Fusion (11.x before 11.5.5), VMware Remote Console for Mac (11.x and prior before… CVSS 3.1HIGH 7.8
- TI-2020-03459 Incorrect permission assignment in VMware Horizon Client for Windows CVSS 3.1HIGH 7.8
- TI-2019-03948 Incorrect permission assignment in VMware Horizon Client for Windows CVSS 3.1HIGH 7.8
- TI-2018-05086 VMware Horizon Client for Linux (4.x before 4.8.0 and prior) contains a local privilege… CVSS 3.0HIGH 7.8
- TI-2020-03494 VMware Horizon Client for Windows (5.x prior to 5.5.0) contains an information disclosure… CVSS 3.1MEDIUM 6.5
Sources
- CVE-2018-6970 · CVE Program
- CVE-2018-6970 · NVD
- FIRST EPSS
- GHSA-6j55-6hf8-fxvj · GitHub Advisory Database · CC BY 4.0
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