VMware ESXi (6.5 before ESXi650-201710401-BG), Workstation (12.x before 12.5.8), and Fusion (8.x before 8.5.9) contain a vulnerability that could allow an authenticated VNC session to cause a heap overflow via a specific set of VNC packets resulting in heap corruption
Published Dec 20, 2017
8.8
HIGHCVSS 3.1
EPSS 3.57%
Description
VMware ESXi (6.5 before ESXi650-201710401-BG), Workstation (12.x before 12.5.8), and Fusion (8.x before 8.5.9) contain a vulnerability that could allow an authenticated VNC session to cause a heap overflow via a specific set of VNC packets resulting in heap corruption. Successful exploitation of this issue could result in remote code execution in a virtual machine via the authenticated VNC session. Note: In order for exploitation to be possible in ESXi, VNC must be manually enabled in a virtual machine's .vmx configuration file. In addition, ESXi must be configured to allow VNC traffic through the built-in firewall.
Affected products
-
- Version 6.5 before ESXi650-201710401-BGStatusaffectedConstraints-
- Version
-
- Version 8.x before 8.5.9StatusaffectedConstraints-
- Version
-
- Version 12.x before 12.5.8StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
Configuration 1
- ≥ 12.0.0 · < 12.5.8
- 14.0
- 14.1.0
- 6.5
- 6.5
- 6.5
- 6.5
- 6.5
- 6.5
- 6.5
- 6.5
- 6.5
- 6.5
- 6.5
- 6.5
- 6.5
- 6.5
- 6.5
- 6.5
- 6.5
- 6.5
- 6.5
- 6.5
- 6.5
- 6.5
- 6.5
- 6.5
- 6.5
- 6.5
- 6.5
- 6.5
- 6.5
- 6.5
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
No CVSS v3.0 score for this CVE.
AV:N/AC:M/Au:S/C:P/I:P/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (24 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 3.57% (0.03571) | 88.99th | v5 (v2026.06.15) |
| Jun 15, 2026 | 3.57% (0.03571) | 87.84th | v5 (v2026.06.15) |
| Nov 21, 2025 | 7.08% (0.07078) | 91.13th | v4 (v2025.03.14) |
| Nov 18, 2025 | 6.07% (0.06072) | 89.83th | v4 (v2025.03.14) |
| Mar 30, 2025 | 7.42% (0.07424) | 90.90th | v4 (v2025.03.14) |
| Mar 29, 2025 | 14.03% (0.14027) | 90.59th | v4 (v2025.03.14) |
| Mar 19, 2025 | 7.42% (0.07424) | 90.64th | v4 (v2025.03.14) |
| Mar 17, 2025 | 8.69% (0.08687) | 91.82th | v4 (v2025.03.14) |
| Dec 17, 2024 | 1.91% (0.01911) | 88.26th | v3 (v2023.03.01) |
| Feb 14, 2024 | 15.04% (0.15039) | 95.63th | v3 (v2023.03.01) |
| Nov 30, 2023 | 17.10% (0.17096) | 95.55th | v3 (v2023.03.01) |
| Oct 30, 2023 | 16.76% (0.16756) | 95.45th | v3 (v2023.03.01) |
| Oct 5, 2023 | 18.53% (0.18529) | 95.59th | v3 (v2023.03.01) |
| May 13, 2023 | 22.36% (0.22359) | 95.78th | v3 (v2023.03.01) |
| May 8, 2023 | 23.56% (0.23559) | 95.83th | v3 (v2023.03.01) |
| Mar 7, 2023 | 36.78% (0.36779) | 96.50th | v3 (v2023.03.01) |
| Mar 6, 2023 | 4.70% (0.04695) | 89.17th | v2 (v2022.01.01) |
| Sep 16, 2022 | 4.70% (0.04695) | 88.68th | v2 (v2022.01.01) |
| Apr 1, 2022 | 4.57% (0.04571) | 87.83th | v2 (v2022.01.01) |
| Feb 4, 2022 | 4.57% (0.04571) | 74.15th | v2 (v2022.01.01) |
| Feb 3, 2022 | 1.83% (0.01828) | 35.38th | v1 |
| Jan 6, 2022 | 1.83% (0.01828) | 34.69th | v1 |
| Sep 1, 2021 | 1.83% (0.01828) | 74.99th | v1 |
| Apr 14, 2021 | 1.83% (0.01828) | 0.00th | v1 |
References (3)
- http://www.securitytracker.com/id/1040024 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1040025 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- https://www.vmware.com/security/advisories/VMSA-2017-0021.html x_refsource_CONFIRMIssue TrackingVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| http://www.securitytracker.com/id/1040024 | vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry | |
| http://www.securitytracker.com/id/1040025 | vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry | |
| https://www.vmware.com/security/advisories/VMSA-2017-0021.html | x_refsource_CONFIRMIssue TrackingVendor Advisory |
Change history (0)
No recorded changes yet.