Out-of-bounds write in VMware vCenter Server Appliance
Priority LOW 34CWE-787Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.
Summary
VMware vCenter Server Appliance (vCSA) (6.5 before 6.5 U1d) contains a local privilege escalation vulnerability via the 'showlog' plugin. Successful exploitation of this issue could result in a low privileged user gaining root level privileges over the appliance base OS.
Why it matters now
EPSS 0.00355 29th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
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 | vCenter Server Appliance (vCSA) | 6.5 before 6.5 U1d | — | No fix listed | CNA |
- vCenter Server Appliance (vCSA) VendorVMware Affected 6.5 before 6.5 U1d Fixed in — No fix listed CNA
CPE configurations NVD · 9
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:vmware:vcenter_server:6.5:a:*:*:*:*:*:* | 6.5 a | Vulnerable | VMware |
| cpe:2.3:a:vmware:vcenter_server:6.5:b:*:*:*:*:*:* | 6.5 b | Vulnerable | VMware |
| cpe:2.3:a:vmware:vcenter_server:6.5:c:*:*:*:*:*:* | 6.5 c | Vulnerable | VMware |
| cpe:2.3:a:vmware:vcenter_server:6.5:d:*:*:*:*:*:* | 6.5 d | Vulnerable | VMware |
| cpe:2.3:a:vmware:vcenter_server:6.5:e:*:*:*:*:*:* | 6.5 e | Vulnerable | VMware |
| cpe:2.3:a:vmware:vcenter_server:6.5:f:*:*:*:*:*:* | 6.5 f | Vulnerable | VMware |
| cpe:2.3:a:vmware:vcenter_server:6.5:update1:*:*:*:*:*:* | 6.5 update1 | Vulnerable | VMware |
| cpe:2.3:a:vmware:vcenter_server:6.5:update1b:*:*:*:*:*:* | 6.5 update1b | Vulnerable | VMware |
| cpe:2.3:a:vmware:vcenter_server:6.5:update1c:*:*:*:*:*:* | 6.5 update1c | Vulnerable | VMware |
- cpe:2.3:a:vmware:vcenter_server:6.5:a:*:*:*:*:*:* Versions 6.5 a Vulnerable ·VMware
- cpe:2.3:a:vmware:vcenter_server:6.5:b:*:*:*:*:*:* Versions 6.5 b Vulnerable ·VMware
- cpe:2.3:a:vmware:vcenter_server:6.5:c:*:*:*:*:*:* Versions 6.5 c Vulnerable ·VMware
- cpe:2.3:a:vmware:vcenter_server:6.5:d:*:*:*:*:*:* Versions 6.5 d Vulnerable ·VMware
- cpe:2.3:a:vmware:vcenter_server:6.5:e:*:*:*:*:*:* Versions 6.5 e Vulnerable ·VMware
- cpe:2.3:a:vmware:vcenter_server:6.5:f:*:*:*:*:*:* Versions 6.5 f Vulnerable ·VMware
- cpe:2.3:a:vmware:vcenter_server:6.5:update1:*:*:*:*:*:* Versions 6.5 update1 Vulnerable ·VMware
- cpe:2.3:a:vmware:vcenter_server:6.5:update1b:*:*:*:*:*:* Versions 6.5 update1b Vulnerable ·VMware
- cpe:2.3:a:vmware:vcenter_server:6.5:update1c:*:*:*:*:*:* Versions 6.5 update1c Vulnerable ·VMware
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2017-4943
- 2026-10-03 Alias added: GHSA-4262-ffcv-r365
References
More VMware Vcenter Server vulnerabilities
- TI-2026-42442 vCenter directory-traversal vulnerability KEVCVSS 3.1CRITICAL 9.8
- TI-2024-26040 Privilege escalation in VMware vCenter Server KEVCVSS 3.1CRITICAL 9.8
- TI-2024-26039 Heap-overflow in VMware vCenter Server KEVCVSS 3.1CRITICAL 9.8
- TI-2024-24610 Out-of-bounds write in VMware vCenter Server KEVCVSS 3.1CRITICAL 9.8
- TI-2023-16914 VMware vCenter Server Out-of-Bounds Write Vulnerability KEVCVSS 3.1CRITICAL 9.8
- TI-2021-05049 Path traversal in VMware vCenter Server, VMware Cloud Foundation KEVCVSS 3.1CRITICAL 9.8
Sources
- CVE-2017-4943 · CVE Program
- CVE-2017-4943 · NVD
- FIRST EPSS
- GHSA-4262-ffcv-r365 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences