Out-of-bounds read in VMware vCenter Server
Priority HIGH 66CWE-125Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-125 and the CVSS impact.
Summary
The VMware vCenter Server contains an out-of-bounds read vulnerability in the implementation of the DCERPC protocol. A malicious actor with network access to vCenter Server may trigger an out-of-bounds read by sending a specially crafted packet leading to denial-of-service of certain services (vmcad, vmdird, and vmafdd).
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00901 59th percentileScored 2026-11-07
Fix Fixed VMware vCenter Server (vCenter Server) (VMware): 8.0 U1b, 7.0 u3mVMware Cloud Foundation (vCenter Server) (VMware): 7.0 U3m, 8.0 U1b
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| VMware | VMware vCenter Server (vCenter Server) | 8.0 to before 8.0 U1b; 7.0 to before 7.0 u3m | 8.0 U1b, 7.0 u3m | Patch available | CNA |
| VMware | VMware Cloud Foundation (vCenter Server) | 5.x to before 7.0 U3m, 8.0 U1b; 4.x to before 7.0 U3m, 8.0 U1b | 7.0 U3m, 8.0 U1b | Patch available | CNA |
- VMware vCenter Server (vCenter Server) VendorVMware Affected 8.0 to before 8.0 U1b; 7.0 to before 7.0 u3m Fixed in 8.0 U1b, 7.0 u3m Patch available CNA
- VMware Cloud Foundation (vCenter Server) VendorVMware Affected 5.x to before 7.0 U3m, 8.0 U1b; 4.x to before 7.0 U3m, 8.0 U1b Fixed in 7.0 U3m, 8.0 U1b Patch available CNA
CPE configurations NVD · 33
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:vmware:vcenter_server:*:*:*:*:*:*:*:* | 4.0 to before 7.0 | Vulnerable | VMware |
| cpe:2.3:a:vmware:vcenter_server:7.0:-:*:*:*:*:*:* | 7.0 | Vulnerable | VMware |
| cpe:2.3:a:vmware:vcenter_server:7.0:a:*:*:*:*:*:* | 7.0 a | Vulnerable | VMware |
| cpe:2.3:a:vmware:vcenter_server:7.0:b:*:*:*:*:*:* | 7.0 b | Vulnerable | VMware |
| cpe:2.3:a:vmware:vcenter_server:7.0:c:*:*:*:*:*:* | 7.0 c | Vulnerable | VMware |
| cpe:2.3:a:vmware:vcenter_server:7.0:d:*:*:*:*:*:* | 7.0 d | Vulnerable | VMware |
| cpe:2.3:a:vmware:vcenter_server:7.0:update1:*:*:*:*:*:* | 7.0 update1 | Vulnerable | VMware |
| cpe:2.3:a:vmware:vcenter_server:7.0:update1a:*:*:*:*:*:* | 7.0 update1a | Vulnerable | VMware |
| cpe:2.3:a:vmware:vcenter_server:7.0:update1c:*:*:*:*:*:* | 7.0 update1c | Vulnerable | VMware |
| cpe:2.3:a:vmware:vcenter_server:7.0:update1d:*:*:*:*:*:* | 7.0 update1d | Vulnerable | VMware |
- cpe:2.3:a:vmware:vcenter_server:*:*:*:*:*:*:*:* Versions 4.0 to before 7.0 Vulnerable ·VMware
- cpe:2.3:a:vmware:vcenter_server:7.0:-:*:*:*:*:*:* Versions 7.0 Vulnerable ·VMware
- cpe:2.3:a:vmware:vcenter_server:7.0:a:*:*:*:*:*:* Versions 7.0 a Vulnerable ·VMware
- cpe:2.3:a:vmware:vcenter_server:7.0:b:*:*:*:*:*:* Versions 7.0 b Vulnerable ·VMware
- cpe:2.3:a:vmware:vcenter_server:7.0:c:*:*:*:*:*:* Versions 7.0 c Vulnerable ·VMware
- cpe:2.3:a:vmware:vcenter_server:7.0:d:*:*:*:*:*:* Versions 7.0 d Vulnerable ·VMware
- cpe:2.3:a:vmware:vcenter_server:7.0:update1:*:*:*:*:*:* Versions 7.0 update1 Vulnerable ·VMware
- cpe:2.3:a:vmware:vcenter_server:7.0:update1a:*:*:*:*:*:* Versions 7.0 update1a Vulnerable ·VMware
- cpe:2.3:a:vmware:vcenter_server:7.0:update1c:*:*:*:*:*:* Versions 7.0 update1c Vulnerable ·VMware
- cpe:2.3:a:vmware:vcenter_server:7.0:update1d:*:*:*:*:*:* Versions 7.0 update1d Vulnerable ·VMware
Show 23 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:vmware:vcenter_server:7.0:update2:*:*:*:*:*:* | 7.0 update2 | Vulnerable | VMware |
| cpe:2.3:a:vmware:vcenter_server:7.0:update2a:*:*:*:*:*:* | 7.0 update2a | Vulnerable | VMware |
| cpe:2.3:a:vmware:vcenter_server:7.0:update2b:*:*:*:*:*:* | 7.0 update2b | Vulnerable | VMware |
| cpe:2.3:a:vmware:vcenter_server:7.0:update2c:*:*:*:*:*:* | 7.0 update2c | Vulnerable | VMware |
| cpe:2.3:a:vmware:vcenter_server:7.0:update2d:*:*:*:*:*:* | 7.0 update2d | Vulnerable | VMware |
| cpe:2.3:a:vmware:vcenter_server:7.0:update3:*:*:*:*:*:* | 7.0 update3 | Vulnerable | VMware |
| cpe:2.3:a:vmware:vcenter_server:7.0:update3a:*:*:*:*:*:* | 7.0 update3a | Vulnerable | VMware |
| cpe:2.3:a:vmware:vcenter_server:7.0:update3c:*:*:*:*:*:* | 7.0 update3c | Vulnerable | VMware |
| cpe:2.3:a:vmware:vcenter_server:7.0:update3d:*:*:*:*:*:* | 7.0 update3d | Vulnerable | VMware |
| cpe:2.3:a:vmware:vcenter_server:7.0:update3e:*:*:*:*:*:* | 7.0 update3e | Vulnerable | VMware |
| cpe:2.3:a:vmware:vcenter_server:7.0:update3f:*:*:*:*:*:* | 7.0 update3f | Vulnerable | VMware |
| cpe:2.3:a:vmware:vcenter_server:7.0:update3g:*:*:*:*:*:* | 7.0 update3g | Vulnerable | VMware |
| cpe:2.3:a:vmware:vcenter_server:7.0:update3h:*:*:*:*:*:* | 7.0 update3h | Vulnerable | VMware |
| cpe:2.3:a:vmware:vcenter_server:7.0:update3i:*:*:*:*:*:* | 7.0 update3i | Vulnerable | VMware |
| cpe:2.3:a:vmware:vcenter_server:7.0:update3j:*:*:*:*:*:* | 7.0 update3j | Vulnerable | VMware |
| cpe:2.3:a:vmware:vcenter_server:7.0:update3k:*:*:*:*:*:* | 7.0 update3k | Vulnerable | VMware |
| cpe:2.3:a:vmware:vcenter_server:7.0:update3l:*:*:*:*:*:* | 7.0 update3l | Vulnerable | VMware |
| cpe:2.3:a:vmware:vcenter_server:8.0:-:*:*:*:*:*:* | 8.0 | Vulnerable | VMware |
| cpe:2.3:a:vmware:vcenter_server:8.0:a:*:*:*:*:*:* | 8.0 a | Vulnerable | VMware |
| cpe:2.3:a:vmware:vcenter_server:8.0:b:*:*:*:*:*:* | 8.0 b | Vulnerable | VMware |
| cpe:2.3:a:vmware:vcenter_server:8.0:c:*:*:*:*:*:* | 8.0 c | Vulnerable | VMware |
| cpe:2.3:a:vmware:vcenter_server:8.0:update1:*:*:*:*:*:* | 8.0 update1 | Vulnerable | VMware |
| cpe:2.3:a:vmware:vcenter_server:8.0:update1a:*:*:*:*:*:* | 8.0 update1a | Vulnerable | VMware |
- cpe:2.3:a:vmware:vcenter_server:7.0:update2:*:*:*:*:*:* Versions 7.0 update2 Vulnerable ·VMware
- cpe:2.3:a:vmware:vcenter_server:7.0:update2a:*:*:*:*:*:* Versions 7.0 update2a Vulnerable ·VMware
- cpe:2.3:a:vmware:vcenter_server:7.0:update2b:*:*:*:*:*:* Versions 7.0 update2b Vulnerable ·VMware
- cpe:2.3:a:vmware:vcenter_server:7.0:update2c:*:*:*:*:*:* Versions 7.0 update2c Vulnerable ·VMware
- cpe:2.3:a:vmware:vcenter_server:7.0:update2d:*:*:*:*:*:* Versions 7.0 update2d Vulnerable ·VMware
- cpe:2.3:a:vmware:vcenter_server:7.0:update3:*:*:*:*:*:* Versions 7.0 update3 Vulnerable ·VMware
- cpe:2.3:a:vmware:vcenter_server:7.0:update3a:*:*:*:*:*:* Versions 7.0 update3a Vulnerable ·VMware
- cpe:2.3:a:vmware:vcenter_server:7.0:update3c:*:*:*:*:*:* Versions 7.0 update3c Vulnerable ·VMware
- cpe:2.3:a:vmware:vcenter_server:7.0:update3d:*:*:*:*:*:* Versions 7.0 update3d Vulnerable ·VMware
- cpe:2.3:a:vmware:vcenter_server:7.0:update3e:*:*:*:*:*:* Versions 7.0 update3e Vulnerable ·VMware
- cpe:2.3:a:vmware:vcenter_server:7.0:update3f:*:*:*:*:*:* Versions 7.0 update3f Vulnerable ·VMware
- cpe:2.3:a:vmware:vcenter_server:7.0:update3g:*:*:*:*:*:* Versions 7.0 update3g Vulnerable ·VMware
- cpe:2.3:a:vmware:vcenter_server:7.0:update3h:*:*:*:*:*:* Versions 7.0 update3h Vulnerable ·VMware
- cpe:2.3:a:vmware:vcenter_server:7.0:update3i:*:*:*:*:*:* Versions 7.0 update3i Vulnerable ·VMware
- cpe:2.3:a:vmware:vcenter_server:7.0:update3j:*:*:*:*:*:* Versions 7.0 update3j Vulnerable ·VMware
- cpe:2.3:a:vmware:vcenter_server:7.0:update3k:*:*:*:*:*:* Versions 7.0 update3k Vulnerable ·VMware
- cpe:2.3:a:vmware:vcenter_server:7.0:update3l:*:*:*:*:*:* Versions 7.0 update3l Vulnerable ·VMware
- cpe:2.3:a:vmware:vcenter_server:8.0:-:*:*:*:*:*:* Versions 8.0 Vulnerable ·VMware
- cpe:2.3:a:vmware:vcenter_server:8.0:a:*:*:*:*:*:* Versions 8.0 a Vulnerable ·VMware
- cpe:2.3:a:vmware:vcenter_server:8.0:b:*:*:*:*:*:* Versions 8.0 b Vulnerable ·VMware
- cpe:2.3:a:vmware:vcenter_server:8.0:c:*:*:*:*:*:* Versions 8.0 c Vulnerable ·VMware
- cpe:2.3:a:vmware:vcenter_server:8.0:update1:*:*:*:*:*:* Versions 8.0 update1 Vulnerable ·VMware
- cpe:2.3:a:vmware:vcenter_server:8.0:update1a:*:*:*:*:*:* Versions 8.0 update1a Vulnerable ·VMware
Remediation
- Fix · CNA VMware vCenter Server (vCenter Server) (VMware) Fixed in 8.0 U1b, 7.0 u3m
- Fix · CNA VMware Cloud Foundation (vCenter Server) (VMware) Fixed in 7.0 U3m, 8.0 U1b
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Release ·
VMware Cloud Foundation (vCenter Server), VMware vCenter Server (vCenter Server) 7.0 U3m, 8.0 U1b, 7.0 u3m, 8.0 U1b
5 records Highest priority Priority HIGH 5 HIGH
Other records, highest priority first
- TI-2023-07311 Out-of-bounds write in VMware vCenter ServerPriority HIGH 76
- TI-2023-07310 Out-of-bounds write in VMware vCenter ServerPriority HIGH 76
- TI-2023-07309 Use after free in VMware vCenter ServerPriority HIGH 76
Timeline
- 2026-10-02 Threatist record created from CVE-2023-20896
- 2026-10-03 Alias added: GHSA-fm8c-6m3x-v3rf
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-2023-20896 · CVE Program
- CVE-2023-20896 · NVD
- FIRST EPSS
- GHSA-fm8c-6m3x-v3rf · GitHub Advisory Database · CC BY 4.0
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