No exploitation reportedFix available

CVE-2017-4933

Q: Is CVE-2017-4933 actively exploited?

Active exploitation of CVE-2017-4933 has not been confirmed. Its EPSS score was 3.6% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2017-4933?

CVE-2017-4933 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

No exploitation reported by the sources we read.

Published2017-12-20
Fixed in12.5.8
WeaknessCWE-787

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC

2017-12-2015:29CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2017-4933?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2017-4933?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Vmware workstation pro

Branch	Affected	Fixed in	Source
12.x	≥ 12.0.0, < 12.5.8	12.5.8	NVD
14.0	= 14.0	no fix published	NVD
14.1	= 14.1.0	no fix published	NVD

Vmware esxi

Branch	Affected	Fixed in	Source
6.5	= 6.5	no fix published	NVD

Vmware fusionversion to verify

Branch	Affected	Fixed in	Source
8.x	≥ 8.0.0, < 8.5.9	8.5.9	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Update Vmware workstation pro to 12.5.8

Advisories and patches

www.vmware.comVendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.18.8read 2026-10-23
NVDCVSS 2.06read 2026-10-23
NVDweakness (CWE)CWE-787read 2026-10-23
FIRST EPSSEPSS score3.6 %2026-10-22

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published: 2017-12-20
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2017-4933?

Is CVE-2017-4933 actively exploited?

Active exploitation of CVE-2017-4933 has not been confirmed. Its EPSS score was 3.6% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2017-4933?

CVE-2017-4933 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

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