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CVE-2017-4941

29
FAUCET Score

CVE-2017-4941 is a stack overflow vulnerability affecting VMware ESXi, Workstation, and Fusion, allowing an authenticated VNC session to trigger remote code execution in a virtual machine via specially crafted VNC packets. It carries a high CVSS score of 8.8, indicating a network-based attack with low complexity and authenticated access leading to high impact on confidentiality, integrity, and availability. While no public exploit code or active exploitation is reported, it has garnered some community discussion and media coverage. Exploitation in ESXi requires VNC to be manually enabled and firewall rules configured to permit VNC traffic.

Impacted Technologies

VendorProductVersion(s)CPE
>= 8.0.0, < 8.5.9CPE matchmatch criteria
cpe:2.3:a:vmware:fusion:*:*:*:*:*:*:*:*
>= 12.0.0, < 12.5.8CPE matchmatch criteria
cpe:2.3:a:vmware:workstation:*:*:*:*:*:*:*:*
5.5CPE matchmatch criteria
cpe:2.3:o:vmware:esxi:5.5:-:*:*:*:*:*:*
5.5CPE matchmatch criteria
cpe:2.3:o:vmware:esxi:5.5:550-20170901001s:*:*:*:*:*:*
5.5CPE matchmatch criteria
cpe:2.3:o:vmware:esxi:5.5:550-20170904001:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.8HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
3.16%
Probability of exploitation in next 30 days
EPSS Percentile
86.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0316 is in the 86th percentile among its peer group of 17,829 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

vmwarepatch availablevia nvd_reference
View patch

References

vmware.com / security/advisories/VMSA-2017-0021.html
Issue TrackingPatchVendor Advisory
securitytracker.com / id/1040024
Third Party AdvisoryVDB Entry
securitytracker.com / id/1040025
Third Party AdvisoryVDB Entry