Threat Intelligence / CVE / CVE-2023-20867

CVE-2023-20867 — Vmware Tools

CISA KEV
CVSS v3.1 3.9 (LOW) · EPSS 2.7% (higher than 85.9% of all scored CVEs) · Priority 9/10 · Published 2023-06-13

As of 2025-10-28, CVE-2023-20867 is a LOW-severity vulnerability in Vmware Tools, CVSS v3.1 3.9, EPSS 2.7% (85.9th percentile). It is listed in the CISA Known Exploited Vulnerabilities catalog (added 2023-06-23), with a US federal remediation deadline of 2023-07-14. Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2023-20867, most recently “UNC3886 Zero-Day Rootkit Campaign Targeting Singaporean Telecommunications — ORB Network C2, Fortinet/VMware Exploitation, Covert Infrastructure Persistence”.

Last updated: 2025-10-28

What is CVE-2023-20867?

A fully compromised ESXi host can force VMware Tools to fail to authenticate host-to-guest operations, impacting the confidentiality and integrity of the guest virtual machine.

The record classifies CVE-2023-20867 under weakness classes CWE-287, NVD-CWE-noinfo. Its CVSS v3 base vector states that the flaw requires local access to the host, needs high-privilege credentials, needs no user interaction. 7 affected-product entries are recorded, across 3 vendors, listed below. The identifier was first published 1188 days ago.

Severity and exploitation probability

CVSS v3.1 base score
3.9 — LOW
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N
EPSS (FIRST)
2.7% probability of exploitation in the next 30 days, higher than 85.9% of all scored CVEs
CISA KEV
Listed since 2023-06-23, federal remediation deadline 2023-07-14
Threadlinqs priority
9/10 — CISA KEV-listed, which Threadlinqs floors at 9
Published
2023-06-13, last modified 2025-10-28

Is CVE-2023-20867 being exploited?

CISA added CVE-2023-20867 to the Known Exploited Vulnerabilities catalog on 2023-06-23, which means the agency holds evidence of exploitation in the wild; US federal civilian agencies had to remediate it by 2023-07-14 under BOD 22-01. It currently carries a trending score of 36 in the Threadlinqs vulnerability feed.

Affected products and versions

How to fix CVE-2023-20867

The record marks a vendor fix as available for CVE-2023-20867. Vendor advisory: http://www.openwall.com/lists/oss-security/2023/10/16/11. Because CVE-2023-20867 is KEV-listed, US federal civilian agencies were required to apply the vendor fix, or stop using the product, by 2023-07-14. Apply the vendor fix referenced above to every affected product listed in this record, then confirm the running version against the vendor advisory.

Threat activity tracking CVE-2023-20867

1 tracked threat in the Threadlinqs corpus references CVE-2023-20867, either in the campaign’s CVE list or as an indicator on the campaign record.

Sources

Seeded from NVD and not yet processed by the Threadlinqs enrichment pipeline, so blank CVSS, EPSS or KEV fields above mean NOT MEASURED rather than measured-absent.

Full detection coverage & IOCs for threats exploiting CVE-2023-20867 are available via the Threadlinqs MCP server (Purple tier). View plans →

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