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VulnerabilityCVE-2026-59310Published 2026-07-30

CVE-2026-59310 — VMware Cloud Foundation

criticalCISA KEVRansomwarePublic exploit5 PoC repos

As of 2026-09-12, CVE-2026-59310 is a CRITICAL-severity vulnerability in VMware Cloud Foundation, CVSS v3.1 9.8, EPSS 2.5% (84.6th percentile). It is listed in the CISA Known Exploited Vulnerabilities catalog (added 2026-08-18), with a US federal remediation deadline of 2026-08-21, and CISA links it to known ransomware campaigns. Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2026-59310, most recently “Three Critical VMware Flaws (CVE-2026-59309, CVE-2026-59310, CVE-2026-47876) Allow Auth Bypass, RCE, and VM Escape”.

CVSS v3.1
9.8/10Critical
EPSS
2.5%Higher than 84.6% of scored CVEs
CISA KEV
ListedAdded · due 2026-08-21
Tracked threats
1Campaigns referencing it
Priority
10/10Threadlinqs triage score
Published
Updated 2026-09-12
CVSS v3.1 9.8 (CRITICAL) · EPSS 2.5% (higher than 84.6% of all scored CVEs) · Priority 10/10 · Published 2026-07-30

Last updated:

What is CVE-2026-59310?

VMware vCenter contains a directory traversal vulnerability in the Syslog server. A malicious actor with network access to vCenter may exploit this issue to execute arbitrary code.

The record classifies CVE-2026-59310 under weakness class CWE-22. Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction, and has high impact on confidentiality, integrity, availability. 5 affected-product entries are recorded, across 1 vendor, listed below. The identifier was first published 90 days ago.

Severity and exploitation probability

CVSS v3.1 base score
9.8 — CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (FIRST)
2.5% probability of exploitation in the next 30 days, higher than 84.6% of all scored CVEs
CISA KEV
Listed since 2026-08-18, federal remediation deadline 2026-08-21 — used in known ransomware campaigns
Threadlinqs priority
10/10 — CISA lists it as used in ransomware, which Threadlinqs scores at the maximum
Published
2026-07-30, last modified 2026-09-12

Is CVE-2026-59310 being exploited?

CISA added CVE-2026-59310 to the Known Exploited Vulnerabilities catalog on 2026-08-18, which means the agency holds evidence of exploitation in the wild; US federal civilian agencies had to remediate it by 2026-08-21 under BOD 22-01. CISA flags the vulnerability as one used in known ransomware campaigns. Weaponised exploit code for CVE-2026-59310 is publicly available. 5 public proof-of-concept repositories are tracked for this identifier. It currently carries a trending score of 56 in the Threadlinqs vulnerability feed.

Affected products and versions

  • VMware: Cloud Foundation, vSphere Foundation, vCenter, Telco Cloud Infrastructure, Telco Cloud Platform

How to fix CVE-2026-59310

Because CVE-2026-59310 is KEV-listed, US federal civilian agencies were required to apply the vendor fix, or stop using the product, by 2026-08-21. No vendor patch reference has been recorded for CVE-2026-59310 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

Threat activity tracking CVE-2026-59310

1 tracked threat in the Threadlinqs corpus references CVE-2026-59310, either in the campaign’s CVE list or as an indicator on the campaign record.

Sources

Enriched from CVE.org, FIRST EPSS, CISA KEV, GitHub Security Advisories, public proof-of-concept repositories. Last verified by Threadlinqs on .

Other references