CVE-2026-59310

Broadcom VMware vCenter Path Traversal Vulnerability

Actively exploited (CISA KEV) Critical 9.8 CVSS 3.1

Description

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.

Description as published by the source, in English.

Key facts

Published: 2026-07-30
Last modified: 2026-08-19
Assigned by: security@vmware.com
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Scored by: security@vmware.com
Probability of exploitation: 1.1 % higher than 63 % of all known vulnerabilities
EPSS, next 30 days, model v2026.06.15
Fix available: Not registered in the sources

Actively exploited

CISA added this vulnerability to the Known Exploited Vulnerabilities catalogue on 2026-08-18, with a remediation deadline of 2026-08-21 for US federal agencies.

Required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

Affected products

Vendor	Product	Versions	Status
Vmware	Cloud Foundation	all versions listed	Not affected
Vmware	Telco Cloud Infrastructure	3.0	Not affected
Vmware	Telco Cloud Platform	≥ 3.0, ≤ 5.2	Not affected
Vmware	Vcenter Server	< 8.0	Affected
Vmware	Vcenter Server	8.0	Affected
Vmware	Vcenter Server	≥ 9.0, < 9.0.2.0100	Affected
Vmware	Vcenter Server	≥ 9.1, < 9.1.0.0300	Affected
Vmware	Vsphere Foundation	all versions listed	Not affected

Weakness type

CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special ele…

References

https://support.broadcom.com/web/ecx/support-content-notification/-/external/content/Secu… Vendor Advisory
https://medium.com/@quirso_de/active-exploitation-of-cve-2026-59310-361-victim-ips-across… Third Party Advisory
https://medium.com/@quirso_de/global-exploitation-of-cve-2026-59310-by-suspected-chinese-… Third Party Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-59310 US Government Resource

Related at Berigo

Articles

Broadcom fixes authentication bypass and code execution in VMware vCenter Mentions this CVE 2026-07-30
Broadcom published advisory VMSA-2026-0006 on 29 July 2026, fixing five vulnerabilities in VMware vCenter, ESX, Workstation and Fusion. Two of them s…
A new backdoor does nothing at all until one crafted packet arrives Same product 2026-08-25
A new Windows backdoor poses as Microsoft's dpapi.dll and is built to be side-loaded into ESET's ERAAgent.exe. It contacts no fixed server, reading a…
Only one of the 91 vulnerabilities Spring patched is rated critical Same product 2026-08-25
Spring has patched 91 vulnerabilities spread across a range of subprojects, and the advisories on spring.io are dated 20 August. Spring rates one of …
Hardcoded credentials in Dell RecoverPoint exploited since 2024 Same product 2026-02-17
Google and Mandiant link UNC6201 to exploitation of CVE-2026-22769 in Dell RecoverPoint for Virtual Machines, used for backdoors and long-term access.

Does this affect you?

A vulnerability matters only if you run the product, in an affected version, somewhere an attacker can reach.

Check your asset list Browse all vulnerabilities

Sources and freshness

CVE

What it is: A reference number naming one specific vulnerability, for example CVE-2024-9474.
What it tells you: Which vulnerability we are talking about, and in which product.
What it does NOT tell you: Nothing about how serious it is, whether anyone is exploiting it, or whether it concerns you.
Why it matters: Without a shared number, vendor, authority and tooling cannot discuss the same flaw.
Used with the others: The number is the key. NVD, KEV and EPSS all describe the same CVE.

NVD CWE CISA KEV EPSS

How to read this together

No single value should be used on its own. A high CVSS score does not mean a vulnerability is being exploited, and a low one does not mean it is harmless. The four sources answer four different questions.

CVE names the specific vulnerability.
NVD adds severity and technical detail about it.
CWE describes the type of mistake behind it.
CISA KEV shows that it is already being exploited.
EPSS estimates how likely exploitation is soon.

The order that decides what is urgent

Do you actually have the product?
Is the version you run affected?
Is it listed in CISA KEV?
Does it have a high EPSS score?
Is the system reachable from the internet or from others?
How important is the system to the business?
Are there compensating controls already in place?

The first two questions are not about the vulnerability at all. They are about you, and they remove most of the list before you start.

A short example

Fix this week

CVSS 6,5 (medium)

In CISA KEV: yes
EPSS: 94 per cent
A firewall facing the internet

Can be scheduled

CVSS 9,8 (critical)

In CISA KEV: no
EPSS: 0,04 per cent
A test server with no internet access

Sorted by CVSS alone, the one on the right comes first. It is the more serious flaw in theory. But the one on the left is being used against real organisations right now, and it sits where an attacker can reach it. That is the one to fix first.

The critical one still has to be fixed. It just does not have to be fixed today.

This product uses the NVD API but is not endorsed or certified by the NVD. CVE and the CVE logo are registered trademarks of The MITRE Corporation; CVE records are used under the CVE Terms of Use. CWE is a trademark of The MITRE Corporation, used per the CWE Terms of Use. KEV data from CISA (CC0). Exploitation probability from EPSS, a FIRST.org project. Open-source package data from OSV and the GitHub Advisory Database (CC-BY 4.0).

Scores and vectors are shown as published by the sources. The ordering of results is Berigo's own editorial assessment, described on the search page, and is not NVD data. An empty result never means a system is safe.