CVE-2025-9708

Kubernetes C# Client: improper certificate validation in custom CA mode may lead to man-in-the-middle attacks

Published Sep 15, 2025 · Kubernetes Kubernetes · evidence confidence high

Grounded briefings

Catalog interpretations for three audiences. Each brief cites ingested metadata and the original advisories below. They are not independent research and they do not invent exploit steps.

Executive

CVE-2025-9708 is a unknown public vulnerability record for Kubernetes Kubernetes. It is not currently listed in the CISA Known Exploited catalog. Check the linked vendor or CERT advisories for patch status. This summary is a catalog interpretation of the ingested metadata and cites the original advisories below.

System administrator

Identify whether Kubernetes Kubernetes is in your estate, then compare installed versions with the affected ranges. Affected version ranges have not been ingested yet. Check the linked vendor or CERT advisories for patch status. Prefer the vendor or distribution advisory linked in Sources before changing production systems. This is a catalog interpretation, not a runbook.

Security analyst

Signals on file: EPSS 0.3%. It is not currently listed in the CISA Known Exploited catalog. Sources contributing to this record: cve_org, epss, kubernetes. Public exploit references, when present, are outbound links only and are not proof of active exploitation. This is a catalog interpretation of stored metadata.

Exploitation and remediation

Exploitation evidence
Not listed as known exploited in CISA KEV. Not in the CISA KEV catalog.
Patch and remediation
No required-action text is stored yet. Use the vendor or CERT links in Sources for patch availability.
Safe detection guidance
Compare installed versions with the affected ranges below and verify the advisory from the original publisher. This site stores metadata and outbound links only; it does not ship exploit code or proof-of-concept payloads.

Technology hubs

Kubernetes

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

Sep 15, 2025 · Kubernetes Security
Detected
Kubernetes C# Client: improper certificate validation in custom CA mode may lead to man-in-the-middle attacks

Sources

CVE.orgVulnerability recordCVE-2025-9708
Official CVE identifier
cve.org
FIRST EPSSExploitation probabilityCVE-2025-9708
30-day exploitation probability 0.3%
first.org
Kubernetes SecurityVendor advisoryCVE-2025-9708
Kubernetes C# Client: improper certificate validation in custom CA mode may lead to man-in-the-middle attacks
github.com