CVE-2026-6847: Unauthenticated Remote Code Execution in ThemisNETPanel

Severity: critical (CVSS 9.3 v4.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-07-13 · updated 2026-10-24
Weakness: CWE-306

Description

Remote Code Execution vulnerability exists in ThemisNETPanel due to missing authentication for a critical file upload function. The application exposes an endpoint that allows unauthenticated attackers to upload arbitrary PHP files by providing a base64-encoded payload and to execute arbitrary code on the underlying server. This issue has been fixed by a patch released in April 2026.

Affected products

4real ThemisNETPanel: before 04.2026 — fixed in 04.2026

How to fix

Upgrade to a fixed version: 4real ThemisNETPanel 04.2026. Check the vendor advisory for mitigations.

References

https://cert.pl/posts/2026/07/CVE-2026-6847/

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