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ThemisNETPanel CVE-2026-6847

CRITICAL
Missing Authentication for Critical Function (CWE-306)
2026-07-13 CERT-PL
Authentication Bypass File Upload RCE PHP Themisnetpanel
9.3
CVSS 4.0 · Vendor: CERT-PL
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Severity by source

Vendor (CERT-PL) PRIMARY
9.3 CRITICAL
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
vuln.today AI
9.8 CRITICAL

Unauthenticated network-reachable file upload yielding server code execution gives AV:N/AC:L/PR:N/UI:N with full C/I/A impact; scope kept Unchanged as impact is within the vulnerable app's context.

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L

Primary rating from Vendor (CERT-PL).

CVSS VectorVendor: CERT-PL

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
X

Lifecycle Timeline

2
Analysis Generated
Jul 13, 2026 - 14:00 vuln.today
CVE Published
Jul 13, 2026 - 13:26 cve.org
CRITICAL 9.3

DescriptionCVE.org

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.

Articles & Coverage 1

News Critical RCE in PHP ThemisNETPanel (4real) - CVE-2026-6847 Jul 14, 2026

AnalysisAI

Remote code execution in ThemisNETPanel (vendor 4real) allows unauthenticated network attackers to fully compromise the underlying server by abusing a file-upload endpoint that lacks any authentication check. An attacker submits a base64-encoded PHP payload, writes it as an arbitrary PHP file, and executes it in the web application's context. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Identify exposed ThemisNETPanel endpoint
Delivery
Send unauthenticated upload request
Exploit
Write base64-decoded PHP web shell
Execution
Request uploaded file URL
Impact
Execute arbitrary code on server
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Vulnerability AssessmentAI

Exploitation No special conditions - remote unauthenticated exploitation against default configurations of ThemisNETPanel: the vulnerable file-upload endpoint requires no authentication (PR:N), no user interaction (UI:N), and low attack complexity (AC:L). … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The signals are internally consistent and point to a genuine high priority. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker scanning exposed ThemisNETPanel instances sends an unauthenticated HTTP request to the upload endpoint carrying a base64-encoded PHP web shell, which the application decodes and saves as an executable .php file. The attacker then requests that file's URL to run arbitrary commands as the web service account, gaining an interactive foothold on the server. …
Remediation Apply the vendor patch released in April 2026 (patch available per vendor advisory; an exact fixed version string was not provided in the available data - confirm the target version directly with 4real or via the CERT-PL advisory at https://cert.pl/posts/2026/07/CVE-2026-6847/). … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours, identify all ThemisNETPanel instances and restrict network access through firewall rules and IP whitelisting to authorized users only. …

Sign in for detailed remediation steps and compensating controls.

Threat intelligence, references, and detailed analysis are available after sign-in.

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CVE-2026-6847 vulnerability details – vuln.today
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