CVE-2026-34007 PUBLISHED

RCE Unsanitized `X-Forwarded-For` header passed to `shell_exec()` via broken IP validation fallback in `getClientIP()`

Assigner: qnap
Reserved: 25.03.2026 Published: 15.10.2026 Updated: 15.10.2026

An OS command injection vulnerability has been reported to affect Notes Station 3. If exploited, the vulnerability could allow remote attackers to execute arbitrary commands.

We have already fixed the vulnerability in the following version: Notes Station 3 3.9.11 and later

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
CVSS Score: 6.9

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	Low	Confidentiality	None
Attack Complexity	Low	Integrity	Low	Integrity	None
Attack Requirements	None	Availability	Low	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

Product Status

Vendor	QNAP Systems Inc.
Product	Notes Station 3
Versions	Default: unaffected affected from 3.9.x to 3.9.11 (excl.)

Solutions

We have already fixed the vulnerability in the following version: Notes Station 3 3.9.11 and later

Credits

Runic Labs finder

References

https://www.qnap.com/en/app-release-notes?keyword=Notes%20Station%203&app=NotesStation3&product-line=nas

Problem Types

CWE-78 CWE

Impacts

CAPEC-88