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X5000R CVE-2026-91853

| EUVDEUVD-2026-78822 LOW
OS Command Injection (CWE-78)
2026-09-15 VulDB GHSA-q4rv-4ppf-7295
2.1
CVSS 4.0 · Vendor: VulDB

Severity by source

Vendor (VulDB) PRIMARY
2.1 MEDIUM
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/E:P/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

Primary rating from Vendor (VulDB) · only source for this CVE.

CVSS VectorVendor: VulDB

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
X

Lifecycle Timeline

4
Severity Changed
Sep 15, 2026 - 17:22 NVD
MEDIUM LOW
CVSS changed
Sep 15, 2026 - 17:22 NVD
5.3 (MEDIUM) 2.1 (LOW)
Analysis Generated
Sep 15, 2026 - 17:05 vuln.today
CVE Published
Sep 15, 2026 - 16:15 cve.org
MEDIUM 5.3

DescriptionCVE.org

A vulnerability has been found in TOTOLINK X5000R 9.1.0cu.2089_B20211224. The impacted element is the function exportOvpn of the file /cgi-bin/cstecgi.cgi?action=exportOvpn&type=user of the component Export Ovpn Handler. The manipulation of the argument filetype leads to os command injection. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used.

AnalysisAI

OS command injection in the exportOvpn handler of the TOTOLINK X5000R router firmware (9.1.0cu.2089_B20211224 and potentially other versions) allows an authenticated web-UI user to inject shell metacharacters through the 'filetype' argument supplied to /cgi-bin/cstecgi.cgi?action=exportOvpn&type=user, resulting in commands executed with the privileges of the underlying CGI process. The flaw is remotely reachable (CVSS 4.0 AV:N/AC:L/AT:N/PR:L/UI:N) and publicly available exploit code exists, so any X5000R with an exposed or weakly-credentialed management interface should be treated as at risk. …

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CVE-2026-91853 vulnerability details – vuln.today

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