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A8000Ru CVE-2026-7140

| EUVDEUVD-2026-25879 HIGH
OS Command Injection (CWE-78)
2026-04-27 VulDB
Command Injection A8000Ru
8.9
CVSS 4.0 · NVD
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Severity by source

NVD PRIMARY
8.9 HIGH
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/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 NVD · only source for this CVE.

CVSS VectorNVD

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/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
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
X

Lifecycle Timeline

5
PoC Detected
Apr 27, 2026 - 18:35 vuln.today
Public exploit code
Severity Changed
Apr 27, 2026 - 17:22 NVD
CRITICAL HIGH
CVSS changed
Apr 27, 2026 - 17:22 NVD
9.8 (CRITICAL) 8.9 (HIGH)
EUVD ID Assigned
Apr 27, 2026 - 17:00 euvd
EUVD-2026-25879
CVE Published
Apr 27, 2026 - 16:30 nvd
HIGH 8.9

DescriptionCVE.org

A vulnerability has been found in Totolink A8000RU 7.1cu.643_b20200521. Impacted is the function CsteSystem of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Such manipulation of the argument HTTP leads to os command injection. The attack may be performed from remote. The exploit has been disclosed to the public and may be used.

Analysis

A vulnerability has been found in Totolink A8000RU 7.1cu.643_b20200521. Impacted is the function CsteSystem of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Such manipulation of the argument HTTP leads to os command injection. The attack may be performed from remote. The exploit has been disclosed to the public and may be used.

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OS command injection in Totolink A8000RU router firmware 7.1cu.643_b20200521 allows remote unauthenticated attackers to

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Remote OS command injection in the Totolink A8000RU router (firmware 7.1cu.643_b20200521) allows unauthenticated attacke
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OS command injection in TOTOLINK A8000RU router firmware 7.1cu.643_b20200521 allows remote unauthenticated attackers to

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OS command injection in the Totolink A8000RU router (firmware 7.1cu.643_b20200521) allows remote unauthenticated attacke
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OS command injection in Totolink A8000RU router firmware 7.1cu.643_b20200521 allows remote unauthenticated attackers to

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Same weakness CWE-78 – OS Command Injection

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Same technique Command Injection

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CVE-2026-7140 vulnerability details – vuln.today
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