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Totolink A8000RU CVE-2026-7124

| EUVD-2026-25841 HIGH
OS Command Injection (CWE-78)
2026-04-27 VulDB
Command Injection
8.9
CVSS 4.0
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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

8
Re-analysis Queued
Apr 27, 2026 - 18:37 vuln.today
cvss_changed
PoC Detected
Apr 27, 2026 - 18:36 vuln.today
Public exploit code
Analysis Generated
Apr 27, 2026 - 13:30 vuln.today
Severity Changed
Apr 27, 2026 - 13:22 NVD
CRITICAL HIGH
CVSS changed
Apr 27, 2026 - 13:22 NVD
9.8 (CRITICAL) 8.9 (HIGH)
EUVD ID Assigned
Apr 27, 2026 - 13:00 euvd
EUVD-2026-25841
Analysis Generated
Apr 27, 2026 - 13:00 vuln.today
CVE Published
Apr 27, 2026 - 12:30 nvd
HIGH 8.9

DescriptionNVD

A vulnerability was determined in Totolink A8000RU 7.1cu.643_b20200521. Affected by this vulnerability is the function setIpv6LanCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Executing a manipulation of the argument addrPrefixLen can lead to os command injection. The attack can be launched remotely. The exploit has been publicly disclosed and may be utilized.

AnalysisAI

OS command injection in Totolink A8000RU 7.1cu.643_b20200521 allows remote unauthenticated attackers to execute arbitrary system commands via crafted addrPrefixLen parameter to the setIpv6LanCfg function in /cgi-bin/cstecgi.cgi. CVSS 8.9 (High) with CVSS:4.0 vector indicating network-accessible, low-complexity attack requiring no privileges or user interaction. …

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RemediationAI

Within 24 hours: Identify and isolate all Totolik A8000RU devices on the network; document firmware versions and network criticality. Within 7 days: Contact Totolink support for available firmware updates; if unavailable, determine business justification for continued operation and implement network segmentation (restrict WAN access to management interface via firewall rules, disable remote management features). …

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CVE-2026-7124 vulnerability details – vuln.today
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