Which versions of Totolink A7100RU are affected by CVE-2026-5854?

Totolik A7100RU routers (version 7.4cu.2313_b20191024 and potentially earlier) contain a critical unauthenticated remote command injection vulnerability that allows attackers to execute arbitrary…

Is there a public PoC exploit available for CVE-2026-5854?

Yes, a public proof-of-concept exploit is available for CVE-2026-5854. Prioritise patching immediately. EPSS: 0.2%.

Totolink A7100RU CVE-2026-5854

Q: What is the CVSS score of CVE-2026-5854?

CVE-2026-5854 has a CVSS 4.0 base score of 8.9 (High). CVSS vector: 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. EPSS exploitation probability: 0.2%.

EUVD-2026-20870 HIGH

OS Command Injection (CWE-78)

2026-04-09 VulDB

Command Injection

8.9

CVSS 4.0

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

Lifecycle Timeline

Re-analysis Queued

Apr 27, 2026 - 19:07 vuln.today

cvss_changed

PoC Detected

Apr 09, 2026 - 07:16 vuln.today

Public exploit code

EUVD ID Assigned

Apr 09, 2026 - 07:00 euvd

EUVD-2026-20870

Analysis Generated

Apr 09, 2026 - 07:00 vuln.today

CVE Published

Apr 09, 2026 - 06:45 nvd

HIGH 8.9

DescriptionNVD

A vulnerability was detected in Totolink A7100RU 7.4cu.2313_b20191024. Affected by this issue is the function setWiFiEasyCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Performing a manipulation of the argument merge results in os command injection. It is possible to initiate the attack remotely. The exploit is now public and may be used.

AnalysisAI

OS command injection in Totolink A7100RU router 7.4cu.2313_b20191024 allows unauthenticated remote attackers to execute arbitrary system commands via the 'merge' parameter in setWiFiEasyCfg function within /cgi-bin/cstecgi.cgi. CVSS 9.8 critical severity. …

RemediationAI

Within 24 hours: Identify all Totolik A7100RU routers in production using network scanning or device inventory tools and isolate affected devices to an out-of-band management network if possible. Within 7 days: Contact Totolik support for firmware availability beyond version 7.4cu.2313_b20191024; if no patch is released, implement network-level mitigation (see compensating_controls). …

Analysis

Detailed AI-generated intelligence summary covering attack vector, impact assessment, affected versions, remediation steps, and indicators of compromise.

POChttps://••••••••••.com/exploit

PATCHhttps://••••••••••.com/patch

ADVISORYhttps://••••••••••.com/advisory

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CVE-2026-5854 vulnerability details – vuln.today

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Totolink A7100RU CVE-2026-5854

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DescriptionNVD

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Totolink A7100RU CVE-2026-5854

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External POC / Exploit Code