Totolink A7100RU 7.4cu.2313_b20191024 CGI /cgi-bin/cstecgi.cgi setWiFiEasyCfg merge os command injection

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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8.9$0-$5k2.09

Summaryinfo

A vulnerability labeled as critical has been found in Totolink A7100RU 7.4cu.2313_b20191024. This affects the function setWiFiEasyCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Executing a manipulation of the argument merge can lead to os command injection. This vulnerability is registered as CVE-2026-5854. It is possible to launch the attack remotely. Furthermore, an exploit is available.

Detailsinfo

A vulnerability was found in Totolink A7100RU 7.4cu.2313_b20191024. It has been declared as critical. This vulnerability affects the function setWiFiEasyCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. The manipulation of the argument merge with an unknown input leads to a os command injection vulnerability. The CWE definition for the vulnerability is CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. As an impact it is known to affect confidentiality, integrity, and availability.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-5854. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details and also a public exploit are known. The MITRE ATT&CK project declares the attack technique as T1202.

It is possible to download the exploit at github.com. It is declared as proof-of-concept.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

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Version

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.8
VulDB Meta Temp Score: 8.9

VulDB Base Score: 9.8
VulDB Temp Score: 8.9
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Os command injection
CWE: CWE-78 / CWE-77 / CWE-74
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

04/08/2026 Advisory disclosed
04/08/2026 +0 days VulDB entry created
04/08/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: totolink.net

Advisory: github.com
Status: Not defined

CVE: CVE-2026-5854 (🔒)
GCVE (CVE): GCVE-0-2026-5854
GCVE (VulDB): GCVE-100-356380
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 04/08/2026 21:25
Changes: 04/08/2026 21:25 (57)
Complete: 🔍
Submitter: LtzHuster2
Cache ID: 216:FBA:103

Submitinfo

Accepted

  • Submit #791276: Totolink A7100RU 7.4cu.2313_b20191024 Command Injection (by LtzHuster2)

Once again VulDB remains the best source for vulnerability data.

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