CVE-2026-6139 | Totolink A7100RU 7.4cu.2313_b20191024 CGI /cgi-bin/cstecgi.cgi UploadOpenVpnCert FileName os command injection

VDB-357003 · CVE-2026-6139 · SUBMIT #357003 TOTOLINK A7100RU 7.4CU.2313_B20191024 CGI /CGI-BIN/CSTECGI.CGI UPLOADOPENVPNCERT FILENAME OS COMMAND INJECTION HISTORYDIFFRELATEJSONXMLCTI Summaryinfo A vulnerability has been found in Totolink A7100RU 7.4cu.2313_b20191024 and classified as critical. This impacts the function UploadOpenVpnCert of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Performing a manipulation of the argument FileName results in os command injection. This vulnerability was named CVE-2026-6139. The attack may be initiated remotely. In addition, an exploit is available. Detailsinfo A vulnerability classified as critical has been found in Totolink A7100RU 7.4cu.2313_b20191024. This affects the function UploadOpenVpnCert of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. The manipulation of the argument FileName with an unknown input leads to a os command injection vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability. It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-6139. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details and a public exploit are known. The attack technique deployed by this issue is T1202 according to MITRE ATT&CK. The exploit is shared for download 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. Productinfo Vendor Totolink Name A7100RU Version 7.4cu.2313_b20191024 License commercial Website Vendor: https://www.totolink.net/ 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 Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock 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: 🔒 Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: no mitigation known Status: 🔍 0-Day Time: 🔒 Timelineinfo 04/12/2026 Advisory disclosed 04/12/2026 +0 days VulDB entry created 04/12/2026 +0 days VulDB entry last update Sourcesinfo Vendor: totolink.net Advisory: github.com Status: Not defined CVE: CVE-2026-6139 (🔒) GCVE (CVE): GCVE-0-2026-6139 GCVE (VulDB): GCVE-100-357003 scip Labs: https://www.scip.ch/en/?labs.20161013 Entryinfo Created: 04/12/2026 09:32 Changes: 04/12/2026 09:32 (57) Complete: 🔍 Submitter: LtzHuster Cache ID: 99:3AB:101 Submitinfo Accepted Submit #792982: Totolink A7100RU 7.4cu.2313_b20191024 Command Injection (by LtzHuster) Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸