CVE-2026-5853 | Totolink A7100RU 7.4cu.2313_b20191024 CGI /cgi-bin/cstecgi.cgi setIpv6LanCfg addrPrefixLen os command injection

VDB-356379 · CVE-2026-5853 · GCVE-100-356379 TOTOLINK A7100RU 7.4CU.2313_B20191024 CGI /CGI-BIN/CSTECGI.CGI SETIPV6LANCFG ADDRPREFIXLEN OS COMMAND INJECTION HISTORYDIFFRELATEJSONXMLCTI Summaryinfo A vulnerability identified as critical has been detected in Totolink A7100RU 7.4cu.2313_b20191024. Affected by this issue is the function setIpv6LanCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Performing a manipulation of the argument addrPrefixLen results in os command injection. This vulnerability is cataloged as CVE-2026-5853. It is possible to initiate the attack remotely. Furthermore, there is an exploit available. Detailsinfo A vulnerability was found in Totolink A7100RU 7.4cu.2313_b20191024. It has been classified as critical. This affects the function setIpv6LanCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. The manipulation of the argument addrPrefixLen 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-2026-5853. 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 04/08/2026 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-2026-5853 (🔒) GCVE (CVE): GCVE-0-2026-5853 GCVE (VulDB): GCVE-100-356379 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: 99:CCA:101 Submitinfo Accepted Submit #791274: Totolink A7100RU 7.4cu.2313_b20191024 Command Injection (by LtzHuster2) Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸