CVE-2026-7156 | Totolink A8000RU 7.1cu.643_b20200521 CGI /cgi-bin/cstecgi.cgi CsteSystem HTTP os command injection

VDB-359755 · SUBMIT #801142 · CVE-2026-7156 TOTOLINK A8000RU 7.1CU.643_B20200521 CGI /CGI-BIN/CSTECGI.CGI CSTESYSTEM HTTP OS COMMAND INJECTION HISTORYDIFFRELATEJSONXMLCTI Summaryinfo A vulnerability marked as critical has been reported in Totolink A8000RU 7.1cu.643_b20200521. Affected by this vulnerability is the function CsteSystem of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. This manipulation of the argument HTTP causes os command injection. This vulnerability is registered as CVE-2026-7156. Remote exploitation of the attack is possible. Furthermore, an exploit is available. Detailsinfo A vulnerability was found in Totolink A8000RU 7.1cu.643_b20200521. It has been declared as critical. Affected by this vulnerability is the function CsteSystem of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. The manipulation of the argument HTTP 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. It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-7156. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details and also a public exploit are known. The attack technique deployed by this issue is T1202 according to MITRE ATT&CK. 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. Productinfo Vendor Totolink Name A8000RU Version 7.1cu.643_b20200521 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 04/26/2026 Advisory disclosed 04/26/2026 +0 days VulDB entry created 04/26/2026 +0 days VulDB entry last update Sourcesinfo Vendor: totolink.net Advisory: github.com Status: Not defined CVE: CVE-2026-7156 (🔒) GCVE (CVE): GCVE-0-2026-7156 GCVE (VulDB): GCVE-100-359755 scip Labs: https://www.scip.ch/en/?labs.20161013 Entryinfo Created: 04/26/2026 22:13 Changes: 04/26/2026 22:13 (57) Complete: 🔍 Submitter: LtzHuster2 Cache ID: 99:280:101 Submitinfo Accepted Submit #801142: Totolink A8000RU 7.1cu.643_b20200521 Command Injection (by LtzHuster2) Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸