CVE-2026-31165 | Totolink A3300R 17.0.0cu.557_B20221024 /cgi-bin/cstecgi.cgi pppoeServiceName command injection

VDB-359171 · CVE-2026-31165 · GCVE-0-2026-31165 TOTOLINK A3300R 17.0.0CU.557_B20221024 /CGI-BIN/CSTECGI.CGI PPPOESERVICENAME COMMAND INJECTION HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 6.1 $0-$5k 2.60+ Summaryinfo A vulnerability, which was classified as critical, has been found in Totolink A3300R 17.0.0cu.557_B20221024. Affected is an unknown function of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument pppoeServiceName leads to command injection. This vulnerability is documented as CVE-2026-31165. The attack can be initiated remotely. There is not any exploit available. Detailsinfo A vulnerability was found in Totolink A3300R 17.0.0cu.557_B20221024. It has been rated as critical. This issue affects an unknown functionality of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument pppoeServiceName with an unknown input leads to a command injection vulnerability. Using CWE to declare the problem leads to CWE-77. The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component. Impacted is confidentiality, integrity, and availability. The summary by CVE is: An issue was discovered in ToToLink A3300R firmware v17.0.0cu.557_B20221024 allowing attackers to execute arbitrary commands via the pppoeServiceName parameter to /cgi-bin/cstecgi.cgi. It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-31165 since 03/09/2026. The exploitation is known to be easy. The attack may be initiated remotely. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 04/23/2026). The attack technique deployed by this issue is T1202 according to MITRE ATT&CK. 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 A3300R Version 17.0.0cu.557_B20221024 License commercial Website Vendor: https://www.totolink.net/ CPE 2.3info 🔒 CPE 2.2info 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 6.3 VulDB Meta Temp Score: 6.1 VulDB Base Score: 6.3 VulDB Temp Score: 6.1 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: Command injection CWE: CWE-77 / CWE-74 / CWE-707 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Yes Availability: 🔒 Status: Not defined 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 03/09/2026 CVE reserved 04/23/2026 +44 days Advisory disclosed 04/23/2026 +0 days VulDB entry created 04/23/2026 +0 days VulDB entry last update Sourcesinfo Vendor: totolink.net Advisory: github.com Status: Not defined CVE: CVE-2026-31165 (🔒) GCVE (CVE): GCVE-0-2026-31165 GCVE (VulDB): GCVE-100-359171 Entryinfo Created: 04/23/2026 19:55 Changes: 04/23/2026 19:55 (54) Complete: 🔍 Cache ID: 99:A66:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸