CVE-2026-5103 | Totolink A3300R 17.0.0cu.557_b20221024 /cgi-bin/cstecgi.cgi setUPnPCfg enable command injection

VDB-354128 · CVE-2026-5103 · GCVE-100-354128 TOTOLINK A3300R 17.0.0CU.557_B20221024 /CGI-BIN/CSTECGI.CGI SETUPNPCFG ENABLE COMMAND INJECTION HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 5.7 $0-$5k 1.97+ Summaryinfo A vulnerability described as critical has been identified in Totolink A3300R 17.0.0cu.557_b20221024. Impacted is the function setUPnPCfg of the file /cgi-bin/cstecgi.cgi. Such manipulation of the argument enable leads to command injection. This vulnerability is listed as CVE-2026-5103. The attack may be performed from remote. In addition, an exploit is available. Detailsinfo A vulnerability was found in Totolink A3300R 17.0.0cu.557_b20221024 and classified as critical. Affected by this issue is the function setUPnPCfg of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument enable 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 advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-5103. The exploitation is known to be easy. The attack may be launched remotely. Technical details as well as a public exploit are known. The MITRE ATT&CK project declares the attack technique as T1202. The exploit is available 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 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: 5.7 VulDB Base Score: 6.3 VulDB Temp Score: 5.7 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: 🔒 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 03/29/2026 Advisory disclosed 03/29/2026 +0 days VulDB entry created 03/29/2026 +0 days VulDB entry last update Sourcesinfo Vendor: totolink.net Advisory: github.com Status: Not defined CVE: CVE-2026-5103 (🔒) GCVE (CVE): GCVE-0-2026-5103 GCVE (VulDB): GCVE-100-354128 scip Labs: https://www.scip.ch/en/?labs.20161013 Entryinfo Created: 03/29/2026 19:56 Changes: 03/29/2026 19:56 (56) Complete: 🔍 Submitter: LvHW Cache ID: 99:5F9:101 Submitinfo Accepted Submit #779140: Totolink A3300R 17.0.0cu.557_b20221024 Command Injection (by LvHW) Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸