CVE-2026-4976 | Totolink LR350 9.3.5u.6369_B20220309 /cgi-bin/cstecgi.cgi setWiFiGuestCfg ssid buffer overflow

VDB-353863 · CVE-2026-4976 · GCVE-100-353863 TOTOLINK LR350 9.3.5U.6369_B20220309 /CGI-BIN/CSTECGI.CGI SETWIFIGUESTCFG SSID BUFFER OVERFLOW HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 8.0 $0-$5k 1.80+ Summaryinfo A vulnerability classified as critical has been found in Totolink LR350 9.3.5u.6369_B20220309. This issue affects the function setWiFiGuestCfg of the file /cgi-bin/cstecgi.cgi. This manipulation of the argument ssid causes buffer overflow. This vulnerability appears as CVE-2026-4976. The attack may be initiated remotely. In addition, an exploit is available. Detailsinfo A vulnerability classified as critical was found in Totolink LR350 9.3.5u.6369_B20220309. Affected by this vulnerability is the function setWiFiGuestCfg of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument ssid with an unknown input leads to a buffer overflow vulnerability. The CWE definition for the vulnerability is CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. As an impact it is known to affect confidentiality, integrity, and availability. It is possible to read the advisory at lavender-bicycle-a5a.notion.site. This vulnerability is known as CVE-2026-4976. The exploitation appears to be easy. The attack can be launched remotely. Technical details and also a public exploit are known. It is possible to download the exploit at lavender-bicycle-a5a.notion.site. 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 LR350 Version 9.3.5u.6369_B20220309 License commercial Website Vendor: https://www.totolink.net/ CPE 2.3info 🔒 CPE 2.2info 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 8.8 VulDB Meta Temp Score: 8.0 VulDB Base Score: 8.8 VulDB Temp Score: 8.0 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: Buffer overflow CWE: CWE-120 / CWE-119 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 03/27/2026 Advisory disclosed 03/27/2026 +0 days VulDB entry created 03/27/2026 +0 days VulDB entry last update Sourcesinfo Vendor: totolink.net Advisory: lavender-bicycle-a5a.notion.site Status: Not defined CVE: CVE-2026-4976 (🔒) GCVE (CVE): GCVE-0-2026-4976 GCVE (VulDB): GCVE-100-353863 scip Labs: https://www.scip.ch/en/?labs.20161013 Entryinfo Created: 03/27/2026 10:04 Changes: 03/27/2026 10:04 (56) Complete: 🔍 Submitter: wxhwxhwxh_mie Cache ID: 99:D97:101 Submitinfo Accepted Submit #778274: TOTOLINK LR350 LR350 V9.3.5u.6369_B20220309 Buffer Overflow (by wxhwxhwxh_mie) Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸