CVE-2026-6157 | Totolink A800R 4.1.2cu.5137_B20200730 /lib/cste_modules/app.so setAppEasyWizardConfig apcliSsid buffer overflow

VDB-357037 · CVE-2026-6157 · SUBMIT #357037 TOTOLINK A800R 4.1.2CU.5137_B20200730 /LIB/CSTE_MODULES/APP.SO SETAPPEASYWIZARDCONFIG APCLISSID BUFFER OVERFLOW HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 8.0 $0-$5k 2.73+ Summaryinfo A vulnerability identified as critical has been detected in Totolink A800R 4.1.2cu.5137_B20200730. Affected is the function setAppEasyWizardConfig in the library /lib/cste_modules/app.so. This manipulation of the argument apcliSsid causes buffer overflow. This vulnerability is tracked as CVE-2026-6157. The attack is possible to be carried out remotely. Moreover, an exploit is present. Detailsinfo A vulnerability was found in Totolink A800R 4.1.2cu.5137_B20200730. It has been declared as critical. Affected by this vulnerability is the function setAppEasyWizardConfig in the library /lib/cste_modules/app.so. The manipulation of the argument apcliSsid 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. The advisory is shared at github.com. This vulnerability is known as CVE-2026-6157. 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 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 A800R Version 4.1.2cu.5137_B20200730 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 04/12/2026 Advisory disclosed 04/12/2026 +0 days VulDB entry created 04/12/2026 +0 days VulDB entry last update Sourcesinfo Vendor: totolink.net Advisory: github.com Status: Not defined CVE: CVE-2026-6157 (🔒) GCVE (CVE): GCVE-0-2026-6157 GCVE (VulDB): GCVE-100-357037 scip Labs: https://www.scip.ch/en/?labs.20161013 Entryinfo Created: 04/12/2026 20:11 Changes: 04/12/2026 20:11 (57) Complete: 🔍 Submitter: xuanyu Cache ID: 99:EDE:101 Submitinfo Accepted Submit #793114: TOTOLINK A800R V4.1.2cu.5137_B20200730 Buffer Overflow (by xuanyu) Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸