{"id":"CVE-2025-4496","aliases":["EUVD-2025-14220","GHSA-96qf-wf2v-wxvc"],"status":"published","title":"TOTOLINK T10/A3100R/A950RG/A800R/N600R/A3000RU/A810R cstecgi.cgi CloudACMunualUpdate buffer overflow","description":"A vulnerability was found in TOTOLINK T10, A3100R, A950RG, A800R, N600R, A3000RU and A810R 4.1.8cu.5241_B20210927. It has been declared as critical. This vulnerability affects the function CloudACMunualUpdate of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument FileName leads to buffer overflow. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used.","severity":{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.01253,"percentile":0.69835,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-119","CWE-120"],"published":"2025-05-10T05:00:10Z","modified":"2026-06-17T09:33:22Z","products":[{"vendor":"totolink","product":"a3000ru"},{"vendor":"totolink","product":"a3000ru_firmware"},{"vendor":"totolink","product":"a3100r"},{"vendor":"totolink","product":"a3100r_firmware"},{"vendor":"totolink","product":"a800r"},{"vendor":"totolink","product":"a800r_firmware"},{"vendor":"totolink","product":"a810r"},{"vendor":"totolink","product":"a810r_firmware"},{"vendor":"totolink","product":"a950rg"},{"vendor":"totolink","product":"a950rg_firmware"},{"vendor":"totolink","product":"n600r"},{"vendor":"totolink","product":"n600r_firmware"},{"vendor":"totolink","product":"t10"},{"vendor":"totolink","product":"t10_firmware"}],"references":[{"url":"https://vuldb.com/?id.308212","tags":["vdb-entry","technical-description","Third Party Advisory","VDB Entry"]},{"url":"https://vuldb.com/?ctiid.308212","tags":["signature","permissions-required","Permissions Required","VDB Entry"]},{"url":"https://vuldb.com/?submit.567081","tags":["third-party-advisory","Third Party Advisory","VDB Entry"]},{"url":"https://github.com/CH13hh/tmp_store_cc/blob/main/tt/ta/1.md","tags":["exploit","Broken Link"]},{"url":"https://www.totolink.net/","tags":["product","Product"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-4496"},{"url":"https://www.totolink.net"},{"url":"https://github.com/advisories/GHSA-96qf-wf2v-wxvc"}],"sources":{"cve":[{"id":"CVE-2025-4496","title":"TOTOLINK T10/A3100R/A950RG/A800R/N600R/A3000RU/A810R cstecgi.cgi CloudACMunualUpdate buffer overflow","description":"A vulnerability was found in TOTOLINK T10, A3100R, A950RG, A800R, N600R, A3000RU and A810R 4.1.8cu.5241_B20210927. It has been declared as critical. This vulnerability affects the function CloudACMunualUpdate of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument FileName leads to buffer overflow. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used.","status":"published","published":"2025-05-10T05:00:10.763Z","modified":"2025-05-12T19:30:55.738Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna"},{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna"},{"version":"3.0","score":8.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna"},{"version":"2.0","score":9,"vector":"AV:N/AC:L/Au:S/C:C/I:C/A:C","assessor":"cna"}],"cwes":["CWE-120","CWE-119"],"updated_at":"2026-11-02T14:32:48.853452Z"}],"euvd":[{"id":"EUVD-2025-14220","description":"A vulnerability was found in TOTOLINK T10, A3100R, A950RG, A800R, N600R, A3000RU and A810R 4.1.8cu.5241_B20210927. It has been declared as critical. This vulnerability affects the function CloudACMunualUpdate of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument FileName leads to buffer overflow. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used.","status":"published","published":"2025-05-10T05:00:10Z","modified":"2025-05-12T19:30:55Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-02T20:32:49.308721Z"}],"ghsa":[{"id":"GHSA-96qf-wf2v-wxvc","title":"A vulnerability was found in TOTOLINK T10, A3100R, A950RG, A800R, N600R, A3000RU and A810R 4.1...","description":"A vulnerability was found in TOTOLINK T10, A3100R, A950RG, A800R, N600R, A3000RU and A810R 4.1.8cu.5241_B20210927. It has been declared as critical. This vulnerability affects the function CloudACMunualUpdate of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument FileName leads to buffer overflow. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used.","status":"published","published":"2025-05-10T06:30:18Z","modified":"2025-08-10T05:04:43Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high"},{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-119","CWE-120"],"updated_at":"2026-11-02T15:03:13.733281Z"}],"nvd":[{"id":"CVE-2025-4496","description":"A vulnerability was found in TOTOLINK T10, A3100R, A950RG, A800R, N600R, A3000RU and A810R 4.1.8cu.5241_B20210927. It has been declared as critical. This vulnerability affects the function CloudACMunualUpdate of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument FileName leads to buffer overflow. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used.","status":"published","published":"2025-05-10T05:15:50.61Z","modified":"2026-06-17T09:33:22.937Z","cvss":[{"version":"4.0","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high","assessor":"secondary"},{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":9,"vector":"AV:N/AC:L/Au:S/C:C/I:C/A:C","level":"high","assessor":"secondary"}],"cwes":["CWE-119","CWE-120"],"updated_at":"2026-11-02T14:11:07.176032Z"}]}}