{"id":"CVE-2014-125122","aliases":["EUVD-2014-9815","GHSA-6r87-23pq-fxxg"],"status":"published","title":"Linksys WRT120N tmUnblock.cgi Stack-Based Buffer Overflow Admin Password Reset","description":"A stack-based buffer overflow vulnerability exists in the tmUnblock.cgi endpoint of the Linksys WRT120N wireless router. The vulnerability is triggered by sending a specially crafted HTTP POST request with an overly long TM_Block_URL parameter to the endpoint. By exploiting this flaw, an unauthenticated remote attacker can overwrite memory in a controlled manner, enabling them to temporarily reset the administrator password of the device to a blank value. This grants unauthorized access to the router’s web management interface without requiring valid credentials.","severity":{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.01274,"percentile":0.70107,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-121"],"published":"2025-07-31T14:57:59Z","modified":"2026-06-17T00:04:30Z","exploits":[{"source":"metasploit","id":"auxiliary/admin/http/linksys_tmunblock_admin_reset_bof","title":"Linksys WRT120N tmUnblock Stack Buffer Overflow","type":"auxiliary","date":"2014-02-19","verified":true,"url":"https://www.rapid7.com/db/modules/auxiliary/admin/http/linksys_tmunblock_admin_reset_bof"}],"products":[{"vendor":"linksys","product":"wrt120n"}],"references":[{"url":"https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/auxiliary/admin/http/linksys_tmunblock_admin_reset_bof.rb","tags":["exploit"]},{"url":"https://www.exploit-db.com/exploits/31758","tags":["exploit"]},{"url":"https://web.archive.org/web/20210424073058/http://www.devttys0.com/2014/02/wrt120n-fprintf-stack-overflow/","tags":["technical-description","exploit"]},{"url":"https://www.vulncheck.com/advisories/linksys-wrt120n-stack-based-buffer-overflow-admin-password-reset","tags":["third-party-advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2014-125122"},{"url":"https://web.archive.org/web/20210424073058/http://www.devttys0.com/2014/02/wrt120n-fprintf-stack-overflow"},{"url":"https://github.com/advisories/GHSA-6r87-23pq-fxxg"}],"sources":{"cve":[{"id":"CVE-2014-125122","title":"Linksys WRT120N tmUnblock.cgi Stack-Based Buffer Overflow Admin Password Reset","description":"A stack-based buffer overflow vulnerability exists in the tmUnblock.cgi endpoint of the Linksys WRT120N wireless router. The vulnerability is triggered by sending a specially crafted HTTP POST request with an overly long TM_Block_URL parameter to the endpoint. By exploiting this flaw, an unauthenticated remote attacker can overwrite memory in a controlled manner, enabling them to temporarily reset the administrator password of the device to a blank value. This grants unauthorized access to the router’s web management interface without requiring valid credentials.","status":"published","published":"2025-07-31T14:57:59.666Z","modified":"2026-04-07T14:03:26.941Z","cvss":[{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N","level":"medium","assessor":"cna"}],"cwes":["CWE-121"],"updated_at":"2026-11-02T14:33:42.219637Z"}],"euvd":[{"id":"EUVD-2014-9815","description":"A stack-based buffer overflow vulnerability exists in the tmUnblock.cgi endpoint of the Linksys WRT120N wireless router. The vulnerability is triggered by sending a specially crafted HTTP POST request with an overly long TM_Block_URL parameter to the endpoint. By exploiting this flaw, an unauthenticated remote attacker can overwrite memory in a controlled manner, enabling them to temporarily reset the administrator password of the device to a blank value. This grants unauthorized access to the router’s web management interface without requiring valid credentials.","status":"published","published":"2025-07-31T14:57:59Z","modified":"2026-04-07T14:03:26Z","cvss":[{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-02T19:25:14.820353Z"}],"ghsa":[{"id":"GHSA-6r87-23pq-fxxg","title":"A stack-based buffer overflow vulnerability exists in the tmUnblock.cgi endpoint of the Linksys...","description":"A stack-based buffer overflow vulnerability exists in the tmUnblock.cgi endpoint of the Linksys WRT120N wireless router. The vulnerability is triggered by sending a specially crafted HTTP POST request with an overly long TM_Block_URL parameter to the endpoint. By exploiting this flaw, an unauthenticated remote attacker can overwrite memory in a controlled manner, enabling them to temporarily reset the administrator password of the device to a blank value. This grants unauthorized access to the router’s web management interface without requiring valid credentials.","status":"published","published":"2025-07-31T15:35:50Z","modified":"2025-07-31T15:35:56Z","cvss":[{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/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":"medium"}],"cwes":["CWE-121"],"updated_at":"2026-11-02T15:03:09.647668Z"}],"nvd":[{"id":"CVE-2014-125122","description":"A stack-based buffer overflow vulnerability exists in the tmUnblock.cgi endpoint of the Linksys WRT120N wireless router. The vulnerability is triggered by sending a specially crafted HTTP POST request with an overly long TM_Block_URL parameter to the endpoint. By exploiting this flaw, an unauthenticated remote attacker can overwrite memory in a controlled manner, enabling them to temporarily reset the administrator password of the device to a blank value. This grants unauthorized access to the router’s web management interface without requiring valid credentials.","status":"published","published":"2025-07-31T15:15:34.62Z","modified":"2026-06-17T00:04:30.327Z","cvss":[{"version":"4.0","score":5.3,"vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/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":"medium","assessor":"secondary"}],"cwes":["CWE-121"],"updated_at":"2026-11-02T14:02:59.461996Z"}]}}