{"id":"CVE-2026-34122","aliases":["EUVD-2026-18434","GHSA-hx8v-fm8j-mj2j"],"status":"published","title":"Stack-based Buffer Overflow Leading to Denial of Service in TP-Link Tapo C520WS","description":"A stack-based buffer overflow vulnerability was identified in TP-Link Tapo C520WS v2.6 within a configuration handling component due to insufficient input validation.  An attacker can exploit this vulnerability by supplying an excessively long value for a vulnerable configuration parameter, resulting in a stack overflow.\n\nSuccessful exploitation results in Denial-of-Service (DoS) condition, leading to a service crash or device reboot, impacting availability.","severity":{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00271,"percentile":0.19719,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-121"],"published":"2026-04-02T17:20:12Z","modified":"2026-07-24T21:10:00Z","products":[{"vendor":"tp-link","product":"tapo_c520ws_firmware"},{"vendor":"tp-link systems inc.","product":"tapo c520ws v2.6"}],"references":[{"url":"https://www.tp-link.com/us/support/download/tapo-c520ws/#Firmware-Release-Notes","tags":["patch","Release Notes"]},{"url":"https://www.tp-link.com/en/support/download/tapo-c520ws/#Firmware-Release-Notes","tags":["patch","Release Notes"]},{"url":"https://www.tp-link.com/us/support/faq/5047/","tags":["vendor-advisory","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-34122"},{"url":"https://www.tp-link.com/us/support/faq/5047"},{"url":"https://github.com/advisories/GHSA-hx8v-fm8j-mj2j"}],"sources":{"cve":[{"id":"CVE-2026-34122","title":"Stack-based Buffer Overflow Leading to Denial of Service in TP-Link Tapo C520WS","description":"A stack-based buffer overflow vulnerability was identified in TP-Link Tapo C520WS v2.6 within a configuration handling component due to insufficient input validation.  An attacker can exploit this vulnerability by supplying an excessively long value for a vulnerable configuration parameter, resulting in a stack overflow.\n\nSuccessful exploitation results in Denial-of-Service (DoS) condition, leading to a service crash or device reboot, impacting availability.","status":"published","published":"2026-04-02T17:20:12.471Z","modified":"2026-04-02T17:59:32.667Z","cvss":[{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna"}],"cwes":["CWE-121"],"updated_at":"2026-11-02T14:20:14.302133Z"}],"euvd":[{"id":"EUVD-2026-18434","description":"A stack-based buffer overflow vulnerability was identified in TP-Link Tapo C520WS v2.6 within a configuration handling component due to insufficient input validation.  An attacker can exploit this vulnerability by supplying an excessively long value for a vulnerable configuration parameter, resulting in a stack overflow.\n\nSuccessful exploitation results in Denial-of-Service (DoS) condition, leading to a service crash or device reboot, impacting availability.","status":"published","published":"2026-04-02T17:20:12Z","modified":"2026-04-02T17:59:32Z","cvss":[{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-02T19:25:22.606516Z"}],"ghsa":[{"id":"GHSA-hx8v-fm8j-mj2j","title":"A stack-based buffer overflow vulnerability was identified in TP-Link Tapo C520WS v2.6 within a...","description":"A stack-based buffer overflow vulnerability was identified in TP-Link Tapo C520WS v2.6 within a configuration handling component due to insufficient input validation.  An attacker can exploit this vulnerability by supplying an excessively long value for a vulnerable configuration parameter, resulting in a stack overflow.\n\nSuccessful exploitation results in Denial-of-Service (DoS) condition, leading to a service crash or device reboot, impacting availability.","status":"published","published":"2026-04-02T18:31:38Z","modified":"2026-04-06T21:31:34Z","cvss":[{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/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":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-121"],"updated_at":"2026-11-02T15:07:10.409602Z"}],"nvd":[{"id":"CVE-2026-34122","description":"A stack-based buffer overflow vulnerability was identified in TP-Link Tapo C520WS v2.6 within a configuration handling component due to insufficient input validation.  An attacker can exploit this vulnerability by supplying an excessively long value for a vulnerable configuration parameter, resulting in a stack overflow.\n\nSuccessful exploitation results in Denial-of-Service (DoS) condition, leading to a service crash or device reboot, impacting availability.","status":"published","published":"2026-04-02T18:16:29.15Z","modified":"2026-07-24T21:10:00.143Z","cvss":[{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/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":6.5,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"}],"cwes":["CWE-121"],"updated_at":"2026-11-02T14:12:12.73929Z"}]}}