{"id":"CVE-2026-12339","aliases":["EUVD-2026-55700","GHSA-www9-662g-pffv"],"status":"published","title":"Authenticated Arbitrary File Write Vulnerability in multiple devices","description":"A Zip Slip vulnerability in the WebUI ISP\nUpgrade functionality allows arbitrary file write via a crafted archive\ncontaining directory traversal sequences. An authenticated administrator may\noverwrite arbitrary files on the system.Successful\nexploitation may allow arbitrary file to be overwritten on the underlying system, affecting system integrity and availability.","severity":{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00525,"percentile":0.44848,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-22"],"published":"2026-08-10T18:20:50Z","modified":"2026-10-23T20:10:00Z","products":[{"vendor":"tp-link systems inc.","product":"archer mr200 v7"},{"vendor":"tp-link systems inc.","product":"archer mr600 v2"},{"vendor":"tp-link systems inc.","product":"tl-mr100 v3.20"},{"vendor":"tp-link systems inc.","product":"tl-mr150 v3.20"},{"vendor":"tp-link systems inc.","product":"tl-mr6400 v5.3"},{"vendor":"tp-link systems inc.","product":"tl-mr6400 v8.0"}],"references":[{"url":"https://www.tp-link.com/en/support/download/tl-mr6400/v5.30/#Firmware","tags":["patch"]},{"url":"https://www.tp-link.com/en/support/download/archer-mr600/v2/#Firmware","tags":["patch"]},{"url":"https://www.tp-link.com/en/support/download/archer-mr200/v7/#Firmware","tags":["patch"]},{"url":"https://www.tp-link.com/en/support/faq/5237/","tags":["vendor-advisory"]},{"url":"https://www.tp-link.com/en/support/download/tl-mr100/v3.20/#Firmware","tags":["patch"]},{"url":"https://www.tp-link.com/en/support/download/tl-mr150/v3.20/#Firmware","tags":["patch"]},{"url":"https://www.tp-link.com/en/support/download/tl-mr6400/v8/#Firmware","tags":["patch"]},{"url":"https://www.tp-link.com/kr/support/download/tl-mr100/v3.20/#Firmware","tags":["patch"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-12339"},{"url":"https://www.tp-link.com/en/support/faq/5237"},{"url":"https://github.com/advisories/GHSA-www9-662g-pffv"}],"sources":{"cve":[{"id":"CVE-2026-12339","title":"Authenticated Arbitrary File Write Vulnerability in multiple devices","description":"A Zip Slip vulnerability in the WebUI ISP\nUpgrade functionality allows arbitrary file write via a crafted archive\ncontaining directory traversal sequences. An authenticated administrator may\noverwrite arbitrary files on the system.Successful\nexploitation may allow arbitrary file to be overwritten on the underlying system, affecting system integrity and availability.","status":"published","published":"2026-08-10T18:20:50.576Z","modified":"2026-08-25T23:31:52.397Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N","level":"medium","assessor":"cna"}],"cwes":["CWE-22"],"updated_at":"2026-11-02T14:19:48.461833Z"}],"euvd":[{"id":"EUVD-2026-55700","description":"A Zip Slip vulnerability in the WebUI ISP\nUpgrade functionality allows arbitrary file write via a crafted archive\ncontaining directory traversal sequences. An authenticated administrator may\noverwrite arbitrary files on the system.Successful\nexploitation may allow arbitrary file to be overwritten on the underlying system, affecting system integrity and availability.","status":"published","published":"2026-08-10T18:20:50Z","modified":"2026-08-25T23:31:52Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N","level":"medium"}],"updated_at":"2026-11-02T18:01:31.718552Z"}],"ghsa":[{"id":"GHSA-www9-662g-pffv","title":"A Zip Slip vulnerability in the WebUI ISP\nUpgrade functionality allows arbitrary file write via a...","description":"A Zip Slip vulnerability in the WebUI ISP\nUpgrade functionality allows arbitrary file write via a crafted archive\ncontaining directory traversal sequences. An authenticated administrator may\noverwrite arbitrary files on the system.Successful\nexploitation may allow arbitrary file to overwrite on the underlying system, affecting system integrity and availability.","status":"published","published":"2026-08-10T21:32:02Z","modified":"2026-08-25T21:31:17Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/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-22"],"updated_at":"2026-11-02T15:10:58.645101Z"}],"nvd":[{"id":"CVE-2026-12339","description":"A Zip Slip vulnerability in the WebUI ISP\nUpgrade functionality allows arbitrary file write via a crafted archive\ncontaining directory traversal sequences. An authenticated administrator may\noverwrite arbitrary files on the system.Successful\nexploitation may allow arbitrary file to be overwritten on the underlying system, affecting system integrity and availability.","status":"published","published":"2026-08-10T19:17:28.5Z","modified":"2026-10-23T20:10:00.16Z","cvss":[{"version":"4.0","score":6.9,"vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/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-22"],"updated_at":"2026-11-02T14:12:36.102748Z"}]}}