{"id":"CVE-2025-9146","aliases":["EUVD-2025-28817","GHSA-9j2h-mcj7-4233"],"status":"published","title":"Linksys E5600 Firmware checkFw.sh verify_gemtek_header risky encryption","description":"A flaw has been found in Linksys E5600 1.1.0.26. The affected element is the function verify_gemtek_header of the file checkFw.sh of the component Firmware Handler. Executing manipulation can lead to risky cryptographic algorithm. The attack may be launched remotely. The attack requires a high level of complexity. The exploitability is described as difficult. The vendor was contacted early about this disclosure but did not respond in any way.","severity":{"version":"4.0","score":7.5,"vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00589,"percentile":0.48445,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-310","CWE-327"],"published":"2025-08-19T16:02:06Z","modified":"2026-06-17T10:08:24Z","products":[{"vendor":"linksys","product":"e5600"},{"vendor":"linksys","product":"e5600_firmware"}],"references":[{"url":"https://vuldb.com/?id.320525","tags":["vdb-entry","technical-description","Third Party Advisory","VDB Entry"]},{"url":"https://vuldb.com/?ctiid.320525","tags":["signature","permissions-required","Permissions Required","VDB Entry"]},{"url":"https://vuldb.com/?submit.628642","tags":["third-party-advisory","Third Party Advisory","VDB Entry"]},{"url":"https://github.com/IOTRes/IOT_Firmware_Update/blob/main/Linksys/E5600.md","tags":["patch","exploit","Exploit","Third Party Advisory"]},{"url":"https://www.linksys.com/","tags":["product","Product"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-9146"},{"url":"https://www.linksys.com"},{"url":"https://github.com/advisories/GHSA-9j2h-mcj7-4233"}],"sources":{"cve":[{"id":"CVE-2025-9146","title":"Linksys E5600 Firmware checkFw.sh verify_gemtek_header risky encryption","description":"A flaw has been found in Linksys E5600 1.1.0.26. The affected element is the function verify_gemtek_header of the file checkFw.sh of the component Firmware Handler. Executing manipulation can lead to risky cryptographic algorithm. The attack may be launched remotely. The attack requires a high level of complexity. The exploitability is described as difficult. The vendor was contacted early about this disclosure but did not respond in any way.","status":"published","published":"2025-08-19T16:02:06.364Z","modified":"2025-08-19T19:20:28.216Z","cvss":[{"version":"4.0","score":7.5,"vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X","level":"high","assessor":"cna"},{"version":"3.1","score":6.6,"vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H/E:X/RL:X/RC:R","level":"medium","assessor":"cna"},{"version":"3.0","score":6.6,"vector":"CVSS:3.0/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H/E:X/RL:X/RC:R","level":"medium","assessor":"cna"},{"version":"2.0","score":6.8,"vector":"AV:N/AC:H/Au:M/C:C/I:C/A:C/E:ND/RL:ND/RC:UR","assessor":"cna"}],"cwes":["CWE-327","CWE-310"],"updated_at":"2026-11-02T14:32:33.755525Z"}],"euvd":[{"id":"EUVD-2025-28817","description":"A flaw has been found in Linksys E5600 1.1.0.26. The affected element is the function verify_gemtek_header of the file checkFw.sh of the component Firmware Handler. Executing manipulation can lead to risky cryptographic algorithm. The attack may be launched remotely. The attack requires a high level of complexity. The exploitability is described as difficult. The vendor was contacted early about this disclosure but did not respond in any way.","status":"published","published":"2025-08-19T16:02:06Z","modified":"2025-08-19T19:20:28Z","cvss":[{"version":"4.0","score":7.5,"vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X","level":"high"}],"updated_at":"2026-11-02T20:31:55.90596Z"}],"ghsa":[{"id":"GHSA-9j2h-mcj7-4233","title":"A flaw has been found in Linksys E5600 1.1.0.26. The affected element is the function...","description":"A flaw has been found in Linksys E5600 1.1.0.26. The affected element is the function verify_gemtek_header of the file checkFw.sh of the component Firmware Handler. Executing manipulation can lead to risky cryptographic algorithm. The attack may be launched remotely. The attack requires a high level of complexity. The exploitability is described as difficult. The vendor was contacted early about this disclosure but did not respond in any way.","status":"published","published":"2025-08-19T18:31:32Z","modified":"2025-09-12T15:31:41Z","cvss":[{"version":"4.0","score":7.5,"vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:H/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":6.6,"vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"medium"}],"cwes":["CWE-327"],"updated_at":"2026-11-02T15:03:34.910007Z"}],"nvd":[{"id":"CVE-2025-9146","description":"A flaw has been found in Linksys E5600 1.1.0.26. The affected element is the function verify_gemtek_header of the file checkFw.sh of the component Firmware Handler. Executing manipulation can lead to risky cryptographic algorithm. The attack may be launched remotely. The attack requires a high level of complexity. The exploitability is described as difficult. The vendor was contacted early about this disclosure but did not respond in any way.","status":"published","published":"2025-08-19T16:15:29.7Z","modified":"2026-06-17T10:08:24.863Z","cvss":[{"version":"4.0","score":7.5,"vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:H/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":6.6,"vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"medium","assessor":"secondary"},{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":6.8,"vector":"AV:N/AC:H/Au:M/C:C/I:C/A:C","level":"medium","assessor":"secondary"}],"cwes":["CWE-310","CWE-327"],"updated_at":"2026-11-02T14:11:24.730342Z"}]}}