{"id":"CVE-2025-66620","title":"An unused webshell in MicroServer allows unlimited login attempts, with sudo rights on certain files and directories","summary":"An unused webshell in MicroServer allows unlimited login attempts, with sudo rights on certain files and directories. An attacker with admin access to MicroServer can gain limited shell access, enabling persistence through reverse shells…","severity":"high","cvss":8,"cvssVector":"CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-553"],"vendor":"columbiaweather","product":"weather_microserver_firmware","affected":["weather_microserver_firmware < MS_4.1_14142"],"patched":["weather_microserver_firmware MS_4.1_14142"],"published":"2026-01-07","updated":"2026-09-30","sourceUpdated":"2026-09-30T23:10:00.237","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-66620","references":[{"url":"https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-006-01.json","label":"ics-cert@hq.dhs.gov"},{"url":"https://www.cisa.gov/news-events/ics-advisories/icsa-26-006-01","label":"ics-cert@hq.dhs.gov"}],"tags":["nvd"],"epss":0.00454,"epssPercentile":0.37022,"ingestedAt":"2026-09-30T23:29:32.557Z","slug":"CVE-2025-66620","body":"## Overview\n\nAn unused webshell in MicroServer allows unlimited login attempts, with sudo rights on certain files and directories. An attacker with admin access to MicroServer can gain limited shell access, enabling persistence through reverse shells, and the ability to modify or remove data stored in the file system.\n\n## Affected\n\n- `weather_microserver_firmware < MS_4.1_14142`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `weather_microserver_firmware MS_4.1_14142`","depth":"twilight","depthScore":44,"depthScoreParts":{"impact":44,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}