{"id":"CVE-2026-11841","title":"An attacker may perform unauthenticated read and write operations on sensitive filesystem areas via the AppEngine Fileaccess over HTTP due to improper access restrictions","summary":"An attacker may perform unauthenticated read and write operations on sensitive filesystem areas via the AppEngine Fileaccess over HTTP due to improper access restrictions. A critical filesystem directory was unintentionally exposed throu…","severity":"critical","cvss":9.4,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L","cwe":["CWE-552"],"published":"2026-07-28","updated":"2026-09-09","sourceUpdated":"2026-09-09T15:52:04.827","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-11841","references":[{"url":"https://www.cisa.gov/resources-tools/resources/ics-recommended-practices","label":"psirt@sick.de"},{"url":"https://www.first.org/cvss/calculator/3.1","label":"psirt@sick.de"},{"url":"https://www.sick.com/.well-known/csaf/white/2026/sca-2026-0010.json","label":"psirt@sick.de"},{"url":"https://www.sick.com/.well-known/csaf/white/2026/sca-2026-0010.pdf","label":"psirt@sick.de"},{"url":"https://www.sick.com/media/docs/9/19/719/special_information_sick_operating_guidelines_cybersecurity_by_sick_en_im0106719.pdf","label":"psirt@sick.de"},{"url":"https://www.sick.com/psirt","label":"psirt@sick.de"}],"tags":["nvd"],"epss":0.00854,"epssPercentile":0.56503,"ingestedAt":"2026-09-09T16:14:05.510Z","slug":"CVE-2026-11841","body":"## Overview\n\nAn attacker may perform unauthenticated read and write operations on sensitive filesystem areas via the AppEngine Fileaccess over HTTP due to improper access restrictions. A critical filesystem directory was unintentionally exposed through the HTTP-based file access feature, allowing access without authentication. This includes device parameter files, enabling an attacker to read and modify application settings, including customer-defined passwords. Additionally, exposure of the custom application directory may allow execution of arbitrary Lua code within the sandboxed AppEngine environment.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":52,"depthScoreParts":{"impact":51.7,"likelihood":0.2,"exploitation":0,"ransomware":0},"changes":[]}