{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2025-66266 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2025-66266 yet. Limit exposure of the affected software until one is available.","what":"CVE-2025-66266 is a critical vulnerability in MegaTec Taiwan UPSilon2000V6.0, published on 26 Nov 2025. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2025-66266 and fix it if it is affected.\n\nWhat it is: CVE-2025-66266 is a critical vulnerability in MegaTec Taiwan UPSilon2000V6.0, published on 26 Nov 2025. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2025-66266 in the wild and no public exploit code.\n\nAffected product: MegaTec Taiwan UPSilon2000V6.0. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2025-66266/ (Markdown: https://insights.sbomify.com/CVE-2025-66266/index.md)","id":"CVE-2025-66266","markdown":"https://insights.sbomify.com/CVE-2025-66266/index.md","name":"CVE-2025-66266","record":{"aliases":["GHSA-9553-998g-436x"],"analysis":{"component_type":"desktop_application","fix_type":"no_fix_stated","impacts":["code_execution","privilege_escalation"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"UPS monitoring software","requires_auth":"none","summary":"Local attackers can escalate privileges to SYSTEM by replacing the RupsMon.exe service executable due to insecure file permissions.","user_interaction":"not_required","vuln_class":"privilege_escalation"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Gridware","cpe":[],"cvss":{"score":9.3,"severity":"critical","source":"cna","vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N","version":"4.0"},"cwes":[{"id":"CWE-269","name":"Improper Privilege Management"}],"description":"The RupsMon.exe service executable in UPSilon 2000 has insecure permissions, allowing the 'Everyone' group Full Control. A local attacker can replace the executable with a malicious binary to execute code with SYSTEM privileges or simply change the config path of the service to a command; starting and stopping the service to immediately achieve code execution and privilege escalation","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":null,"headline":"Insecure SYSTEM Service Permissions in UPSilon2000V6.0 (RupsMon.exe) leading to trivial Local Privilege Escalation","id":"CVE-2025-66266","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"privilege_escalation","year":"2025"},"n_packages":0,"n_references":1,"next":{"headline":"Unquoted Service Path in UPSilon2000V6.0(RupsMon and USBMate) running as SYSTEM","id":"CVE-2025-66269"},"packages":[],"prev":{"headline":"Insecure permissions in configuration directory (C:\\\\usr)","id":"CVE-2025-66265"},"products":["UPSilon2000V6.0"],"published":"2025-11-26","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2025-11-26","vendors":["MegaTec Taiwan"]},"summary":"Local attackers can escalate privileges to SYSTEM by replacing the RupsMon.exe service executable due to insecure file permissions.","url":"https://insights.sbomify.com/CVE-2025-66266/"}