{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2025-64394 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2025-64394 yet. Limit exposure of the affected software until one is available.","what":"CVE-2025-64394 is a medium-severity vulnerability in Veeam Backup for Microsoft 365, published on 27 Oct 2026."},"fix_prompt":"Check this codebase for CVE-2025-64394 and fix it if it is affected.\n\nWhat it is: CVE-2025-64394 is a medium-severity vulnerability in Veeam Backup for Microsoft 365, published on 27 Oct 2026. \nExploitation: There is no known exploitation of CVE-2025-64394 in the wild and no public exploit code.\n\nAffected product: Veeam Backup for Microsoft 365. 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-2025-64394/ (Markdown: https://insights.sbomify.com/CVE-2025-64394/index.md)","id":"CVE-2025-64394","markdown":"https://insights.sbomify.com/CVE-2025-64394/index.md","name":"CVE-2025-64394","record":{"aliases":["GHSA-9h96-gjgh-c298"],"analysis":null,"analysis_generated_by":null,"assigner":"hackerone","cpe":[],"cvss":{"score":4.3,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:A/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-1386","name":"Insecure Operation on Windows Junction / Mount Point"}],"description":"A vulnerability allowing a low-privileged local user to write arbitrary files with SYSTEM privileges during the installation of Veeam Backup for Microsoft 365, which can lead to privilege escalation or denial of service.","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":"A vulnerability allowing a low-privileged local user to write arbitrary files with SYSTEM privileges during the installation of Veeam Backup","id":"CVE-2025-64394","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":null,"year":"2025"},"n_packages":0,"n_references":1,"next":{"headline":"Insufficient permission checks when pre-enrolling users Summary","id":"CVE-2025-64400"},"packages":[],"prev":{"headline":"Deserialization in Backup and Replication","id":"CVE-2025-64393"},"products":["Backup for Microsoft 365"],"published":"2026-10-27","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":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-10-27","vendors":["Veeam"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2025-64394/"}