{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-27648 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-27648 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-27648 is a critical vulnerability in Synology Antivirus Essential, published on 28 Apr 2021. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2021-27648 and fix it if it is affected.\n\nWhat it is: CVE-2021-27648 is a critical vulnerability in Synology Antivirus Essential, published on 28 Apr 2021. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2021-27648 in the wild and no public exploit code.\n\nAffected product: Synology Antivirus Essential. 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-2021-27648/ (Markdown: https://insights.sbomify.com/CVE-2021-27648/index.md)","id":"CVE-2021-27648","markdown":"https://insights.sbomify.com/CVE-2021-27648/index.md","name":"CVE-2021-27648","record":{"aliases":["GHSA-55vq-f28f-xgcc"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["privilege_escalation"],"network_reachable":"yes","non_default_config":false,"product_category":"Synology Antivirus Essential","requires_auth":"low_privilege","summary":"Remote authenticated users can escalate privileges in Synology Antivirus Essential due to externally controlled resource references in quarantine functionality.","user_interaction":"required","vuln_class":"other"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"synology","cpe":[{"product":"antivirus_essential","vendor":"synology"}],"cvss":{"score":9,"severity":"critical","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-610","name":"Externally Controlled Reference to a Resource in Another Sphere"}],"description":"Externally controlled reference to a resource in another sphere in quarantine functionality in Synology Antivirus Essential before 1.4.8-2801 allows remote authenticated users to obtain privilege via unspecified vectors.","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":"Other in Synology Antivirus Essential","id":"CVE-2021-27648","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"other","year":"2021"},"n_packages":0,"n_references":1,"next":{"headline":"Use after free in DiskStation Manager (DSM)","id":"CVE-2021-27649"},"packages":[],"prev":{"headline":"Memory corruption in Synology DiskStation Manager (DSM)","id":"CVE-2021-27647"},"products":["Synology Antivirus Essential"],"published":"2021-04-28","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"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":"2024-09-16","vendors":["Synology"]},"summary":"Remote authenticated users can escalate privileges in Synology Antivirus Essential due to externally controlled resource references in quarantine functionality.","url":"https://insights.sbomify.com/CVE-2021-27648/"}