{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2021-47705 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-47705 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-47705 is a high-severity memory corruption vulnerability in COMMAX UMS Client ActiveX Control, published on 9 Dec 2025. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2021-47705 and fix it if it is affected.\n\nWhat it is: CVE-2021-47705 is a high-severity memory corruption vulnerability in COMMAX UMS Client ActiveX Control, published on 9 Dec 2025. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2021-47705 in the wild and no public exploit code.\n\nAffected product: COMMAX UMS Client ActiveX Control. 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-2021-47705/ (Markdown: https://insights.sbomify.com/CVE-2021-47705/index.md)","id":"CVE-2021-47705","markdown":"https://insights.sbomify.com/CVE-2021-47705/index.md","name":"CVE-2021-47705","record":{"aliases":["GHSA-hx89-cwv8-4xch"],"analysis":{"component_type":"desktop_application","fix_type":"patch","impacts":["code_execution","privilege_escalation"],"network_reachable":"yes","non_default_config":false,"product_category":"COMMAX UMS Client","requires_auth":"none","summary":"Heap-based buffer overflow in COMMAX UMS Client ActiveX Control allows attackers to execute arbitrary code via long string arrays.","user_interaction":"required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[],"cvss":{"score":8.7,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-787","name":"Out-of-bounds Write"}],"description":"COMMAX UMS Client ActiveX Control 1.7.0.2 contains a heap-based buffer overflow vulnerability that allows attackers to execute arbitrary code by providing excessively long string arrays through multiple functions. Attackers can exploit improper boundary validation in CNC_Ctrl.dll to cause heap corruption and potentially gain system-level access.","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":"CNC_Ctrl DllUnregisterServer Access Violation","id":"CVE-2021-47705","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"memory_corruption","year":"2021"},"n_packages":0,"n_references":4,"next":{"headline":"COMMAX Biometric Access Control System Authentication Bypass","id":"CVE-2021-47706"},"packages":[],"prev":{"headline":"OpenBMCS SQL Injection via obix_test.php","id":"CVE-2021-47704"},"products":["COMMAX UMS Client ActiveX Control"],"published":"2025-12-09","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":"partial"},"state":"PUBLISHED","updated":"2026-04-07","vendors":["COMMAX Co., Ltd."]},"summary":"Heap-based buffer overflow in COMMAX UMS Client ActiveX Control allows attackers to execute arbitrary code via long string arrays.","url":"https://insights.sbomify.com/CVE-2021-47705/"}