{"answers":{"affected":"","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2016-20026 exists.","fix":"No fix has been published for CVE-2016-20026 yet. Limit exposure of the affected software until one is available.","what":"CVE-2016-20026 is a critical vulnerability in ZKTeco ZKBioSecurity, published on 15 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2016-20026 and fix it if it is affected.\n\nWhat it is: CVE-2016-20026 is a critical vulnerability in ZKTeco ZKBioSecurity, published on 15 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2016-20026 exists.\n\nAffected product: ZKTeco ZKBioSecurity. 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-2016-20026/ (Markdown: https://insights.sbomify.com/CVE-2016-20026/index.md)","id":"CVE-2016-20026","markdown":"https://insights.sbomify.com/CVE-2016-20026/index.md","name":"CVE-2016-20026","record":{"aliases":["GHSA-69cj-f4mg-xrg8"],"analysis":{"component_type":"web_application","fix_type":"patch","impacts":["code_execution","privilege_escalation"],"network_reachable":"yes","non_default_config":false,"product_category":"ZKTeco ZKBioSecurity","requires_auth":"none","summary":"Unauthenticated attackers can use hardcoded Tomcat credentials to upload malicious WAR files and execute arbitrary code with SYSTEM privileges.","user_interaction":"not_required","vuln_class":"hardcoded_credentials"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[],"cvss":{"score":9.3,"severity":"critical","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-798","name":"Use of Hard-coded Credentials"}],"description":"ZKTeco ZKBioSecurity 3.0 contains hardcoded credentials in the bundled Apache Tomcat server that allow unauthenticated attackers to access the manager application. Attackers can authenticate with hardcoded credentials stored in tomcat-users.xml to upload malicious WAR archives containing JSP applications and execute arbitrary code with SYSTEM privileges.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":null,"headline":"ZKTeco ZKBioSecurity 3.0 Hardcoded Credentials Remote Code Execution","id":"CVE-2016-20026","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"hardcoded_credentials","year":"2016"},"n_packages":0,"n_references":6,"next":{"headline":"ZKTeco ZKBioSecurity 3.0 Multiple Reflected XSS Vulnerabilities","id":"CVE-2016-20027"},"packages":[],"prev":{"headline":"ZKTeco ZKAccess Professional 3.5.3 Privilege Escalation via Insecure Permissions","id":"CVE-2016-20025"},"products":["ZKTeco ZKBioSecurity"],"published":"2026-03-15","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":"yes","exploitation":"poc","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-07-28","vendors":["ZKTeco Inc."]},"summary":"Unauthenticated attackers can use hardcoded Tomcat credentials to upload malicious WAR files and execute arbitrary code with SYSTEM privileges.","url":"https://insights.sbomify.com/CVE-2016-20026/"}