{"answers":{"affected":"It affects 4 products.","exploited":"There is no known exploitation of CVE-2020-15786 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2020-15786 yet. Limit exposure of the affected software until one is available.","what":"CVE-2020-15786 is a critical authentication bypass vulnerability in Siemens SIMATIC HMI Basic Panels 2nd Generation (incl. SIPLUS variants), published on 9 Sep 2020. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2020-15786 and fix it if it is affected.\n\nWhat it is: CVE-2020-15786 is a critical authentication bypass vulnerability in Siemens SIMATIC HMI Basic Panels 2nd Generation (incl. SIPLUS variants), published on 9 Sep 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2020-15786 in the wild and no public exploit code.\n\nAffected product: Siemens SIMATIC HMI Basic Panels 2nd Generation (incl. SIPLUS variants). 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-2020-15786/ (Markdown: https://insights.sbomify.com/CVE-2020-15786/index.md)","id":"CVE-2020-15786","markdown":"https://insights.sbomify.com/CVE-2020-15786/index.md","name":"CVE-2020-15786","record":{"aliases":["GHSA-9hp3-3v8x-gvhx"],"analysis":{"component_type":"ics_ot","fix_type":"upgrade","impacts":["account_takeover"],"network_reachable":"yes","non_default_config":false,"product_category":"Siemens HMI Panels","requires_auth":"none","summary":"Remote attackers can brute-force passwords to gain unauthorized access to Sm@rt Server due to insufficient blocking of authentication attempts.","user_interaction":"not_required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"siemens","cpe":[{"product":"simatic_hmi_basic_panels_2nd_generation_firmware","vendor":"siemens"},{"product":"simatic_hmi_comfort_panels_firmware","vendor":"siemens"},{"product":"simatic_hmi_mobile_panels_firmware","vendor":"siemens"},{"product":"simatic_hmi_united_comfort_panels_firmware","vendor":"siemens"}],"cvss":{"score":9.8,"severity":"critical","source":"cisa-adp","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-307","name":"Improper Restriction of Excessive Authentication Attempts"}],"description":"A vulnerability has been identified in SIMATIC HMI Basic Panels 2nd Generation (incl. SIPLUS variants) (All versions \u003c V16), SIMATIC HMI Comfort Panels (incl. SIPLUS variants) (All versions \u003c= V16), SIMATIC HMI Mobile Panels (All versions \u003c= V16), SIMATIC HMI Unified Comfort Panels (All versions \u003c= V16). Affected devices insufficiently block excessive authentication attempts. This could allow a remote attacker to discover user passwords and obtain access to the Sm@rt Server via a brute-force attack.","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":"Auth bypass in SIMATIC HMI Basic Panels 2nd Generation (incl. SIPLUS variants)","id":"CVE-2020-15786","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"auth_bypass","year":"2020"},"n_packages":0,"n_references":1,"next":{"headline":"Auth bypass in SIMATIC HMI Unified Comfort Panels","id":"CVE-2020-15787"},"packages":[],"prev":{"headline":"Information disclosure in Siveillance Video Client","id":"CVE-2020-15785"},"products":["SIMATIC HMI Basic Panels 2nd Generation (incl. SIPLUS variants)","SIMATIC HMI Comfort Panels (incl. SIPLUS variants)","SIMATIC HMI Mobile Panels","SIMATIC HMI Unified Comfort Panels"],"published":"2020-09-09","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":"yes","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-06-02","vendors":["Siemens"]},"summary":"Remote attackers can brute-force passwords to gain unauthorized access to Sm@rt Server due to insufficient blocking of authentication attempts.","url":"https://insights.sbomify.com/CVE-2020-15786/"}