{"answers":{"affected":"It affects 9 products.","exploited":"There is no known exploitation of CVE-2019-15803 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2019-15803 yet. Limit exposure of the affected software until one is available.","what":"CVE-2019-15803 is a critical authentication bypass vulnerability in n/a, published on 14 Nov 2019. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2019-15803 and fix it if it is affected.\n\nWhat it is: CVE-2019-15803 is a critical authentication bypass vulnerability in n/a, published on 14 Nov 2019. 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-2019-15803 in the wild and no public exploit code.\n\nAffected product: n/a. 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-2019-15803/ (Markdown: https://insights.sbomify.com/CVE-2019-15803/index.md)","id":"CVE-2019-15803","markdown":"https://insights.sbomify.com/CVE-2019-15803/index.md","name":"CVE-2019-15803","record":{"aliases":["GHSA-958f-78j2-fqr6"],"analysis":{"component_type":"network_device","fix_type":"upgrade","impacts":["privilege_escalation","data_read","data_modify"],"network_reachable":"yes","non_default_config":false,"product_category":"Zyxel network switch","requires_auth":"none","summary":"Attackers can bypass authentication to access a diagnostics shell on Zyxel switches, allowing arbitrary register access and configuration changes.","user_interaction":"not_required","vuln_class":"auth_bypass"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[{"product":"gs1900-10hp_firmware","vendor":"zyxel"},{"product":"gs1900-16_firmware","vendor":"zyxel"},{"product":"gs1900-24_firmware","vendor":"zyxel"},{"product":"gs1900-24e_firmware","vendor":"zyxel"},{"product":"gs1900-24hp_firmware","vendor":"zyxel"},{"product":"gs1900-48_firmware","vendor":"zyxel"},{"product":"gs1900-48hp_firmware","vendor":"zyxel"},{"product":"gs1900-8_firmware","vendor":"zyxel"},{"product":"gs1900-8hp_firmware","vendor":"zyxel"}],"cvss":{"score":9.1,"severity":"critical","source":"nvd","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","version":"3.1"},"cwes":[{"id":"CWE-287","name":"Improper Authentication"}],"description":"An issue was discovered on Zyxel GS1900 devices with firmware before 2.50(AAHH.0)C0. Through an undocumented sequence of keypresses, undocumented functionality is triggered. A diagnostics shell is triggered via CTRL-ALT-t, which prompts for the password returned by fds_sys_passDebugPasswd_ret(). The firmware contains access control checks that determine if remote users are allowed to access this functionality. The function that performs this check (fds_sys_remoteDebugEnable_ret in libfds.so) always return TRUE with no actual checks performed. The diagnostics menu allows for reading/writing arbitrary registers and various other configuration parameters which are believed to be related to the network interface chips.","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 n/a","id":"CVE-2019-15803","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"auth_bypass","year":"2019"},"n_packages":0,"n_references":2,"next":{"headline":"Security feature bypass in n/a","id":"CVE-2019-15804"},"packages":[],"prev":{"headline":"Hardcoded credentials in n/a","id":"CVE-2019-15802"},"products":["n/a"],"published":"2019-11-14","related":[{"cvss_score":8.8,"headline":"Zyxel GS1900 Series Switches Stack-Based Buffer Overflow","id":"CVE-2026-7273","kev_date_added":"2026-09-21","published":"2026-06-16"},{"cvss_score":9.8,"headline":"Command injection in n/a","id":"CVE-2019-15800","kev_date_added":null,"published":"2019-11-14"},{"cvss_score":9.8,"headline":"Hardcoded credentials in n/a","id":"CVE-2015-5988","kev_date_added":null,"published":"2015-12-31"},{"cvss_score":9.8,"headline":"Auth bypass in n/a","id":"CVE-2015-5989","kev_date_added":null,"published":"2015-12-31"},{"cvss_score":8.8,"headline":"Privilege escalation in n/a","id":"CVE-2019-15799","kev_date_added":null,"published":"2019-11-14"},{"cvss_score":8.8,"headline":"Cross-site request forgery in n/a","id":"CVE-2015-5990","kev_date_added":null,"published":"2015-12-31"}],"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":"2024-08-05","vendors":["n/a"]},"summary":"Attackers can bypass authentication to access a diagnostics shell on Zyxel switches, allowing arbitrary register access and configuration changes.","url":"https://insights.sbomify.com/CVE-2019-15803/"}