{"answers":{"affected":"It affects 16 products.","exploited":"There is no known exploitation of CVE-2021-42554 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2021-42554 yet. Limit exposure of the affected software until one is available.","what":"CVE-2021-42554 is a high-severity memory corruption vulnerability in Insyde Insydeh2o, published on 3 Feb 2022. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-42554 and fix it if it is affected.\n\nWhat it is: CVE-2021-42554 is a high-severity memory corruption vulnerability in Insyde Insydeh2o, published on 3 Feb 2022. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2021-42554 in the wild and no public exploit code.\n\nAffected product: Insyde Insydeh2o. 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-2021-42554/ (Markdown: https://insights.sbomify.com/CVE-2021-42554/index.md)","id":"CVE-2021-42554","markdown":"https://insights.sbomify.com/CVE-2021-42554/index.md","name":"CVE-2021-42554","record":{"aliases":["GHSA-9hwg-wq94-95pr"],"analysis":{"component_type":"hardware_firmware","fix_type":"upgrade","impacts":["privilege_escalation","code_execution"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"InsydeH2O BIOS","requires_auth":"high_privilege","summary":"An SMM memory corruption flaw in InsydeH2O firmware allows attackers to write to SMRAM, potentially escalating privileges to System Management Mode.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"mitre","cpe":[{"product":"insydeh2o","vendor":"insyde"},{"product":"ruggedcom_ape1808_firmware","vendor":"siemens"},{"product":"simatic_field_pg_m5_firmware","vendor":"siemens"},{"product":"simatic_field_pg_m6_firmware","vendor":"siemens"},{"product":"simatic_ipc127e_firmware","vendor":"siemens"},{"product":"simatic_ipc227g_firmware","vendor":"siemens"},{"product":"simatic_ipc277g_firmware","vendor":"siemens"},{"product":"simatic_ipc327g_firmware","vendor":"siemens"},{"product":"simatic_ipc377g_firmware","vendor":"siemens"},{"product":"simatic_ipc427e_firmware","vendor":"siemens"},{"product":"simatic_ipc477e_firmware","vendor":"siemens"},{"product":"simatic_ipc627e_firmware","vendor":"siemens"},{"product":"simatic_ipc647e_firmware","vendor":"siemens"},{"product":"simatic_ipc677e_firmware","vendor":"siemens"},{"product":"simatic_ipc847e_firmware","vendor":"siemens"},{"product":"simatic_itp1000_firmware","vendor":"siemens"}],"cvss":{"score":8.2,"severity":"high","source":"nvd","vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-787","name":"Out-of-bounds Write"}],"description":"An issue was discovered in Insyde InsydeH2O with Kernel 5.0 before 05.08.42, Kernel 5.1 before 05.16.42, Kernel 5.2 before 05.26.42, Kernel 5.3 before 05.35.42, Kernel 5.4 before 05.42.51, and Kernel 5.5 before 05.50.51. An SMM memory corruption vulnerability in FvbServicesRuntimeDxe allows a possible attacker to write fixed or predictable data to SMRAM. Exploiting this issue could lead to escalating privileges to SMM.","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":"Memory corruption in n/a","id":"CVE-2021-42554","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"insyde:insydeh2o","products":["insyde:insydeh2o"],"type":"memory_corruption","year":"2021"},"n_packages":0,"n_references":4,"next":{"headline":"Denial of service in n/a","id":"CVE-2021-42555"},"packages":[],"prev":{"headline":"STM32 USB Host Library Buffer Overflow","id":"CVE-2021-42553"},"products":["n/a"],"published":"2022-02-03","related":[{"cvss_score":9.8,"headline":"Missing authorization in n/a","id":"CVE-2021-41842","kev_date_added":null,"published":"2022-01-05"},{"cvss_score":8.8,"headline":"Memory corruption in n/a","id":"CVE-2023-22612","kev_date_added":null,"published":"2023-04-11"},{"cvss_score":8.8,"headline":"Memory corruption in n/a","id":"CVE-2023-22613","kev_date_added":null,"published":"2023-04-11"},{"cvss_score":8.8,"headline":"Memory corruption in n/a","id":"CVE-2023-22614","kev_date_added":null,"published":"2023-04-11"},{"cvss_score":8.4,"headline":"Memory corruption in n/a","id":"CVE-2023-22615","kev_date_added":null,"published":"2023-04-11"},{"cvss_score":8.2,"headline":"Memory corruption in n/a","id":"CVE-2022-36448","kev_date_added":null,"published":"2022-09-28"},{"cvss_score":8.2,"headline":"Memory corruption in n/a","id":"CVE-2022-35893","kev_date_added":null,"published":"2022-09-23"}],"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":"2026-08-11","vendors":["n/a"]},"summary":"An SMM memory corruption flaw in InsydeH2O firmware allows attackers to write to SMRAM, potentially escalating privileges to System Management Mode.","url":"https://insights.sbomify.com/CVE-2021-42554/"}