{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-20423 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-20423 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-20423 is a high-severity memory corruption vulnerability in MediaTek, Inc. MediaTek chipset, published on 2 Mar 2026. 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-2026-20423 and fix it if it is affected.\n\nWhat it is: CVE-2026-20423 is a high-severity memory corruption vulnerability in MediaTek, Inc. MediaTek chipset, published on 2 Mar 2026. 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-2026-20423 in the wild and no public exploit code.\n\nAffected product: MediaTek, Inc. MediaTek chipset. 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-2026-20423/ (Markdown: https://insights.sbomify.com/CVE-2026-20423/index.md)","id":"CVE-2026-20423","markdown":"https://insights.sbomify.com/CVE-2026-20423/index.md","name":"CVE-2026-20423","record":{"aliases":["GHSA-5pr4-qmc6-fvxj"],"analysis":{"component_type":"hardware_firmware","fix_type":"patch","impacts":["privilege_escalation"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"MediaTek chipset","requires_auth":"low_privilege","summary":"A missing bounds check in the MediaTek WLAN STA driver allows local attackers to escalate privileges via an out-of-bounds write.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"MediaTek","cpe":[{"product":"nbiot_sdk","vendor":"mediatek"}],"cvss":{"score":7.8,"severity":"high","source":"cisa-adp","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-787","name":"Out-of-bounds Write"},{"id":"CWE-749","name":"Exposed Dangerous Method or Function"}],"description":"In wlan STA driver, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege with User execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00465314; Issue ID: MSV-4956.","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 MediaTek chipset","id":"CVE-2026-20423","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"memory_corruption","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"Information disclosure in MediaTek chipset","id":"CVE-2026-20424"},"packages":[],"prev":{"headline":"Denial of service in MediaTek chipset","id":"CVE-2026-20422"},"products":["MediaTek chipset"],"published":"2026-03-02","related":[{"cvss_score":9.8,"headline":"Memory corruption in MT7902, MT7920, MT7921, MT7922, MT7925, MT7927","id":"CVE-2025-20680","kev_date_added":null,"published":"2025-07-08"},{"cvss_score":9.8,"headline":"Memory corruption in MT2621, MT2625","id":"CVE-2022-26437","kev_date_added":null,"published":"2022-08-01"},{"cvss_score":9.3,"headline":"Memory corruption in MediaTek chipset","id":"CVE-2026-20407","kev_date_added":null,"published":"2026-02-02"},{"cvss_score":6.7,"headline":"Memory corruption in MediaTek chipset","id":"CVE-2026-20436","kev_date_added":null,"published":"2026-03-02"},{"cvss_score":6.5,"headline":"Denial of service in MediaTek chipset","id":"CVE-2026-20419","kev_date_added":null,"published":"2026-02-02"},{"cvss_score":5.5,"headline":"Denial of service in MT7902, MT7920, MT7921, MT7922, MT7925, MT7927","id":"CVE-2025-20687","kev_date_added":null,"published":"2025-07-08"}],"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":"no","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-03-30","vendors":["MediaTek, Inc."]},"summary":"A missing bounds check in the MediaTek WLAN STA driver allows local attackers to escalate privileges via an out-of-bounds write.","url":"https://insights.sbomify.com/CVE-2026-20423/"}