{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-71920 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-71920 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-71920 is a medium-severity vulnerability in DrayTek Corporation VigorSwitch FX2120, published on 24 Aug 2026. An attacker needs administrator access to exploit it, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-71920 and fix it if it is affected.\n\nWhat it is: CVE-2026-71920 is a medium-severity vulnerability in DrayTek Corporation VigorSwitch FX2120, published on 24 Aug 2026. An attacker needs administrator access to exploit it, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-71920 in the wild and no public exploit code.\n\nAffected product: DrayTek Corporation VigorSwitch FX2120. 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-2026-71920/ (Markdown: https://insights.sbomify.com/CVE-2026-71920/index.md)","id":"CVE-2026-71920","markdown":"https://insights.sbomify.com/CVE-2026-71920/index.md","name":"CVE-2026-71920","record":{"aliases":["GHSA-648m-vmc5-h63x"],"analysis":{"component_type":"network_device","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"DrayTek network switch","requires_auth":"high_privilege","summary":"Remote authenticated attackers can crash DrayTek VigorSwitch devices via a null pointer dereference in the logout function.","user_interaction":"not_required","vuln_class":"null_dereference"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[],"cvss":{"score":6.9,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-476","name":"NULL Pointer Dereference"}],"description":"Multiple DrayTek VigorSwitch models contain a null pointer dereference vulnerability in the formlogout function. The vulnerability is caused by missing checks for an empty or absent Cookie header before string handling. A remote attacker can trigger this vulnerability via a crafted request to crash the service and cause a denial of service. Exploitation requires valid administrative credentials for the device's web management interface.","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":"DrayTek VigorSwitch Multiple Models NULL Pointer Dereference via formlogout","id":"CVE-2026-71920","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"null_dereference","year":"2026"},"n_packages":0,"n_references":2,"next":{"headline":"DrayTek VigorSwitch Multiple Models Pre-Authentication OS Command Injection via setget.cgi","id":"CVE-2026-71921"},"packages":[],"prev":{"headline":"DrayTek VigorSwitch Multiple Models OS Command Injection via sysreboot","id":"CVE-2026-71919"},"products":["VigorSwitch FX2120","VigorSwitch G1280","VigorSwitch G1282","VigorSwitch G2100","VigorSwitch G2121","VigorSwitch G2280x","VigorSwitch G2282x","VigorSwitch G2540x","VigorSwitch G2540xs","VigorSwitch G2542x","VigorSwitch P1280","VigorSwitch P1281x","VigorSwitch P1282","VigorSwitch P2100","VigorSwitch P2121","VigorSwitch P2280x","VigorSwitch P2282x","VigorSwitch P2540x","VigorSwitch P2540xs","VigorSwitch P2542x","VigorSwitch P2542xh","VigorSwitch PQ2121x","VigorSwitch PQ2200xb","VigorSwitch PQ2300xb","VigorSwitch PX2060","VigorSwitch Q2121x","VigorSwitch Q2200x","VigorSwitch Q2300x"],"published":"2026-08-24","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":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-08-24","vendors":["DrayTek Corporation"]},"summary":"Remote authenticated attackers can crash DrayTek VigorSwitch devices via a null pointer dereference in the logout function.","url":"https://insights.sbomify.com/CVE-2026-71920/"}