{"answers":{"affected":"","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-76071 exists.","fix":"No fix has been published for CVE-2026-76071 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-76071 is a critical memory corruption vulnerability in Netis Systems NC63, published on 24 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-76071 and fix it if it is affected.\n\nWhat it is: CVE-2026-76071 is a critical memory corruption vulnerability in Netis Systems NC63, published on 24 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-76071 exists.\n\nAffected product: Netis Systems NC63. 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-2026-76071/ (Markdown: https://insights.sbomify.com/CVE-2026-76071/index.md)","id":"CVE-2026-76071","markdown":"https://insights.sbomify.com/CVE-2026-76071/index.md","name":"CVE-2026-76071","record":{"aliases":["GHSA-mx2q-89wp-jrvh"],"analysis":{"component_type":"network_device","fix_type":"no_fix_stated","impacts":["code_execution","privilege_escalation"],"network_reachable":"yes","non_default_config":false,"product_category":"Netis router firmware","requires_auth":"none","summary":"Unauthenticated remote attackers can achieve root code execution on Netis NC63 routers via a stack buffer overflow in the netis.cgi script.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"VulnCheck","cpe":[],"cvss":{"score":9.3,"severity":"critical","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-121","name":"Stack-based Buffer Overflow"}],"description":"Netis NC63 firmware through V3.0.0.3327 contains a stack-based buffer overflow vulnerability that allows unauthenticated remote attackers to overwrite saved stack state by supplying an oversized destHost parameter to the ipFilterList=mod action in netis.cgi. Attackers can exploit widthless sscanf conversions that copy user-supplied input into fixed-size stack buffers before authentication is verified, achieving remote code execution as root due to the Boa web server executing the CGI environment with root privileges.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":"2026-08-19","github_poc":1,"max_poc_stars":1,"metasploit":0,"nuclei":0,"refs":[{"date":"2026-08-19T23:29:54Z","kind":"github_poc","ref":"https://github.com/ozcanpng/CVE-2026-76071","stars":1,"title":"Original research and PoC for a pre-auth stack buffer overflow via unbounded sscanf scanset in the Netis NC63 ipFilterList handler"}],"tier":"weaponised"},"has_fix":null,"headline":"Netis NC63 V3.0.0.3327 Stack Buffer Overflow via destHost Parameter","id":"CVE-2026-76071","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"memory_corruption","year":"2026"},"n_packages":0,"n_references":4,"next":{"headline":"Continue CLI through 1.5.47 Incomplete Destructive Command Denylist in Headless and Auto Mode","id":"CVE-2026-76072"},"packages":[],"prev":{"headline":"Netis NC63 V3.0.0.3327 Stack Buffer Overflow via Login Password Parameter","id":"CVE-2026-76070"},"products":["NC63"],"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)"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":"yes","exploitation":"poc","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-08-26","vendors":["Netis Systems"]},"summary":"Unauthenticated remote attackers can achieve root code execution on Netis NC63 routers via a stack buffer overflow in the netis.cgi script.","url":"https://insights.sbomify.com/CVE-2026-76071/"}