{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-111711 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-111711 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-111711 is a critical memory corruption vulnerability in Netcore NR256CN, published on 16 Oct 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-2026-111711 and fix it if it is affected.\n\nWhat it is: CVE-2026-111711 is a critical memory corruption vulnerability in Netcore NR256CN, published on 16 Oct 2026. 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-2026-111711 in the wild and no public exploit code.\n\nAffected product: Netcore NR256CN. 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-2026-111711/ (Markdown: https://insights.sbomify.com/CVE-2026-111711/index.md)","id":"CVE-2026-111711","markdown":"https://insights.sbomify.com/CVE-2026-111711/index.md","name":"CVE-2026-111711","record":{"aliases":["GHSA-5769-g37j-m8jq"],"analysis":{"component_type":"network_device","fix_type":"no_fix_stated","impacts":["code_execution","denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Netcore router","requires_auth":"none","summary":"Unauthenticated attackers can trigger a stack overflow in the Boa web server via long usernames, potentially executing code or crashing the router.","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":"Netcore NR256CN through 1.5.140116 contains a pre-authentication stack overflow vulnerability in the Boa web server's user_ok() function, which copies Basic-auth usernames with unbounded strcpy() calls into 64-byte stack buffers. Unauthenticated attackers can send a username longer than 63 bytes to any protected /router/*.cgi route to crash the main Boa process or potentially execute code.","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":"Netcore NR256CN through 1.5.140116 Pre-Auth Stack Overflow via Boa user_ok()","id":"CVE-2026-111711","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"memory_corruption","year":"2026"},"n_packages":0,"n_references":2,"next":{"headline":"Netcore NR256CN through 1.5.140116 Authentication Bypass via CGI Path Prefix","id":"CVE-2026-111712"},"packages":[],"prev":{"headline":"Netcore NR256CN through 1.5.140116 Boa Web Server NULL Pointer Dereference DoS","id":"CVE-2026-111710"},"products":["NR256CN"],"published":"2026-10-16","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":"yes","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-10-16","vendors":["Netcore"]},"summary":"Unauthenticated attackers can trigger a stack overflow in the Boa web server via long usernames, potentially executing code or crashing the router.","url":"https://insights.sbomify.com/CVE-2026-111711/"}