{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-102721 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-102721 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-102721 is a medium-severity memory corruption vulnerability in Eclipse Foundation NetX Duo, published on 29 Sep 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-2026-102721 and fix it if it is affected.\n\nWhat it is: CVE-2026-102721 is a medium-severity memory corruption vulnerability in Eclipse Foundation NetX Duo, published on 29 Sep 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-2026-102721 in the wild and no public exploit code.\n\nAffected product: Eclipse Foundation NetX Duo. 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-2026-102721/ (Markdown: https://insights.sbomify.com/CVE-2026-102721/index.md)","id":"CVE-2026-102721","markdown":"https://insights.sbomify.com/CVE-2026-102721/index.md","name":"CVE-2026-102721","record":{"aliases":["GHSA-5cxq-44w6-64mx","GHSA-wvc9-5m9h-rvxc"],"analysis":{"component_type":"operating_system","fix_type":"patch","impacts":["data_read","denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"NetX Duo TFTP client","requires_auth":"none","summary":"A malicious TFTP server can trigger a heap buffer overflow in the NetX Duo client, leaking adjacent memory or causing a crash.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"eclipse","cpe":[],"cvss":{"score":6.9,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-125","name":"Out-of-bounds Read"}],"description":"A TFTP server that answers with a short ERROR packet makes the client read up to 64 bytes past the\n\nreceived datagram.\n\nEach receive path checks only that the datagram is at least four bytes long (nxd_tftp_client.c:1229,\n\n1521, 1984). When the opcode is NX_TFTP_CODE_ERROR the message string is copied with a loop whose\n\nonly limits are the destination buffer and a NUL byte:\n\n```c\n\n/* addons/tftp/nxd_tftp_client.c:1769 */\n\nfor (i = 0; (i \u003c (sizeof(tftp_client_ptr -\u003e nx_tftp_client_error_string) - 1)) \u0026\u0026 (*buffer_ptr); i++)\n\n```\n\nNothing compares `buffer_ptr` against `nx_packet_append_ptr`. An ERROR packet that carries no\n\nterminating NUL, which a server controls completely, walks the loop off the end of the packet until\n\nit happens to meet a zero byte or fills the 64 byte destination.\n\n```\n\nERROR: AddressSanitizer: heap-buffer-overflow\n\nREAD of size 1 at 0x60d0000000c8 thread T4\n\n    #0 _nxd_tftp_client_file_read  addons/tftp/nxd_tftp_client.c:1769\n\n0x60d0000000c8 is 0 bytes to the right of 136-byte region\n\n```\n\nThe open path has the same loop at :1327 and reports the same way. What is read lands in\n\n`nx_tftp_client_error_string`, which the application is expected to display or log, so adjacent\n\npacket pool memory ends up in whatever the device does with the error text.\n\nAdd `(buffer_ptr \u003c packet_ptr -\u003e nx_packet_append_ptr)` to the loop condition in all three paths.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":false,"headline":"Memory corruption in NetX Duo","id":"CVE-2026-102721","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":"Server-side request forgery in NetX Duo","id":"CVE-2026-102722"},"packages":[],"prev":{"headline":"Memory corruption in eclipse-threadx/netxduo","id":"CVE-2026-102720"},"products":["NetX Duo"],"published":"2026-09-29","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":"partial"},"state":"PUBLISHED","updated":"2026-09-29","vendors":["Eclipse Foundation"]},"summary":"A malicious TFTP server can trigger a heap buffer overflow in the NetX Duo client, leaking adjacent memory or causing a crash.","url":"https://insights.sbomify.com/CVE-2026-102721/"}