{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-15340 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-15340 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-15340 is a critical memory corruption vulnerability in Savannah lwIP SMTP client, published on 9 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-2026-15340 and fix it if it is affected.\n\nWhat it is: CVE-2026-15340 is a critical memory corruption vulnerability in Savannah lwIP SMTP client, published on 9 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-2026-15340 in the wild and no public exploit code.\n\nAffected product: Savannah lwIP SMTP client. 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-2026-15340/ (Markdown: https://insights.sbomify.com/CVE-2026-15340/index.md)","id":"CVE-2026-15340","markdown":"https://insights.sbomify.com/CVE-2026-15340/index.md","name":"CVE-2026-15340","record":{"aliases":["DEBIAN-CVE-2026-15340","GHSA-5x4f-h328-9vjh"],"analysis":{"component_type":"library","fix_type":"patch","impacts":["code_execution","denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"lwIP SMTP client","requires_auth":"none","summary":"A buffer overflow in the lwIP SMTP client allows attackers to execute arbitrary code or cause denial of service due to unchecked input sizes.","user_interaction":"not_required","vuln_class":"memory_corruption"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"icscert","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-120","name":"Buffer Copy without Checking Size of Input"}],"description":"lwIP SMTP client does not check the size of inputs, potentially allowing a buffer overflow.","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":"Savannah lwIP SMTP client Classic Buffer Overflow","id":"CVE-2026-15340","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":"Auth bypass in User Session Synchronizer","id":"CVE-2026-15341"},"packages":[],"prev":{"headline":"Path traversal in LA-Studio Element Kit for Elementor","id":"CVE-2026-15338"},"products":["lwIP SMTP client"],"published":"2026-10-09","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":"2026-10-11","vendors":["Savannah"]},"summary":"A buffer overflow in the lwIP SMTP client allows attackers to execute arbitrary code or cause denial of service due to unchecked input sizes.","url":"https://insights.sbomify.com/CVE-2026-15340/"}